TECHNIQUES AND SYSTEMS FOR SERVICING A PERSONAL

COMMUNICATION STRUCTURE (PCS)

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and the benefit of, and hereby incorporates by reference herein in its entirety, U.S. Provisional Patent Application Serial Number 62/256,033, filed on November 16, 2015 under Attorney Docket No. COI-006PR.

FIELD OF INVENTION

[0002] The present disclosure relates generally to techniques and systems for servicing a personal communication structure (PCS). Some embodiments relate particularly to testing and repairing a PCS, which may have compartmentalized, independently-accessible subsystems.

BACKGROUND

[0003] In some public or semi-public areas, various structures can be used for communication or to obtain access to goods and services. For example, telephone booths can be used to place telephone calls. Interactive kiosks can be used to obtain access to information, products, and/or services. Some interactive kiosks are self-service kiosks, which allow patrons of a business to perform service tasks that were historically performed by business employees. For example, the automated teller machine (ATM) is a self-service kiosk that allows users to deposit funds into a financial account, withdraw funds from an account, check an account balance, etc. - tasks that were historically performed with the assistance of a human bank teller. As another example, some retail stores allow customers to scan and pay for their items at self-service checkout kiosks rather than checkout stations staffed by human cashiers.

[0004] An interactive kiosk generally includes a computer terminal, which executes software and/or controls hardware peripherals to perform the kiosk's tasks. Many interactive kiosks are deployed inside buildings that are accessible to the public (e.g., banks, stores), in areas where the building operators can monitor the kiosks and protect them from unauthorized access. In some cases, interactive kiosks are integrated into walls of buildings (e.g., some ATMs are integrated into walls of banks), fastened to walls, or placed against walls, which can protect the kiosks from unauthorized access and reduce the occurrence of potentially dangerous events such as the kiosks tipping or overturning.

SUMMARY OF THE INVENTION

[0005] In recent years, public telephone booths have dwindled in number and many of the remaining booths have fallen into relative disuse and disrepair. The demise of the public telephone booth can be traced, in part, to the increasing prevalence of mobile phones and to the widespread use of communication networks for non-telephonic purposes. Many people who wish to participate in telephone conversations in public places prefer the convenience of their own mobile phones to the inconvenience of a stationary phone booth. Furthermore, in contrast to many mobile phones, conventional public telephone booths do not allow users to access Internet-based data and services. Many people who wish to access Internet-based data and services in public places use mobile computing devices (e.g., smartphones or laptop computers) and wireless networks (e.g., mobile broadband networks or Wi-Fi networks) to do so. In short, for many people, the public telephone booth is less convenient and less functional than other readily-available options for connecting to a communication network.

[0006] Despite the seeming ubiquity of mobile computing devices, many people are often left with insufficient access to telephonic or Internet-based services. In some areas, wireless network coverage may be poor or nonexistent. In areas where wireless networks are available, the number of network users or the volume of network traffic may exceed the capacity of the network, leaving some users unable to connect to the network, and degrading quality of service for users who are able to connect (e.g., degrading audio quality of phone calls or reducing rates of data communication). Even when wireless networks are available and not congested, some people may not have access to telephonic or Internet-based services because they may not have suitable computing devices or network-access agreements (e.g., a person may not own a computing device, may own a computing device but not have a network-access agreement with an Internet-service provider, may not own a mobile computing device, may have a mobile computing device with an uncharged battery, etc.).

[0007] There is a need for personal communication structures (PCSs) that enhance public access to communication networks. Such PCSs may enhance access to communication networks by expanding network coverage (e.g., making communication networks available in areas where they would otherwise be unavailable), expanding network capacity (e.g., increasing the capacity of communication networks in areas where such networks are available), expanding access to end-user computing devices and telephones, and/or expanding access to charging outlets for mobile computing devices. By enhancing access to

communication networks, the PCSs may improve the employment prospects, educational opportunities, and/or quality of life for individuals, families, and communities that would otherwise have limited access to communication networks.

[0008] From time to time, it may be necessary or desirable for an authorized party to perform maintenance on the PCS (e.g., to repair or replace PCS components, to adjust settings of PCS components, etc.). In some cases, a PCS operator may have contractual obligations to repair or replace faulty or damaged components within a specified time period (e.g., within 24 hours). It can be appreciated that identifying faults and repairing (or replacing) faulty PCS components under stringent time constraints presents significant logistical challenges, particularly in cases where the PCS operator is responsible for a large number (e.g., hundreds or thousands) of PCSs deployed in a densely developed metropolitan area.

[0009] Public access to communication networks can be enhanced by placing PCSs in public locations, including sidewalks, parking facilities, mass transit stations, etc. It can be appreciated that PCSs in public locations can be exposed to a broad range of operating conditions (e.g., high or low temperatures, high or low humidity, various forms of precipitation, large or small particles suspended in the air, high winds, substantial solar radiation, electrical activity, mechanical forces, etc.). It can also be appreciated that various components of the PCS may operate properly in certain conditions and improperly in other conditions (or after being exposed to such conditions). The inventors have recognized and appreciated that faulty or damaged PCS equipment can, in some cases, be identified more quickly by providing the PCS with a servicing system operable to systematically test the PCS's components for faults in response to detecting various operating conditions.

[0010] In some embodiments, the components of a PCS are divided among independently accessible, independently secured compartments, such that authorized parties can be granted access to some PCS components, without granting those parties access to other PCS components. Such an arrangement of secure PCS compartment may facilitate maintenance and operation of the PCS in scenarios where different maintenance providers and/or operators of the PCS need access only to limited subsets of the PCS's components (e.g., to perform maintenance or tests on those components, to repair or replace those components, to adjust the settings of those components, etc.). In some embodiments, the PCS's servicing system may include servicing controllers disposed in the various PCS compartments, such that each servicing controller is operable to perform servicing tasks on components in the same compartment as the servicing controller, but not on components in other compartments.

[0011] According to an aspect of the present disclosure, a personal communication structure (PCS) includes a power distribution subsystem, a communications subsystem, a display subsystem, and a servicing controller operable to: determine whether one or more

environmental criteria for initiating a test of a component of the PCS are satisfied, wherein the component of the PCS is included in the power distribution subsystem, the communications subsystem, or the display subsystem; and based on a determination that one or more environmental criteria for initiating the test of the component are satisfied, initiating the test of the component.

[0012] In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a temperature T at the PCS is less than a threshold temperature TLOW or greater than a threshold temperature THIGH- In some embodiments, the temperature T at the PCS includes a temperature at a location outside and adjacent to the PCS, a temperature of a surface of the PCS, or a temperature within the PCS. In some embodiments, the PCS further includes a temperature sensor operable to determine the temperature T, wherein the temperature sensor is

communicatively coupled to the servicing controller. In some embodiments, the servicing controller is communicatively coupled to a communication network, and the servicing controller is operable to receive temperature data indicating the temperature T via the network.

[0013] In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a humidity level H at the PCS is less than a particular humidity level H _L ow or greater than a particular humidity level H _H IGH- In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a particular type of precipitation is present at the PCS. In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether an airbome particle level P at the PCS is greater than a particular airbome particle level PHIGH- In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a wind speed W at the PCS is greater than a particular wind speed WHIGH- In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a sunlight level S at the PCS is less than a specified sunlight level SLOW or greater than a particular sunlight level SHIGH- In some embodiments, determining whether one or more environmental criteria for initiating a test of a component of the PCS are satisfied includes determining whether a mechanical force F applied to the PCS is greater than a particular mechanical force FMAX-

[0014] In some embodiments, the PCS further includes a plurality of independently accessible compartments at least partially enclosing respective subsystems of the PCS, the plurality of independently accessible compartments including: an electronics compartment at least partially enclosing the power distribution subsystem, a communications compartment at least partially enclosing the communications subsystem, and a display compartment at least partially enclosing the display subsystem. In some embodiments, the PCS further includes an access controller operable to provide access independently to respective interiors of at least a subset of the compartments.

[0015] In some embodiments, the servicing controller is disposed in the electronics compartment. In some embodiments, the component is included in the power distribution subsystem. In some embodiments, the component is included in the communications subsystem. In some embodiments, the servicing controller is disposed in the display compartment and the component is included in the display subsystem.

[0016] In some embodiments, the servicing controller is a first servicing controller disposed in the electronics compartment, the component is a first component included in the power distribution subsystem, and the PCS further includes a second servicing controller disposed in the display compartment and operable to: determine whether one or more environmental criteria for initiating a test of a component of the display subsystem; and based on a determination that one or more environmental criteria for initiating the test of the component of the display subsystem are satisfied, initiating the test of the component of the display subsystem.

[0017] In some embodiments, the electronics compartment includes an access panel movable between an open position and a closed position, and a lock operable to lock the access panel in the closed position. In some embodiments, the access controller is operable to provide access to an interior of the electronics compartment by performing at least one operation selected from the group consisting of disengaging the lock and moving the access panel to the open position. In some embodiments, the display compartment includes an access member movable between an open position and a closed position, and a lock operable to lock the access member in the closed position. In some embodiments, the access controller is operable to provide access to an interior of the display compartment by performing at least one operation selected from the group consisting of disengaging the lock and moving the access member to the open position.

[0018] In some embodiments, the access controller includes a processing device, the subset of the independently accessible compartments include respective locks, and the processing device is configured to independently disengage the respective locks. In some embodiments, the processing device is configured to receive authentication data and to disengage at least one of the locks based on the authentication data meeting authentication requirements associated with the locks.

[0019] In some embodiments, the servicing controller is further operable to initiate the test of the component at a preprogrammed time, periodically, based on a message received from a remote entity via a network, at a randomly selected time, and/or based on receiving user input via a user interface subsystem of the PCS. In some embodiments, the servicing controller is further operable to delay initiation of the test or abort the test based on an occurrence of an event. In some embodiments, the event includes user interaction with the PCS. In some embodiments, the servicing controller is operable to reschedule the delayed or aborted test for execution at a future time. In some embodiments, the future time is randomly selected.

[0020] In some embodiments, the servicing controller is operable to transmit a result of the test to a remote entity. In some embodiments, the result of the test includes one or more codes, and the one or more codes include at least one code representing information selected from the group consisting of a component identification number, a field replaceable unit (FRU) number, a warning, a measurement, a setting, diagnostic information, a model number, a serial number, a PCS configuration, a priority level, a time, a date, a location of the PCS, and a risk-hazard level.

[0021] In some embodiments, the diagnostic information includes at least one item of information selected from the group consisting of a temperature measurement, a voltage measurement, a current measurement, a frequency measurement, an ambient light

measurement, an environmental measurement, a backlight setting, a health indicator, a component status, a battery status, a fan status, a communications status, a compartment status and a door status.

[0022] In some embodiments, the component is selected from the group consisting of: a display, display backlight, processing device, sensor, WiFi access point, keypad, pushbutton, switch, touchscreen, camera, microphone, speaker, hearing loop, LTE module, 3G module, accelerometer, solenoid, actuator, circuit breaker, GFCI, small cell, fan, blower, near field communications (NFC) module, battery, Ethernet switch, service switch, network switch, fiber switch, temperature controller, power distribution controller, USB charging station and E911 call system.

[0023] In some embodiments, the servicing controller is further operable to determine, at a first time, that one or more environmental criteria for initiating a second test of a second component of the PCS are satisfied; and based on a determination that a prior event occurred at a second time within a predetermined period of time prior to the first time, skip the second test. In some embodiments, the servicing controller is further operable to transmit, to a remote entity, an indication of a period during which use of the PCS is low.

[0024] Other aspects and advantages of the invention will become apparent from the following drawings, detailed description, and claims, all of which illustrate the principles of the invention, by way of example only. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Certain advantages of some embodiments may be understood by referring to the following description taken in conjunction with the accompanying drawings. In the drawings, like reference characters generally refer to the same parts throughout the different views. Also, the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating principles of some embodiments of the invention.

[0026] FIG. 1 is a block diagram of a personal communication structure (PCS), in accordance with some embodiments;

[0027] FIG. 2 is a schematic of a power distribution subsystem of a PCS, in accordance with some embodiments;

[0028] FIG. 3 is a schematic of a network subsystem of a PCS, in accordance with some embodiments; [0029] FIG. 4 is a schematic of a maintenance subsystem of a PCS, in accordance with some embodiments;

[0030] FIG. 5 is a block diagram of a user interface subsystem of a PCS, in accordance with some embodiments;

[0031] FIG. 6 is a schematic of a user interface subsystem of a PCS, in accordance with some embodiments;

[0032] FIG. 7 is a schematic of a display module of a PCS, in accordance with some embodiments;

[0033] FIG. 8 illustrates an arrangement of compartments of a PCS, in accordance with some embodiments;

[0034] FIGS. 9A, 9B, and 9C show respective front perspective, side, and exploded front perspective views of a PCS, in accordance with some embodiments;

[0035] FIGS. 10A, 10B, and IOC show respective side perspective, front perspective, and exploded front perspective views of a frame of a PCS, in accordance with some embodiments;

[0036] FIG. 11 shows a perspective view of a portion of a PCS, in accordance with some embodiments;

[0037] FIGS. 12A and 12B show front perspective views of a PCS with ribbed panels, in accordance with some embodiments;

[0038] FIG. 12C shows a schematic side view of a ribbed panel, in accordance with some embodiments;

[0039] FIG. 13 illustrates a system for controlling access to components of a PCS, in accordance with some embodiments;

[0040] FIG. 14 shows a perspective view of a security fastener;

[0041] FIG. 15 shows a block diagram of an access controller, in accordance with some embodiments;

[0042] FIG. 16 shows a perspective view of an electronics compartment, in accordance with some embodiments;

[0043] FIGS. 17A and 17B show respective front and rear perspective views of an electronics cabinet, in accordance with some embodiments;

[0044] FIGS. 18A and 18B show respective front and exploded front perspective views of an air intake assembly, in accordance with some embodiments; [0045] FIGS. 19A and 19B show respective front perspective and rear perspective views of a user interface device, in accordance with some embodiments;

[0046] FIG. 20 shows a perspective view of a display compartment, in accordance with some embodiments;

[0047] FIG. 21 shows an exploded perspective view of display module, in accordance with some embodiments;

[0048] FIG. 22 shows a perspective cut-away view of a compartment lock of a display compartment, in accordance with some embodiments;

[0049] FIGS. 23A and 23B show side views of a compartment lock of a display compartment with the lock engaged (FIG. 23 A) and disengaged (FIG. 23B), in accordance with some embodiments;

[0050] FIG. 24 shows a perspective view of a communications compartment, in accordance with some embodiments;

[0051] FIG. 25 shows a perspective view of a mounting compartment, in accordance with some embodiments;

[0052] FIG. 26 is a flowchart of a method for servicing a PCS, in accordance with some embodiments;

[0053] FIG. 27 is a block diagram of a servicing system of a PCS, in accordance with some embodiments;

[0054] FIG. 28 is a block diagram of another servicing system of a PCS, in accordance with some embodiments; and

[0055] FIG. 29 is a flowchart of another method for servicing a PCS, according to some embodiments.

DETAILED DESCRIPTION

Overview of a Personal Communication Structure (PCS)

[0056] FIG. 1 illustrates a personal communication structure (PCS) 100, according to some embodiments. PCS 100 enhances access to communication networks in public or semi-public places. In some embodiments, PCS 100 includes an electronics subsystem 140, a user interface subsystem 150, a temperature control subsystem 160, a display subsystem 170, a

communications subsystem 180, and/or a mounting subsystem 190. Electronics subsystem 140 may include a power distribution subsystem 110, a network subsystem 120, and/or a maintenance subsystem 130. These and other components of PCS 100 are described in further detail below.

[0057] Power distribution subsystem 110 distributes electrical power to components of PCS 100. Power distribution subsystem 100 may provide power to network subsystem 120, maintenance subsystem 130, other components of electronics subsystem 140, user interface subsystem 150, temperature control subsystem 160, display subsystem 170, and/or

communications subsystem 180. Power distribution subsystem 110 may distribute power provided by any suitable power source(s) including, without limitation, batteries, solar panels, a power line 112 coupled to a power grid, etc. In some embodiments, power distribution subsystem 110 includes one or more power converters operable to convert power from one form (e.g., AC power) into another form (e.g., DC power) suitable for the PCS's components. In some embodiments, power distribution subsystem 110 includes one or more voltage level converters operable to change the voltage level of a signal to a level compatible with a component of the PCS. The ground terminal of the power distribution subsystem 110 may be coupled to a reference potential 114 via the chassis of the PCS or via any other suitable path.

[0058] FIG. 2 shows a schematic of a power distribution subsystem 110, according to some embodiments. In some embodiments, power distribution subsystem (PDS) 110 includes a power conversion system 204, a power distribution board 202, and a battery 206. The inputs to power conversion system 204 include AC power supply signals (e.g., 120 VAC at 60 Hz) carried on a hot line 212, a neutral line 214, and a ground line 216. In some embodiments, the hot line 212 and neutral line 214 may be coupled to power conversion system 204 by quick disconnect devices 207 and 208, respectively, whereby the hot and neutral lines may be safely disconnected from power distribution subsystem 110 if the PCS is separated from its footing. Ground line 216 may be coupled to a ground terminal of the PCS 100. Power conversion system 204 processes the AC power supply signals and converts the processed signals into DC power supply signals. In some embodiments, power conversion system 204 includes a current transformer 222, AC power distribution unit 223, ground-fault circuit interrupter 224 (e.g., circuit breakers), AC line filter 226, and rectifier 218. Rectifier 218 may function as a DC power supply (e.g., a 24 V, 75 A, 2 kW DC power supply). As can be seen in FIG. 2, the outputs of various components of power conversion system 204 may be provided as inputs to power distribution board 202. [0059] Power distribution board 202 may detect power system faults and distribute DC power signals to other components of the PCS. In some embodiments, power distribution board 202 uses the AC signals provided by power conversion system 204 to perform fault detection (e.g., ground fault detection, stray voltage detection, etc.). In some embodiments, power distribution board 202 uses the DC power supply signals provided by power conversion system 204 and/or battery 206 to produce DC power supply signals at various voltage levels (e.g., 5V, 12V, and 24V DC), and distributes those DC power supply signals to suitable components of the PCS 100.

[0060] In some embodiments, power distribution system DC power signals can be switched on and off. As those skilled in the art can appreciate, staggered activation of high-power devices (e.g., one or more components of display subsystem 170) reduces in-rush current demand on power supply 218. In some embodiments, the power distribution subsystem 110 is able to measure output current and can shut off power supply signals when the device reaches an over- current threshold. When a device causes over-current and "trips" the output, an error message may be sent to a maintenance center, indicating that the PCS requires servicing.

[0061] Battery 206 may provide backup power for components of PCS 100, including but not limited to user interface subsystem 150, which may implement emergency communication (e.g., E911) functionality. In some embodiments, power distribution board 202 may charge battery 206 (e.g., at 24 VDC) when power conversion system 204 is producing DC power and PCS 100 is not using all the available DC power. In some embodiments, a solar charging system may charge battery 206 during power outages or at other times.

[0062] In some embodiments, the power distribution subsystem 110 can detect whether the ground-fault circuit interrupter 224 has tripped. The ability to detect activation of the ground- fault circuit interrupter 224 can facilitate maintenance of the PCS. For example, while on back- up battery power, the PDS may determine whether AC power is lost (e.g., by sensing whether AC power supply signals are present) or the ground-fault circuit interrupter 224 has tripped. A suitable message can then be sent to the maintenance center, indicating, for example, whether the PCS requires service.

[0063] Returning to FIG. 1, network subsystem 120 controls communication on a network 124 within PCS 100, and communication between internal network 124 and a network 126 extemal to the PCS. In some embodiments, network subsystem 120 uses network 124 to communicate with power distribution system 110, maintenance subsystem 130, user interface subsystem 150, temperature control subsystem 160, display subsystem 170, and/or communications subsystem 180. The nodes of network 124 may be arranged in one or more suitable network topologies, including, without limitation, a bus (e.g., with network subsystem 120 as the bus controller), star network (e.g., with network subsystem 120 as the central hub), ring network, mesh network, tree network, point-to-point network, etc. Network 124 may be implemented using one or more suitable communication technologies, including, without limitation, Ethernet, DVI (Digital Visual Interface), HDMI (High-Definition Multimedia Interface), USB (Universal Serial Bus), SMB (System Management Bus), I2C (Inter-Integrated Circuit) bus, VGA (Video Graphics Array), SCSI (Small Computer System Interface), SPI (Serial Peripheral Interface) bus, LVDS (low-voltage differential signaling), etc.

[0064] Network subsystem 120 may send and receive any suitable data. For example, network subsystem 120 may control the operation of other components of PCS 100 by sending control data to the PCS's subsystems. Network subsystem 120 may forward commands received from a suitable source, including, without limitation, other PCS subsystems and/or network 126. As another example, network subsystem 120 may send operand data to components of PCS 100 for processing by those components (e.g., data to be displayed by display subsystem 170 or user interface subsystem 150, data to be transmitted by communications subsystem 180, etc.).

[0065] In some embodiments, network subsystem 120 communicates with network 126 via data link 122. Data link 122 may be implemented using a suitable communications line, including, without limitation, an Ethemet cable, coaxial cable, or optical fiber. In some embodiments, network subsystem 120 may include a signal conversion device adapted to convert the signals received on data link 122 from one form (e.g., optical signals) into another form (e.g., electrical signals).

[0066] FIG. 3 shows a schematic of a network subsystem 120, in accordance with some embodiments. In one embodiment, network subsystem 120 includes a fiber junction box 302, a service delivery switch 304, and a network switch 306. In the example of FIG. 3, data link 122 includes one or more optical fibers. Fiber junction box 302 may optically couple the optical fibers of data link 122 to one or more internal optical fibers 322. In some embodiments, fiber junction box 302 includes one or more quick disconnect devices, whereby the optical fibers of data link 122 may be protected from damage if PCS 100 is separated from its footing. Service delivery switch 304 may convert the optical signals received on optical fibers 322 into electrical signals representing network traffic (e.g., Ethemet packets), and provide that network traffic to network switch 306. Likewise, service delivery switch 304 may convert the network traffic (e.g., Ethernet packets) received from network switch 306 into optical signals, and provide those optical signals to fiber junction box 302. Network switch 306 may switch network traffic between PCS subsystems, or between a PCS subsystem and network 126. In some embodiments, network switch 306 is an Ethernet switch. Network switch 306 may be powered by power distribution subsystem 110.

[0067] In some embodiments, network subsystem 120 includes a power-over-Ethernet (POE) injector 308. The POE injector 308 may provide power to one or more PCS subsystems, including, without limitation, communications subsystem 180.

[0068] Returning to FIG. 1, maintenance subsystem 130 runs maintenance diagnostics on components of PCS 100. In some embodiments, maintenance subsystem 130 performs tests on the PCS's components and/or initiates self-tests of the PCS's components. Such tests may be performed periodically (e.g., daily, weekly, monthly, etc.), intermittently, randomly, or at other suitable times. Alternatively or in addition, components of PCS 100 may perform such tests in response to commands received via network subsystem 120 (e.g., commands issued by a PCS operator via network 126 or via communications subsystem 180), or in response to other suitable events.

[0069] Based on the results of such tests, maintenance subsystem 130 may determine whether a tested component is operating properly. If a tested component is not operating properly, maintenance subsystem 130 may output data describing the component's malfunction (e.g., transmit an error code to a PCS operator via network 126 or communications subsystem 180, display an error message via display subsystem 170 or user interface subsystem 150, etc.), take action to resolve the malfunction (e.g., reboot the malfunctioning component), turn off power to the faulty component or to the entire PCS (e.g., if the malfunction presents a safety hazard), etc.

[0070] In some embodiments, maintenance subsystem 130 may be adapted to control or adjust the operation of power distribution subsystem 110, for safety purposes or other suitable purposes. As described above, if a safety hazard is detected, maintenance subsystem 130 may control power distribution subsystem 110 to deactivate the PCS 100 or the unsafe

component(s). Alternatively, maintenance subsystem 130 may control power distribution subsystem 110 to "power cycle" or "reboot" a malfunctioning component. [0071] FIG. 4 shows a schematic of a maintenance subsystem 130, in accordance with some embodiments. In various embodiments, maintenance subsystem 130 includes one or more processing devices 400. The processing device(s) may include, without limitation, a microprocessor, microcontroller, small-board computer, system on a chip (SoC) (e.g.,

Qualcomm Snapdragon, Nvidia Tegra, Intel Atom, Samsung Exynos, Apple A7, Motorola X8, etc.), or other suitable processing device. The processing device(s) 400 may communicate with other components of PCS 100 via network subsystem 120 to perform maintenance tasks, or for other suitable purposes. In some embodiments, processing device(s) 400 are powered by power distribution subsystem 110.

[0072] Returning to FIG. 1, in addition to power distribution subsystem 110, network subsystem 120, and/or maintenance subsystem 130, electronics subsystem 140 may include other components. In some embodiments, electronics subsystem 140 includes one or more illumination controllers, which control illumination of one or more lights coupled to or proximate to the PCS. When lit, the lights controlled by the illumination controller may illuminate user interface subsystem 150 or other portions of PCS 100. In some embodiments, electronics subsystem 140 includes one or more sensor controllers, which control one or more sensor devices (e.g., microphones, cameras, ambient light sensors, pressure sensors, voltage sensors, environmental sensors, accelerometers, etc.). Such sensors may be used for any suitable purpose, including, without limitation, adjusting the brightness of displays and/or lights based on ambient lighting, surveilling the region proximate to the PCS (e.g., when an attempt to gain unauthorized access to the PCS is detected), etc.

[0073] User interface subsystem 150 provides an interactive user interface, which may be used to access a communication network. Referring to FIG. 5, user interface subsystem 150 may include one or more user input devices 552, output devices 554, network modules 556 (e.g., network interface controllers, wireless transceivers, etc.), processing devices 557, and/or power supply ports 558. The user input device(s) 552 may include, without limitation, a touchscreen, touchpad, keyboard, keypad, trackball, one or more microphones, camera, buttons, switches, etc. The output device(s) 554 may include, without limitation, a display unit (e.g., touchscreen, LCD display, etc.), light(s), speaker(s), audio jack(s) (e.g., headset jacks, including

microphone), etc. The one or more network modules 556 may include, without limitation, a 3G mobile network transceiver, 4G mobile network transceiver, LTE mobile network transceiver, Wi-Fi transceiver, RFID reader, Bluetooth transceiver, Near Field Communication (NFC) transceiver, Ethernet adapter, etc. In some embodiments, at least one of the network modules 556 may be configured to access network 126 via network subsystem 120 or to access a communication network via communications subsystem 180. The one or more processing devices may include, without limitation, a microprocessor, microcontroller, small board computer, or system on a chip (SoC) (e.g., Qualcomm Snapdragon, Nvidia Tegra, Intel Atom, Samsung Exynos, Apple A7, Motorola X8, etc.). The one or more power supply ports 558 may include, without limitation, one or more USB charging ports, a two-prong or three-prong AC power outlet (e.g., providing current limited AC power at 120 V, 60 Hz), etc.

[0074] User interface subsystem 150 may enhance users' access to communication networks in several ways. In some embodiments, user interface subsystem 150 may provide users access to communication networks (e.g., the Internet) via network module(s) 556. For example, a user may provide inputs via user input device(s) 552 to control a web browser or other network- based application executing on processing device(s) 557, which may access a communication network via network module(s) 556. The data obtained from the communication network may be processed by processing device(s) 557 and provided to the user via output device(s) 554. As another example, a user may connect a computing device (e.g., a mobile computing device) to user interface subsystem 150 via a network module 556 (e.g., a Wi-Fi access point), and access a communication network via another network module 556 (e.g., a mobile network

transceiver), via communications subsystem 180, or via network 126. As yet another example, users may charge mobile computing devices via power supply port(s) 558, and access communication networks through the charged devices.

[0075] In some embodiments, PCS 100 includes an assisted listening unit that transmits the PCS's audio outputs to hearing assistance devices (e.g., hearing aids, Cochlear implants, etc.) within the assisted listening unit's range via a "hearing loop" (e.g., an "audio induction loop" or "audio-frequency induction loop"). The assisted listening unit may include a loop coil and a loop amplifier adapted to drive amplified signals into the loop coil, thereby creating a magnetic field that delivers the amplified signals to hearing assistance devices within the unit's range. The loop coil may be included in or located proximate to user interface subsystem 150, or disposed at another suitable location in, on, or near PCS 100.

[0076] In some embodiments, user interface subsystem 150 includes an interface for adjusting the assisted listening unit (e.g., for increasing or decreasing the signal strength or range of the assisted listening unit). The assisted listening unit's interface may include, without limitation, one or more buttons, dials, switches, and/or software-based interfaces. By adjusting the assisted listening unit, a user may control the range of the assisted listening unit and/or the volume of the audio output provided by the assisted listening unit.

[0077] In some embodiments, user interface subsystem 150 includes interface components for placing a phone call. User interface subsystem may implement the phone calls using voice- over-IP (VOIP) technology. The user's speech may be captured via the user interface subsystem's microphone, and the speech of other parties to the phone call may be provided via the user interface subsystem's speaker(s). In some embodiments, the user interface subsystem 150 permits users to place phone calls to emergency responders (e.g., E911 calls). The E911 calls may be placed using VOIP technology (e.g., via a network module 556 of user interface 150, via communications subsystem 180, or via network 126) or another suitable technology.

[0078] In some embodiments, the user input devices 552 include a microphone system, and the processing device 557 is able to perform noise cancellation on the microphone system. It can be appreciated that the PCS may be located in an environment with high levels of ambient street noise. The processing device 557 may perform a noise cancelling process that distinguishes the user's speech from the background noise and removes at least some of the background noise from the audio stream. When a user plugs in a headset that contains a microphone, the noise cancellation technique may also detect and remove background noise picked up by the headset's microphone.

[0079] FIG. 6 shows an exemplary schematic of the user interface subsystem 150, in accordance with some embodiments. In some embodiments, user interface subsystem 150 includes one or more processing devices 600. The processing device(s) 600 may include, without limitation, a microprocessor, microcontroller, small-board computer, system on a chip (SoC) (e.g., Qualcomm Snapdragon, Nvidia Tegra, Intel Atom, Samsung Exynos, Apple A7, Motorola X8, etc.), or other suitable processing device. The processing device(s) 600 may communicate with other components of PCS 100 via network subsystem 120. In some embodiments, processing device(s) 600 are powered by power distribution subsystem 1 10.

[0080] In the example of FIG. 6, user interface subsystem 150 includes a keypad 601, headset jack 602, speaker 603, two microphones (604, 605), and an E911 button 606, all of which are coupled to the processing device(s) 600. Processing device(s) 600 may be adapted to initiate an E91 1 communication when E911 button 606 is pressed, and to send and receive E91 1 messages via a wireless communication module 607 (e.g., a 3G, 4G, or LTE mobile network transceiver, including a suitable antenna, which may be located proximate to the top of the PCS).

[0081] In some embodiments, the E911 button contains an indicator. One example of the indicator is an illumination ring. The illumination ring may help a user to locate the button at night, and/or may flash when a user presses the button to indicate an E911 call is in progress.

[0082] In the example of FIG. 6, user interface subsystem 150 includes a touchscreen 612, display 614, camera 616, hearing loop coil 618, hearing loop amplifier 619, and USB charging port(s) 620. In some embodiments, the touchscreen 612, display 614, camera 616, and hearing loop coil 618 may be packaged together in a tablet computing device 610. The USB charging port(s) 620 and hearing loop amplifier 619 may be powered by power distribution subsystem 110.

[0083] Returning to FIG. 1, temperature control subsystem 160 controls the temperature within PCS 100. For example, temperature control subsystem 160 may cool the components of PCS 100. Some of the PCS's components generate heat and the PCS 100 may absorb heat from its environment (e.g., via radiation or convection), particularly when the ambient temperature is high or the PCS is exposed to direct sunlight. Extreme heat can interfere with the operation of the PCS or even permanently damage some of the PCS's components.

[0084] Alternatively or in addition, temperature control system 160 may, under appropriate conditions, heat the components of PCS 100. Some PCSs may be located in cold environments (e.g., outdoors in regions with cold ambient temperatures). Like extreme heat, extreme cold can interfere with the PCS's operation or damage its components.

[0085] Temperature control subsystem 160 may include one or more components suitable for heating and/or cooling the PCS. In some embodiments, temperature control subsystem 160 includes one or more fans operable to circulate ambient air through the PCS, which can cool the PCS. In some embodiments, the PCS 100 includes one or more heat sinks, and the ambient air circulated by temperature control subsystem 160 passes proximate to the heat sink(s). In some embodiments, temperature control subsystem 160 includes one or more fans operable to recirculate air in portions (e.g., airtight compartments) of PCS 100, which can facilitate the transfer of heat from those portions of the PCS to other regions of the PCS and/or to the ambient environment. The fans may be single-speed fans or variable-speed fans. In some embodiments, temperature control subsystem 160 includes one or more heaters, which can heat the PCS. In some embodiments, one or more fans and/or heaters are located apart from temperature control subsystem 160, but controlled by the temperature control subsystem.

[0086] Temperature control subsystem 160 may control the PCS's temperature by controlling the operation of the fan(s) and/or heater(s). In some embodiments, temperature control subsystem 160 controls the PCS's temperature based, at least in part, on the temperature inside or in an area proximate to the PCS. Temperature control subsystem 160 may obtain

temperature information regarding the temperature in or near PCS 100 from one or more temperature sensors. The temperature sensors may be located inside the PCS, on an outer surface of the PCS, proximate to the PCS, and/or in any other suitable location. Temperature control subsystem 160 may include one or more sensor drivers that can activate the sensor(s) and obtain temperature measurements from the sensor(s). Alternatively or in addition, temperature control subsystem may obtain temperature information regarding the temperature in the vicinity of the PCS from a suitable source (e.g., a website) via a communication network (e.g., network 126).

[0087] In some embodiments, the temperature control system 160 adds or removes active fans (e.g. switches fans on or off) in specific areas of the PCS based on the temperature sensor information. For example, active fans may be added when the ambient temperature is high (e.g., above a threshold). Conversely, active fans may be removed when the ambient temperature is low (e.g., below a threshold) to reduce power usage. The fans may be organized in addressable groups to facilitate addition and removal of active fans.

[0088] In some embodiments, the temperature control subsystem 160 uses a feedback-based control system (e.g., a feedback loop) to control the speeds of the fans. The fans may include tachometers, and the tachometer outputs may be fed back to the temperature control subsystem, which may use the tachometer outputs to determine the speeds of the fans. In addition to adding and removing active fans, the temperature control subsystem 160 may increase the speeds of the fans as the internal temperature increases or decrease the speeds of the fans as the temperature decreases.

[0089] In some embodiments, the temperature control subsystem 160 uses the fan tachometer output to determine whether a fan fault has occurred. For example, the temperature control subsystem 160 may detect a fan fault when the tachometer output indicates that there is little or no fan rotation (e.g., the rate of fan rotation is below a threshold). When a fan fault is detected, the PCS may notify the maintenance center of the fault, so the PCS can be serviced to replace or repair the faulty fan.

[0090] In some embodiments, temperature control subsystem 160 controls the PCS's temperature based on environmental information, which may include temperature information and/or other information associated with the PCS's environment. For example, environmental information may include sunlight information indicating whether the PCS is exposed to direct sunlight. Sunlight information may be obtained from a camera or other suitable optical sensor. Alternatively or in addition, environmental information may include humidity information indicating the humidity levels in the PCS's environment, time-of-day information indicating the current time at the PCS's location, weather information indicating the weather in the PCS's environment, etc.

[0091] Based on the environmental information, temperature control subsystem 160 may control the fan(s) and/or heater(s) to adjust the PCS's temperature. In some embodiments, temperature control subsystem 160 may activate one or more heaters when the PCS's temperature is below a lower threshold temperature, and/or activate one or more fans when the PCS's temperature is above an upper threshold temperature. In some embodiments, the number of heater units and/or fans activated by temperature control subsystem 160 is determined based on the environmental information. In some embodiments, the settings of the activated heaters and/or fans (e.g., the fan speeds, the heater temperatures, etc.) may be determined based on the environmental information. In some embodiments, if the temperature in the PCS is determined to be outside a safe operating range, temperature control subsystem may instruct power distribution subsystem 110 to deactivate the PCS or at least one component thereof.

[0092] Display subsystem 170 includes one or more display modules, each of which includes at least one display device. The display device may include, without limitation, a liquid crystal display (LCD), light-emitting diode (LED) display, organic light-emitting diode (OLED) display, cathode ray tube (CRT), electroluminescent display (ELD), electronic paper / electronic ink display (e.g., a bi-stable or multi-stable electrophoretic or electro-wetting display), plasma display, thin-film transistor (TFT) display, 3D display (e.g., volumetric display, holographic display, integral imaging display, compressive light field display, etc.), stereoscopic display, etc. In some embodiments, display subsystem 170 includes two display modules disposed on opposite sides of the PCS, such that the modules' display devices face in opposite directions. [0093] A display device may display suitable information, including, without limitation, news information, weather information, emergency information (e.g., instructions for dealing with an emergency, evacuation routes, etc.), travel information (e.g., traffic conditions, road conditions, speed limits, alternative route information, public transit schedules, locations of and/or directions to public transportation facilities, etc.), tourism information (e.g., locations of and/or directions to popular tourist attractions), advertisements, etc. The displayed information may be displayed in one or more suitable formats, including, without limitation, text, still images, and/or video. Display subsystem 170 may include one or more processing devices adapted to control the display of information by the display device(s). For example, each display module may include a processing device adapted to control the display module's display device.

[0094] In some embodiments, display subsystem 170 includes one or more cameras. For example, each display module may include one or more cameras. Display subsystem 170 may use the cameras to determine the ambient light levels, and may adjust the brightness of the display device(s) accordingly. For example, if the ambient light level at the PCS is high (e.g., because the sun is shining on the PCS), display subsystem 170 may increase the brightness of the display(s) (e.g., by increasing the brightness of the display backlight(s)), so that the displayed information is readily viewable by onlookers or passers-by. On the other hand, if the ambient light level at the PCS is low, display subsystem 170 may decrease the brightness of the display(s), to reduce the display subsystem's power usage and/or heat generation. In some embodiments, the brightness levels of the PCS's displays may be controlled independently.

[0095] Alternatively or in addition, display subsystem 170 may use the cameras to obtain information about "potential viewers" (e.g., people viewing the PCS, viewing a display device of the PCS, using the PCS, and/or in the vicinity of the PCS). In some embodiments, display subsystem 170 may determine, based on images of the area proximate to the PCS (e.g., images acquired by the PCS's camera(s)), a potential viewer's apparent demographic information, including, without limitation, age, sex, race/ethnicity, etc. In some embodiments, display subsystem 170 may use facial-recognition techniques to determine a potential viewer's identity.

[0096] Display subsystem 170 may use information about the PCS's potential viewers to select the information to be displayed by the display device(s) (e.g., to select advertisements for display based on the identities or demographics of the potential viewers). Alternatively or in addition, display subsystem 170 may track the identities and/or demographics of the potential viewers who have been in the vicinity of the PCS when particular advertisements have been displayed. Tracking information about potential viewers of advertisements and/or controlling the display of advertisements based on information about the potential viewers may increase the value of the PCS's advertising impressions to potential advertisers.

[0097] Display subsystem 170 may obtain information about a potential viewer from the potential viewer, from analysis of images of the potential viewer, and/or from the potential viewer's computing device (e.g., smartphone). For example, a potential viewer who connects to a communication network through a PCS 100 (e.g., via user interface subsystem 150 or via the user's computing device) may provide authentication data (e.g., a username, password, and/or other credentials), and the PCS may use that authentication data to access the potential viewer's account information, which may identify the potential viewer and/or provide information about the potential viewer (e.g., the potential viewer's attributes and/or interests). The potential viewer may have provided such information when registering for access to the PCS (or set of PCSs), or the PCS may have inferred such information based on the potential viewer's activities on the communication network.

[0098] Even if potential viewers do not register for PCS access, information about a potential viewer's attributes and/or interests can still be inferred based on the potential viewer's activities, and this information can be tracked in connection with information identifying the potential viewer's computing device (e.g., a mobile device's phone number, mobile equipment identifier (MEID), or unique device identifier (UDID); a computing device's media access control (MAC) address; etc.). In some embodiments, a PCS 100 may identify a potential viewer or attributes thereof based on identifying information transmitted by the potential viewer's computing device when the computing device is within range of the PCS, even if the computing device is not connected to a network via the PCS 100.

[0099] FIG. 7 is a schematic of a display module 700, in accordance with some embodiments. In some embodiments, a PCS 100 includes two display modules 700. In some embodiments, a display module 700 includes one or more processing device(s) 710. Each processing device 710 may include, without limitation, a microprocessor, microcontroller, small-board computer, system on a chip (SoC) (e.g., Qualcomm Snapdragon, Nvidia Tegra, Intel Atom, Samsung Exynos, Apple A7, Motorola X8, etc.), or other suitable processing device. The processing device(s) 710 may communicate with other components of PCS 100 via network subsystem 120. In some embodiments, each processing device 710 is powered by power distribution subsystem 110. In the example of FIG. 7, display module700 also includes a display device 720. Display device 720 may include a display panel 721, ambient light sensor 722, two cameras (723, 724), temperature sensor 725, frame rate controller 726, power/backlight controller 727, and one or more fans 728.

[00100] In some embodiments, the processing device 710 is able to read the ambient light sensor 722 and send a control signal to the power/backlight controller 727. One example of the control signal is a pulse width modulated (PWM) output. In response to the ambient light sensor 722 detecting the presence of high ambient light, the duty cycle of the PWM signal may be increased, thereby causing the power/backlight controller to increase the backlight brightness, so that the display image is viewable in bright sunlight. Those skilled in the art can appreciate that the PWM control signal may be digital or converted to an analog output via a digital to analog converter.

[00101] Returning to FIG. 1, communications subsystem 180 includes one or more

communication modules. In some embodiments, the communication module(s) include one or more radio access nodes. The radio access node(s) may include small cells (e.g., low-power radio access nodes with ranges between roughly 10 m and 1-2 km, including, but not limited to, femtocells, picocells, and microcells), macrocells (e.g., radio access nodes with ranges of up to a few tens of kilometers), etc. The radio access node(s) may reduce congestion in mobile data networks (e.g., 3G, 4G, or LTE networks) by expanding network capacity and offloading traffic from more congested portions of the network to the portions of the network associated with the radio access node(s). In areas where mobile data networks are highly congested (e.g., portions of New York City, and particularly portions of Manhattan), deploying PCSs with radio access node(s) in an area where mobile data networks are congested may, in some embodiments, greatly reduce network congestion and improve quality of service for many network users.

[00102] In some embodiments, communications subsystem 180 includes at least one wireless access point. Computing devices may connect to the wireless access point using a suitable wireless adapter, including, without limitation, a Wi-Fi or WiMAX adapter. Through the wireless access point, communications subsystem 180 may provide access to a local area network (LAN) or wide area network (WAN) (e.g., network 126, or a 3G, 4G, or LTE network accessed via the communications subsystem's radio access node(s)). PCS operators may use the wireless access points to provide wireless broadband network access to individuals, subscribers, communities, etc. Use of the wireless access points may further improve the quality of service on mobile data networks by offloading some users from the mobile data networks to the wireless access point.

[00103] Returning to FIG. 1, mounting subsystem 190 includes a mounting device that releasably secures the PCS to a support (e.g., a footing). The mounting device may be adapted to break when a shear force above a predetermined value is applied to the mounting device, thereby allowing the PCS to move. Such releasable mounting can reduce the damage caused to people and property when an automobile collides with the PCS.

[00104] PCS 100 may include compartments and components of PCS 100 may be disposed in the compartments. FIG. 8 illustrates an arrangement of compartments of a PCS 100, according to some embodiments. For convenience, the PCS's top portion 805 and base portion 806 are identified in FIG. 8, as is the PCS's height 807.

[00105] In the example of FIG. 8, PCS 100 includes mounting compartment 890, electronics compartment 840, user interface compartment 850, air intake compartment 865, display compartment 870, and communications compartment 880. Electronics compartment 840 may enclose electronics subsystem 140. User interface compartment 850, display compartment 870, and communications compartment 880 may enclose user interface subsystem 150, display subsystem 170, and communications subsystem 180, respectively. In some embodiments, display compartment 870 may enclose, in addition to display subsystem 870, one or more heat sinks. Mounting compartment 890 may enclose at least a portion of a mounting subsystem 190.

[00106] Air intake compartment 865 may enclose at least portions of temperature control subsystem 160. In some embodiments, air intake compartment 865 may enclose one or more fans, which may draw ambient air into the air intake area. In some embodiments, the one or more fans may also draw air into the air intake area from electronics compartment 840. The fans may move the air through display compartment 870 (e.g., across one or more heat sinks), and the air may be discharged through an exhaust in communications compartment 880. In some embodiments, air intake compartment 865 may enclose one or more heaters.

[00107] In the example of FIG. 8, communications compartment 880 is located proximate to the top 805 of the PCS, display compartment 870 is disposed along an upper portion of the PCS and below communications compartment 880, and an air intake compartment 865 is located proximate to a middle portion of the PCS (in the direction of the PCS's height) and below display compartment 870. Mounting compartment 890 is located proximate a base 806 of the PCS, electronics compartment 840 is disposed along a lower portion of the PCS between mounting compartment 890 and air intake compartment 865, and user interface compartment 850 is disposed along a lower portion of the PCS adjacent to air intake compartment 865 and electronics compartment 840.

[00108] Embodiments of a PCS are not limited by the compartmentalization scheme illustrated in FIG. 8. A PCS may include none of the compartments illustrated in FIG. 8, any combination of the compartments illustrated in FIG. 8, and/or other compartments not illustrated in FIG. 8. In cases where a PCS includes a compartment illustrated in FIG. 8 (e.g., mounting

compartment 890, electronics compartment 840, user interface compartment 850, air intake compartment 865, display compartment 870, or communications compartment 880), the location and/or shape of that compartment may differ from the location and/or shape of the corresponding compartment in FIG. 8. In some embodiments, a PCS may include a compartment that encloses two or more PCS subsystems that are enclosed by different compartments in the example of FIG. 8. In some embodiments, a PCS may include separate compartments enclosing respective portions of a PCS subsystem that is enclosed by a single compartment in the example of FIG. 8. In some embodiments, a PCS may include a compartment that encloses other compartments.

[00109] FIGS. 9A, 9B, and 9C show respective front perspective, side, and exploded front perspective views of a PCS 100, in accordance with some embodiments. For convenience, the PCS's top portion 805 and base portion 806 are identified in FIGS. 9A-9B, as are the PCS's height 807, width 908, and length 909.

[00110] As can be seen in FIG. 9C, PCS 100 may include a frame 1000. The frame 1000 is (or is part of) a structural system that supports the components of PCS 100. In some embodiments, the frame 1000 forms portions of the PCS's compartments (e.g., communications compartment 880, display compartment 870, air intake compartment 865, user interface compartment 850, electronics compartment 840, and mounting compartment 890).

[00111] As can further be seen in FIG. 9C, communications compartment 880 may include a radio access node 981, a wireless access point 983, and/or one or more antennas. The bottom of communications compartment 880 may be formed by a portion of frame 1000, and the top and sides of communications compartment 880 may be formed by a removable cap 985.

[00112] Display compartment 870 may include a heat sink 903 and a display module 700. In some embodiments, display compartment 870 includes a second display module (and, optionally, a second heat sink) arranged back-to-back (e.g., in parallel) with display module 700 and heat sink 903, such that display module 700 and the second display module face in opposite directions.

[00113] Air intake compartment 865 may include an air intake assembly 967. The air intake assembly 967 may include a grill, a filter, and a fan assembly. User interface compartment 850 may include a user interface device 951. The user interface device 951 may include a table computer, keypad, an emergency call button, microphone(s), speakers, and a mobile device charging port. Electronics compartment 840 may include an electronics cabinet 941, and may be formed by portions of frame 1000 and a cover panel 943. Mounting compartment 890 may at least partially enclose mounting subsystem 190, and may be formed by portions of frame 1000 and a cover panel 991.

[00114] FIGS. 1 OA- IOC show the frame 1000 of a PCS 100, according to some embodiments, and illustrate how the frame 1000 partially forms the PCS's compartments. In some embodiments, the frame 1000 is the frame of a monocoque structure, wherein the frame supports the components, forms the compartments and is also the outer face (or "skin") of portions of the PCS (e.g., the user interface compartment 850 and the opposing side 1050 of the PCS). This approach may simplify construction by reducing the number of brackets, mounting accessories, part count, etc.

[00115] In another embodiment, the frame 1000 is that of a traditional structure, and the outer skins are attached to the frame. In such embodiments, the frame supports the components of the PCS, forms the compartments of the PCS, and acts as a rigid structural chassis. One advantage of this approach is field replaceability. If an outer skin is damaged (e.g., by vandalism or by ordinary wear and tear), the damaged skin can be replaced with a new skin. As long as the frame remains uncompromised, damaged outer skins can be removed, replaced, and

(optionally) sent to a service facility for refurbishing. Refurbishing methods may include removing dents and/or scratches, sanding, texturing, reshaping, and/or re-painting. Skins that are not suitable for refurbishing (e.g., due to extensive damage) may be recycled and turned into new parts.

[00116] As can be seen in FIGS. lOA-lOC, frame 1000 may include a bottom member 1001a, a lower front member 1001b, a cross-frame member 1001c, an upper front member lOOld, a rear member lOOle, and a top member lOOlf. In the example of FIGS. lOA-lOC, lower portions of lower front member 1001b and rear member lOOle are joined to opposite sides of bottom member 1001a. One side of cross-frame member 1001c is joined to an upper portion of lower front member 1001b and a lower portion of upper front member l OOl d. The opposite side of cross-frame member 1001 c is joined to rear member l OOl e proximate to a midpoint between the rear member's top and base ends. The upper portions of upper front member 100 I d and rear member l OOle are joined to opposite sides of top member 100 If

[00117] In the example of FIGS. lOA-l OC, top member l OOlf and the upper portion of upper front member 100 Id form a bottom and a side of communications compartment 880. Two sides of display compartment 870 are formed by upper front member lOOld and rear member lOOl e, and the top and bottom of display compartment 870 are formed by top member l OOlf and cross-frame member 1001 c, respectively. Cross-frame member 1001c forms the top, bottom, and two sides of air intake compartment 865. User interface compartment 850 is formed in part by the bottom portion of upper front member 100 Id, the top portion of lower front member 1001b, and a side of cross-frame member 1001 c. Two sides of electronics compartment 840 are formed by lower front member 1001b and the lower portion of rear member lOOl e, and the top and bottom of electronics compartment 840 are formed by cross-frame member 1001 c and bottom member 1001a, respectively. Bottom member 1001a forms mounting compartment 890.

[00118] Embodiments of frame 1000 are not limited by the configuration shown in FIGS. 10A- 10C. As can be seen in FIG. 1 1, which shows a front-perspective view of a portion of PCS 100, some embodiments of frame 1000 further include one or more cross-frame members lOOlg coupled to upper front member 100 I d and an upper portion of rear member l OOl e to form an I- beam. In some embodiments, cross-frame member(s) l OOlg may include one or more ribbed heat sinks 1161. A ribbed heat sink 1 161 may include a substantially planar member 1 163 and fins 1162 extending from the substantially planar member 1163 (e.g., in one or more directions substantially perpendicular to the surface of the substantially planar member).

[00119] Frame 1000 may facilitate cooling of the PCS's compartments. In some embodiments, one or more (e.g., all) members of frame 1000 may have relatively high thermal conductivity (e.g., average thermal conductivity of at least 90, 100, 110, or 120 Btu / (hr * °F * ft)). When the temperature within a PCS compartment is greater than the ambient temperature in the area proximate to the PCS, the frame member(s) with relatively high thermal conductivity may function as heat sinks (including, but not limited to, cross-frame member(s) l OOlg), such that heat from the compartments is transferred to the PCS's ambient environment through the frame member(s). The member(s) of frame 1000 with relatively high thermal conductivity may substantially consist of materials with relatively high thermal conductivity, including, without limitation, aluminum, thermal pyrolytic graphite, silicon carbide, etc. For example, one or more member(s) of frame 1000 may substantially consist of aluminum.

[00120] Members of frame 1000 may be manufactured using suitable techniques. In some embodiments, bottom member 1001a, lower front member 1001b, cross-frame member 1001c, cross-frame member(s) lOOlg, and/or top member lOOlf may be metal castings. In some embodiments, upper front member 100 Id and/or rear member lOOle may be extruded metal, polymer, composite, etc.

[00121] Referring to FIGS. 12A-12C, portions of a PCS's frame 1000 and/or compartments may be covered by ribbed panels 1200. The ribbed panels 1200 may discourage vandalism of PCS 100, since the panel ribs might offer a less appealing target for drawing, painting, or etching than other, smoother surfaces. In addition, the ribbed panels may be swappable, as shown in FIG. 12B, such that a damaged or vandalized panel could be quickly replaced with a pristine panel.

[00122] Referring to FIG. 12C, a ribbed panel 1200 may include a substantially planar member 1202 and a set of ribs 1204 extending from the planar member. In some embodiments, the angle 1206 between the outer surface of a rib and the outer surface of the planar member is between approximately 95° and 115°. In some embodiments, the thickness 1208 of a rib 1204 at the rib's base may be between approximately 0.25" and 0.5", and the width 1210 of a rib 1204 may be between approximately 0.3" and 0.6". Other dimensions may be used.

Controlling Access to Components of a PCS

[00123] In some embodiments, one or more of the compartments of a personal communication structure (PCS) 100 may be secured. Securing a PCS's compartments may protect the PCS's components from vandalism, theft, and damage (e.g., from unwanted handling or exposure to the ambient environment), protect people from safety hazards (e.g., electrical hazards), and/or prevent unauthorized parties from accessing the PCS's components.

[00124] Nevertheless, from time to time it may be necessary or desirable for authorized parties to access the components enclosed in a PCS's compartments. For example, it may be desirable for an authorized party to access a PCS subsystem to perform maintenance, to perform tests, to repair or replace a component, to adjust a component's settings, etc. In some cases, it may be desirable for one party to have access to one set of PCS components and for another party to have access to another set of PCS components, without either party having access to both sets of components. More generally, it may be desirable for different parties to have access only to specified subsets of the PCS 's components. For example, it may be desirable for an

electricians' union to have access to the PCS's power distribution subsystem 110, so that the union's electricians can maintain or repair the power distribution subsystem, but there may be no reason for the electricians to have access to any other PCS components. Likewise, it may be desirable for a telecommunications company's personnel to have access to the PCS's communications subsystem 180, but there may be no reason for the company's personnel to have access to any other PCS components.

[00125] FIG. 13 illustrates a system 1300 for controlling access to components of a PCS, according to some embodiments. Access-control system 1300 may independently secure at least a subset of the compartments of a PCS 100 (e.g., access-control system 1300 may apply different security measures to different compartments in the subset, which may include requiring users to provide different authentication tokens and/or information to access different compartments in the subset). The independently secured compartments may be independently accessible (e.g., the interior of any compartment in the subset may be accessed without accessing the interiors of other compartments in the subset). Providing independently secured and independently accessible compartments may facilitate the task of maintaining overall security, while granting different parties access to different sets of PCS components. Some techniques for securing and controlling access to the PCS's compartments are described in further detail below.

[00126] In some embodiments, access-control system 1300 includes one or more compartment locks (e.g., locks 1302a-f) and one or more compartment access members (e.g., access members 1304a-f) associated with one or more respective compartments (e.g., electronics compartment 840, air intake compartment 865, display compartment 870, communications compartment 880, mounting compartment 890, and user interface compartment 850). When a compartment lock 1302 is engaged, the lock fastens or otherwise secures the corresponding access member 1304 in a closed position, such that the interior of the corresponding compartment is inaccessible. When a compartment lock 1302 is disengaged, the corresponding access member 1304 is movable between the closed position and an open position, such that the corresponding compartment is accessible.

[00127] The compartment locks 1302 may include, without limitation, mechanical locks, electronic locks, electromechanical locks, etc. Non-limiting examples of mechanical locks include warded locks, tumbler locks (e.g., pin tumbler locks, wafer tumbler locks, disc tumbler locks, lever tumbler locks), combination locks, security fasteners (e.g., "security" or "tamper- proof screws, bolts, anchors, nuts), etc. A security fastener may have an atypical shape and/or atypical dimensions relative to commercially available fasteners of the same type. For example, as can be seen in FIG. 14, a security fastener 1400 may be a machine screw 1402 with an atypical screw drive 1404 or head configuration. A security fastener can generally be unlocked or unfastened using a specialized tool that conforms to or otherwise accommodates the fastener's atypical shape and/or dimensions. Other mechanical locks can generally be opened with physical keys or a combination code.

[00128] Non-limiting examples of electronic or electromechanical locks include key card locks, RFID locks, smart locks, cyber locks, etc. A key card lock can generally be unlocked by presenting a suitable security token (e.g., a key card with appropriate key data) to a key card reader. Likewise, an RFID lock can generally be unlocked by presenting a suitable security token (e.g., an RFID tag with appropriate key data) to an RFID reader. A smart lock can generally be unlocked by presenting suitable authentication data to an access controller 1310, which confirms the validity of the authentication data and disengages the lock. Non-limiting examples of authentication data include biometric data (e.g., fingerprint data, retinal scan data, voice print data or other speech-based data, etc.), security credentials (e.g., username, password, personal identification number (PIN), etc.) cryptographic data, etc.

[00129] A cyber lock generally includes an electronic cylinder that can be unlocked by inserting a suitable cyber key. A cyber key is generally an electronic key that can communicate with a cyber lock to engage and disengage the cyber lock's cylinder. In some cases, a cyber key may provide power to the cyber lock. In some cases, a cyber key may contain internal memory that stores security information, which may include but is not limited to: one or more encrypted access codes, information identifying one or more PCS structures the key can access, dates and times when the key is authorized to access a particular PCS or set of PCSs, and/or date/time ranges when the key is authorized to access a particular PCS or set of PCSs. In some cases, a cyber key may be capable of disabling access to the security information and/or deleting the security information in response to input signals (e.g., input signals received wirelessly from a remote service center, indicating that the key has been lost or stolen). A cyber key's security information (e.g., schedules, credentials, authorizations, permissions, etc.) generally may be updated using wireless communications (e.g., Bluetooth and/or Wi-Fi) when connected to an authorized network. In some embodiments, a cyber key associated with a PCS 100 may connect to an authorized network through the PCS 100 (e.g., via the communications subsystem 180). Some of the above examples of cyber keys may contain an internal rechargeable battery that powers the cyber lock when the key is inserted into the lock. In some cases, a cyber key may communicate with a cyber lock (e.g., when the key is inserted into the lock). Such

communication may occur wirelessly or via a wired connection (e.g., a USB interface).

[00130] Some examples of commercially available electronic or electromechanical locks include electromagnetic locks, electric latch releases, electronically-actuated deadbolts, motorized locks and solenoid locks.

[00131] In some embodiments, an electronic or electromechanical lock includes a locking mechanism and an actuator. Non-limiting examples of locking mechanisms include deadbolts, latches, electromagnets, etc. Non-limiting examples of actuators include solenoid drivers, rotary actuators, linear actuators (e.g., a linear actuator that moves a deadbolt or unlatches a latch), electromagnets, cams, levers, etc.

[00132] Returning to FIG. 13, access-control system 1300 may include an access controller 1310 and a security interface 1320. In some embodiments, access controller 1310 controls one or more actuators for one or more compartments, and uses the appropriate actuator to disengage a corresponding lock 1302 and/or open a corresponding access member 1304 upon provision of suitable authentication data. For example, when a user provides the appropriate authentication data for display compartment 870, access controller 1310 may drive an actuator to disengage lock 1302c, and (optionally) open compartment 870 by driving an actuator to move access member 1304c. In some embodiments, the authentication data is provided to access controller 1310 by security interface 1320 (e.g., via network subsystem 120). In some embodiments, authentication data is provided to access controller 1310 over a communication network (e.g., via network subsystem 120 and/or communication subsystem 180).

[00133] In some embodiments, access controller 1310 includes one or more processing devices 1510 and one or more actuator drivers 1520, as shown in FIG. 15. The processing device(s) 1510 and actuator driver(s) 1520 may be powered by power distribution subsystem 110.

Processing device(s) 1510 may include, without limitation, a microprocessor, microcontroller, small-board computer, system on a chip (SoC) (e.g., Qualcomm Snapdragon, Nvidia Tegra, Intel Atom, Samsung Exynos, Apple A7, Motorola X8, etc.), or other suitable processing device. [00134] Actuator driver(s) 1520 may include hardware (e.g., I/O ports) and/or software (e.g., driver software) controlled by processing device(s) 1510 and adapted to communicate with actuators (e.g., the actuators of locks 1302 and/or access members 1304). In some

embodiments, access controller 1310 engages a lock 1302 and/or disengages a lock 1302 by sending suitable control signals to the lock's actuator via an actuator driver 1520. In some embodiments, access controller 1310 opens an access member 1304 and/or closes an access member 1304 by sending suitable control signals to the access member's actuator via an actuator driver 1520. In some embodiments, access controller 1310 determines whether a lock 1302 is engaged or disengaged, or determines whether an access member 1304 is open or closed, by sending a suitable query to the corresponding actuator, which may reply to the query by sending data to processing device(s) 1510 indicating the actuator's state. In some embodiments, when access controller 1310 detects closure of a compartment's access member 1304, access controller 1310 may engage the compartment's lock 1302.

[00135] An embodiment has been described in which access controller 1310 includes one or more processing device(s) 1510. In some embodiments, access controller 1310 is implemented on one or more processing devices of a subsystem of PCS 100. Access controller 1310 may, for example, be implemented on the maintenance subsystem's processing device(s) 600, which may be equipped with suitable actuator driver(s) 1520.

[00136] A user may provide authentication data to access controller 1310 via security interface 1320. Security interface 1320 may include a key card reader, RFID reader, keyboard, keypad, touchscreen, fingerprint scanner, retinal scanner, camera, microphone, data access port, and/or other suitable data input device. The key card reader and RFID reader can be used to read authentication data from a key card and an RFID tag, respectively. The keyboard, keypad, or touchscreen can be used to enter security credentials. The fingerprint scanner, retinal scanner, camera, or microphone may be used to enter biometric data. The data access port may be used to upload authentication data, including but not limited to cryptographic keys. In the example of FIG. 15, security interface 1320 is configured to send the user-provided authentication data to access controller 1310 via network subsystem 120. In some embodiments, security interface 1320 includes a processing device adapted to encrypt the user-provided authentication data before sending the data to access controller 1310. In some embodiments, security interface

1320 sends the authentication data to access controller 1310 via a dedicated link that is not part of network subsystem 120. Alternatively or in addition, a user may provide authentication data to access controller 1310 over a communication network (e.g., network 126, or a network coupled to communication subsystem 180).

[00137] Access controller 1310 may analyze the user-provided authentication data to determine whether it is valid. In some embodiments, the user specifies which compartment(s) the user is attempting to access and access controller 1310 analyzes the authentication data to determine whether it is valid for the specified compartment(s). In some embodiments, the user provides authentication data without specifying which compartment(s) the user is attempting to access and access controller 1310 analyzes the authentication data to determine whether it is valid for any compartment. To determine whether the authentication data is valid, access controller 1310 may perform one or more suitable authentication procedures (e.g., fingerprint matching, voiceprint matching, retinal scan matching, username matching, password matching, PIN matching, one-factor authentication, two-factor authentication, multi-factor authentication, etc.).

[00138] In some embodiments, permission to access a compartment of the PCS 100 may be remotely granted, denied, or revoked (e.g., by a remote service center), and the grant, denial, or revocation of permission to access the compartment may be communicated to the access controller 1310 over a communication network (e.g., network 126, a network coupled to communication subsystem 180, etc.). In some embodiments, the access controller may acknowledge the grant, denial, or revocation of permission over the communication network.

[00139] The entity that grants, denies, or revokes permission to access a compartment of the PCS 100 may determine whether to grant, deny, or revoke permission based on any suitable information. In some embodiments, the entity grants permission to access a compartment during predetermined time periods. For example, the entity may grant permission to access a compartment during time periods specified by repair or maintenance schedules for components located in the compartment. As another example, the entity may deny access to the display compartment 870 for display subsystem 170 maintenance except during periods generally characterized by low pedestrian foot traffic, such as early morning hours. It can be appreciated that during periods of high pedestrian foot traffic, it is desirable for the display subsystem 170 to be showing advertisements. In some embodiments, the maintenance subsystem 130 may communicate with the entity (e.g., a remote service center). For example, the maintenance subsystem 130 may indicate to the entity whether (or when) maintenance or repair of a PCS component or subsystem is recommended or permitted. In some embodiments, the entity grants permission to access a compartment based on communication from the maintenance subsystem indicating that repair or maintenance of a component or subsystem in the compartment is recommended or permitted. For example, the maintenance subsystem 130 may indicate that repair or replacement of a PCS component in a compartment is recommended in response to administering a diagnostic test (e.g., a self-test) and detecting a fault. In some embodiments, the PCS 100 may send user-provided authentication data to the entity, which may determine whether the authentication data is valid for one or more compartments and grant permission to access the compartment(s) if the authentication data is determined to be valid.

[00140] In some embodiments, the PCS 100 may implement two-factor access control based on (1) user-provided authentication data and/or items (e.g., security tokens, keys, etc.) and (2) a grant, denial, or revocation of permission to access a compartment. When two-factor access control is used, the grant, denial, or revocation of permission to access a compartment may function as a grant, denial, or revocation of permission to allow authorized access to the compartment. When authorized access to a compartment is permitted, the access controller 1310 may allow users who provide valid authentication data/item(s) for the compartment to access the interior of the compartment. When authorized access to a compartment is not permitted, the access controller 1310 may not allow a user to access the interior of the compartment, even if the user provides valid authentication data/item(s) for the compartment. In other words, the PCS 100 may permit a user to access a PCS compartment if the user provides suitable authentication data/item(s) and a remote entity grants permission to access the compartment, but not if the authentication data/item(s) are unsuitable nor if the remote entity denies or revokes permission. For example, if a user provides compromised authentication data/item(s) (e.g., stolen authentication data or a lost/stolen key), the remote entity may determine that the authentication data/item(s) are compromised, deny permission to access the compartment, and instruct the access controller 1310 to revoke the user's privileges to access one or more compartments by disabling authentication data/item(s) assigned to or in the possession of the user.

[00141] In embodiments of the PCS 100 that implement two-factor access control, steps of the access control process may be performed in parallel and/or in any suitable sequence. In some embodiments, access controller 1310 may send a message to a remote entity (e.g., service center) requesting permission to allow authorized access to a compartment, and the remote entity may then reply with a grant or denial of permission to allow authorized access to the compartment. The access controller 1310 may send such a request before a user provides authentication data/item(s) for the compartment, after the user provides the authentication data/item(s) but before the authentication data/item(s) are validated, or after the user-provided authentication data/item(s) are validated. In some embodiments, a request to access a compartment is sent to the remote entity before a user attempts to gain access to the compartment (e.g., by providing authentication data/item(s)). After permission to allow authorized access to the compartment has been received by the PCS 100 (and before such permission has been revoked), a user may gain access to the compartment by providing suitable authentication data/item(s).

[00142] In some embodiments, the access controller 1310 provides an indication that permission to access a compartment (or permission to allow authorized access to a

compartment) has been granted. For example, when access permission has been granted (and not revoked), the access controller 1310 may illuminate a light-emitting diode (e.g., a green LED) to indicate that access (e.g., authorized access) to the compartment is permitted. The indicator may be disposed in any suitable location, including, but not limited to, on the corresponding compartment or on an electronic key provided by the user. In some

embodiments, the access controller 1310 may activate an indicator on a key wirelessly (e.g., over a wireless network) or via a wired connection (e.g., when the key is inserted into an interface connector or lock).

[00143] In some embodiments, the PCS 100 may implement single-factor access control based on user-provided authentication data/item(s) or on a grant, denial, or revocation of permission to access a compartment. For example, the access controller 1310 may open or unlock a compartment in response to receiving a grant of permission to access the compartment, without requiring the user to provide authentication data/item(s). In some embodiments, a user may transmit a code to a remote entity (e.g., by emailing the code to an email address associated with the entity, by sending a text message to a phone number associated with the entity, etc.), and, after validating the code, the entity may grant permission to access the compartment. In some embodiments, the user may transmit the code via a mobile device that wirelessly connects to a network through the PCS 100 (e.g., through an access node of the PCS 100). In some embodiments, the entity identifies a compartment of the PCS 100 and determines whether to grant permission to access the compartment based on the transmitted code, the email address / phone number to which the code was transmitted, and/or the email address / phone number from which the code was sent. In some embodiments, the entity may use an automated process to grant permission to access a compartment.

[00144] Access controller 1310 may detect and respond to attempts to gain unauthorized access to compartment(s) of PCS 100. In some embodiments, access controller 1310 determines that a user is attempting to gain unauthorized access to a PCS compartment if invalid authentication data is provided in more than N consecutive authentication attempts, where N is a predetermined number. In some embodiments, access controller 1310 determines that a user is attempting to gain unauthorized access to a PCS compartment (or has gained unauthorized access) if access controller 1310 detects disengagement of the compartment's lock or opening of the compartment's access member without a corresponding entry of the compartment's authentication data.

[00145] When unauthorized access (or an attempt to gain unauthorized access) to a PCS compartment is detected, access controller 1310 may take remedial action. In some embodiments, access controller 1310 collects evidence of the unauthorized access (or attempt) by activating a camera to acquire one or more images (e.g., still images or video) of a region proximate to the PCS. The acquired images may include images of the user who has accessed (or attempted to access) the PCS. In some embodiments, access controller 1310 sounds an alarm, displays a message via display subsystem 170, initiates communication with a security provider, and/or performs other suitable actions to draw attention and/or alert interested parties to the unauthorized access. In some embodiments, when unauthorized access to one or more compartments is detected, the access controller silently alerts a remote security center (e.g., alerts the remote security center without alerting the user), which in turn takes action based on the unauthorized access. Depending on which compartment is accessed, the security center may, for example, deploy security personnel or alert the local police.

[00146] FIG. 16 shows a perspective view of electronics compartment 840, according to some embodiments. In some embodiments, cover panel 943 functions as access member 1304a for electronics compartment 840. In some embodiments, the lock 1302a for electronics compartment 840 includes a set of latches 1604 and a corresponding set of latch receptacles 1606. When the lock is engaged, the interlocking of the latches 1604 and the latch receptacles 1606 holds the access member securely in the closed position. The lock may be disengaged by access controller 1310, which may drive one or more actuators coupled to the latch receptacles 1606 to release the latches 1604 or vice versa, thereby allowing the access member to be moved from the closed position (e.g., a position in which the interior of the compartment is inaccessible, such as the position of cover panel 943 in FIG. 9A) to the open position (e.g., a position in which the interior of the compartment is accessible, such as the position of cover panel 943 in FIG. 16). The cover panel 943 may be hinged and/or removable.

[00147] As can be seen in FIG. 16, electronics compartment 840 may enclose an electronics cabinet 941. FIGS. 17A and 17B show front perspective and rear perspective views of the electronics cabinet 941, according to some embodiments. Electronics cabinet 941 may include three sub-compartments 1710, 1720, and 1730. Sub-compartments 1710, 1720, and 1730 (or a subset thereof) may be independently secured and independently accessible. In some embodiments, sub-compartments 1710, 1720, and 1730 enclose, respectively, power distribution subsystem 110, network subsystem 120, and maintenance subsystem 130. In some embodiments, the power distribution subsystem 110 and the network subsystem 120 may be located on the same side of the electronics cabinet 941 (e.g., with the power distribution subsystem 110 located between the base of the PCS 100 and the network subsystem 120), and the maintenance subsystem 130 may be located on the opposite side of the electronics cabinet 941. In some embodiments, sub-compartment 1720 encloses network subsystem 120, and sub- compartments 1710 and 1730 collectively enclose power distribution subsystem 110 and maintenance subsystem 130 (e.g., portions of the power distribution subsystem 110 and/or portions of the maintenance subsystem 130 may be located in both the sub-compartment 1710 and the sub-compartment 1730).

[00148] In some embodiments, electronics compartment 840 may not enclose an electronics cabinet 941. Electronics compartment 840 may enclose electronics subsystem 140 without partitioning subsystems 110, 120, and 130 into sub-compartments.

[00149] An embodiment has been described in which an electronics compartment 840 encloses three sub-compartments 1710, 1720, and 1730, which in turn enclose power distribution subsystem 110, network subsystem 120, and maintenance subsystem 130. In some embodiments, PCS 100 may not include an electronics compartment 840 enclosing multiple compartments. Instead, PCS 100 may include three compartments which respectively enclose subsystems 110, 120 and 130.

[00150] FIGS. 18A and 18B show front perspective and exploded front perspective views, respectively, of an air intake assembly 967, according to some embodiments. Air intake assembly 967 may be enclosed in air intake compartment 865 and may implement a portion of temperature control subsystem 160. In some embodiments, air intake assembly 967 includes a grill 1802, a filter 1806, and a fan assembly 1804. The grill 1802 may function as access member 1304b, and may be secured to the PCS by security fasteners 1808, which may function as lock 1302b. Thus, lock 1302b may be engaged by using security fasteners 1808 to fasten grill 1802 to the PCS. According to some embodiments, the closed and open positions of access member 1304b (e.g., grill 1802 of air intake assembly 967) are illustrated in FIG. 9A and FIG. 18A, respectively. In some embodiments, air intake compartment 865 may enclose two air intake assemblies 967 disposed proximate to each other, on opposite sides of PCS 100.

[00151] FIGS. 19A and 19B show front perspective and rear perspective views, respectively, of a user interface device 951, according to some embodiments. User interface device 951 may be partially enclosed in user interface compartment 850 and may implement a user interface subsystem 150. In some embodiments, user interface device 951 includes a user interface panel 1902 and a tablet computer 1900 fastened to the user interface panel 1902 by security fasteners 1904. In some embodiments, the security fasteners are accessible via the interior of air intake compartment 865, but not accessible from the exterior of the PCS 100. Thus, in some embodiments, the lock 1302f and access member 1304f for user interface compartment 850 may include, respectively, the lock 1302b and the access member 1304b for air intake compartment 865.

[00152] FIG. 20 shows a perspective view of a display compartment 870, according to some embodiments. In some embodiments, display compartment 870 includes a display module 700 and a heat sink 903. In some embodiments, display compartment 870 includes a second display module (and, optionally, a second heat sink) arranged back-to-back with display module 700 and heat sink 903, such that display module 700 and the second display module face outwardly in opposite directions.

[00153] FIG. 21 shows an exploded perspective view of a display module 700, according to some embodiments. In some embodiments, display module 700 includes a housing and a display panel 2104. The housing may include a housing frame 2102, a covering frame 2106, and a transparent covering 2108. Display module 700 may be assembled by positioning display panel 2104 in cavity 2110, fastening the display panel to housing frame 2102, and using covering frame 2106 to secure transparent covering 2108 over display panel 2104. Transparent covering 2108 may include toughened glass (e.g., "Gorilla Glass" ® manufactured by Corning, Inc.). In some embodiments, the assembled display module 700 functions as the access member 1304c for display compartment 870. FIG. 9A shows access member 1304c (display module 700) in the closed position, and FIG. 20 shows the access member in the open or service position.

[00154] FIG. 22 shows a cut-away perspective view of compartment lock 1302c of display compartment 870, according to some embodiments. In some embodiments, compartment lock 1302c includes a connector 2202 (e.g., a pin) coupled to the housing of display module 700, and a mating interlocking connector 2204 (e.g., an L-shaped receptacle) formed in a retention member 2208 of PCS 100. FIG. 22 also shows an actuator 2206. In some embodiments, actuator 2206 is operable to disengage lock 1302c by moving retention member 2208 such that connector 2202 is released from mating interlocking connector 2204 (e.g., moving retention member 2208 toward the PCS's base). The operation of compartment lock 1302c and actuator 2206 are described in more detail below, with reference to FIGS. 23 A and 23B.

[00155] FIG. 23A shows a cross-sectional view of compartment lock 1302c of display compartment 870 with the lock engaged and the access member (display module 700) in the closed position, according to some embodiments. In some embodiments, lock 1302c is engaged by positioning connector 2202 within mating interlocking connector 2204, such that mating interlocking connector 2204 prevents connector 2202 from moving laterally. As can be seen, when lock 1302c is engaged, display module 700 is held in the closed position. In some embodiments, actuator 2206 is operable to disengage lock 1302c by retracting a pin 2302 into an aperture of a spool 2306, thereby moving mating interlocking connector 2204 downward such that connector 2202 can move laterally toward the exterior of the PCS 100. In some embodiments, actuator 2206 includes a bias member 2304 (e.g., a spring) that biases lock 1302c toward the engaged position. Actuator 2206 may be controlled by access controller 1310.

[00156] FIG. 23B shows a cross-sectional view of compartment lock 1302c of display compartment 870 with the lock disengaged and the access member (display module 700) in the open position, according to some embodiments. In the example of FIG. 23B, pin 2302 has been retracted, thereby causing retention member 2208 and mating interlocking connector 2204 to move downward, thereby releasing connector 2202 to move laterally toward the exterior of PCS 100.

[00157] An embodiment has been described in which compartment lock 1302c of display compartment 870 includes a connector 2202 and a mating interlocking connector 2204. In some embodiments, a compartment lock 1302c may include multiple pairs of connectors and mating interlocking connectors. The connectors may be arranged around a periphery of display module 700, and the mating interlocking connectors may be arranged around a periphery of display compartment 870. For example, retention member 2208 may include one or more mating interlocking connectors, and a second retention member disposed on the opposite side of display module 700 may also include one or more mating interlocking connectors. In some embodiments, the connectors 2202 may be disposed on the retention members 2208, and the mating interlocking connectors 2204 may be disposed on the display module 700.

[00158] As described above, PCS 100 may include two display modules 700 facing in opposite directions. In such embodiments, either one or both display modules may be equipped with compartment locks 1302c and actuators 2206 that operate independently or in unison.

[00159] FIG. 24 shows a perspective view of a communications compartment 880, according to some embodiments. In some embodiments, communications compartment 880 includes a removable cap 985, which may function as access member 1304d, and may be secured to the PCS by inserting security fasteners through apertures 2404 and 2406. The security fasteners may function as compartment lock 1302d. According to some embodiments, the closed and open positions of access member 1304d (e.g., cap 985) are illustrated in FIG. 9A and FIG. 24, respectively.

[00160] Perspective views of mounting compartment 890 are shown in FIGS. 9A, 9C, and 25, according to some embodiments. Mounting compartment 890 may include a cover panel 991. In some embodiments, cover panel 991 functions as access member 1304e for mounting compartment 890. In some embodiments, the lock 1302e for mounting compartment 890 includes a set of latches disposed proximate the periphery of cover panel 991 and a corresponding set of latch receptacles disposed proximate the periphery of mounting compartment 890 or vice versa. When the lock is engaged, the interlocking of the latches and the latch receptacles may hold the access member securely in the closed position. The lock may be disengaged by access controller 1310, which may drive one or more actuators coupled to the latch receptacles to release the latches, thereby allowing the access member to be moved from the closed position (e.g., a position in which the interior of the compartment is inaccessible, such as the position of cover panel 991 in FIG. 9A) to the open position (e.g., a position in which the interior of the compartment is accessible, such as the position of cover panel 991 in FIG. 9C). [00161] In some embodiments, the mounting compartment 890 contains a mains power connection and one or more network connections . The network connection(s) may be, for example, fiber optic and/or copper network connections, depending, for example, on where the PCS is located and what type of network service is available. In some locations, PCS 100 may receive input data through one or more fiber network connections, provide output data through one or more copper network connections, or vice versa.

[00162] In some embodiments, the mounting compartment 890 may contain one or more junction boxes 2500 for connecting power and/or network connections. In some embodiments, the junction boxes 2500 are attached to the mounting compartment 890 before the PCS 100 is installed, which may facilitate securing of the power and network cabling 2502 (e.g., fastening of the cabling to the PCS). In some embodiments, the junction boxes are attached to the PCS 100 before it is installed on mounting subsystem 190. In some embodiments, a portion 2504 of the mounting subsystem 190 forms a bottom surface of the mounting compartment 890. In some embodiments, portions of the power and/or network cabling are located in the mounting subsystem 190 before the PCS 100 is mounted, and the cabling is connected to the PCS 's mains power connection and network connection(s)after the PCS 100 is mounted.

[00163] In some embodiments, one or more compartments of PCS 100 are hierarchically secured, such that access to one or more compartments is a precondition for accessing another compartment. For example, security interface 1320 may be disposed within a compartment C (e.g., air intake compartment 865 or communication compartment 880), such that a user can access the security interface 1320 only after accessing the compartment C. The user can then provide authentication data to access controller 1310 via security interface 1320, and thereby gain access to other compartments (e.g., display compartment 870, electronics compartment 840, or mounting compartment 890). In some embodiments, the security interface 1320 may include a key reader disposed on an exterior surface of the PCS 100 or proximate to the PCS 100.

Servicing a PCS

[00164] Proper servicing of a PCS 100 can be difficult, for a variety of reasons. For example, when a PCS 100 is located on a city sidewalk or in another public area with heavy pedestrian traffic, service personnel may not have the time or space to attempt complicated

troubleshooting of PCS 100 components (e.g., electronic parts or circuit boards), and use of diagnostic equipment (e.g. oscilloscopes, meters, etc.) may not be feasible. In addition, technicians may not be skilled or trained to perform troubleshooting of PCS 100 faults in the field.

[00165] Servicing of a PCS can be facilitated if the PCS 100 itself is able to identify faults accurately and transmit the information to a remote entity (e.g., a service center), so field service technicians can be deployed to fix the identified faults. It can be appreciated that servicing of the PCS can be further facilitated if the PCS 100 accurately identifies the faulty component, so field service technicians can bring a suitable replacement component with them when deployed. In some embodiments, a preferred function of the field service technician is to replace the faulty component, re-test PCS 100 and place it back into service.

[00166] The inventors have recognized and appreciated that using an automated servicing system can facilitate the task of servicing one or more PCSs within a limited time period. In some embodiments, the automated servicing system quickly and accurately identifies PCS components or systems that are faulty or are likely to fail in the near future, and transmits this information to a remote service center. Based on the data received from the automated servicing systems of a set of PCSs, the service center may allocate servicing resources (e.g., technicians, replacement parts, etc.) to the PCSs, schedule maintenance work for the PCSs, and dispatch technicians (with suitable replacement parts) to perform the maintenance according to the schedule. In some embodiments, after repairing or replacing a PCS component, a technician may use the automated servicing system to perform one or more tests to determine whether the serviced PCS is operating properly.

[00167] It can be appreciated that a service center may manage the servicing of a large number of PCSs per day. It is conceivable that 10, 100, or even more PCSs may require service in a single day. In addition, it can be expected that PCSs will be used periodically (e.g., by people on the street). In some embodiments, the above-described servicing techniques can identify and work around periods when PCS 100 is in use. In some embodiments, the above-described servicing techniques identify the criticality of the fault, so that servicing of the structures can be prioritized. For example, servicing of a PCS 100 that has failed completely (e.g., shut down) may be prioritized over servicing of a PCS 100 that has a faulty fan (e.g., slower rotation than expected).

[00168] As described above, the PCS 100 may include one or more components (e.g., a maintenance subsystem 130) that can run tests (e.g., maintenance diagnostics) on components of PCS 100. Such tests may be referred to herein as "self-tests", because one or more components of the PCS 100 perform the tests on themselves, perform the tests on other components of the PCS, and/or initiate performance of the tests by other PCS components. Some techniques for initiating such tests are described below. Based on the results of such tests, the PCS 100 may determine whether a tested component is operating properly, provide data describing the component's status (e.g., transmit an error code to a PCS operator via network 126 or communications subsystem 180, display an error message via display subsystem 170 or user interface subsystem 150, etc.), take action to resolve the malfunction (e.g., reboot the malfunctioning component), turn off power to the faulty component or to the entire PCS (e.g., if the malfunction presents a safety hazard), etc.

[00169] In some embodiments, PCS 100 includes a servicing controller for controlling (e.g., initiating and/or running) self-tests. For example, the servicing controller may test several PCS components or systems to determine whether they are operating properly and in suitable condition. The results of such tests may include one or more codes to indicate which component or system was tested, which test was run, and the outcome of the test (e.g., "pass" or "fail"). The servicing controller may interface to other components in PCS 100. It can be appreciated that the PCS 100 may contain many components (e.g., high-definition video displays, complex networking equipment, telecommunications equipment, an emergency call system, etc.) that can be tested to determine whether the components are operating properly, exhibiting faults, etc. In some embodiments, the results of such self-tests (including, for example, the test result codes) may be transmitted to the internet or cloud, so a remote entity (e.g. a remote service center) may take action to service or maintain PCS 100. In some embodiments, only the results of self-tests that resulted in a "failed" outcome are transmitted to the remote entity. It can be appreciated that transmitting only the results of failed tests reduces the amount of network traffic between the PCSs and the remote service center.

[00170] A method 2600 for servicing a PCS is shown in FIG. 26, according to some embodiments. The servicing process illustrated in FIG. 26 may be performed for any or all of the PCSs 100 in service.

[00171] In step 2602, the servicing controller of a PCS initiates a self-test. The self-test may be initiated in response to the servicing controller determining that one or more criteria for initiating a self-test are met. Some examples of such criteria and some embodiments of techniques for determining whether such criteria are met are described in further detail below. [00172] In step 2604, the servicing controller may transmit the results of the self-test to a remote service center. As discussed above, in some embodiments, the servicing controller transmits the results of the self-test only if the test resulted in a "failed" outcome.

[00173] In step 2606, the remote service center receives and processes the test results transmitted by the servicing controller. As discussed above, the test results may include codes identifying the PCS components that were tested and indicating the status of such components. Based on such codes, the remote service center may determine that one or more components of the PCS are faulty and identify replacement components. Personnel or automated systems of the remote service center may retrieve the replacement component(s) (step 2608), and service personnel may be dispatched with the replacement component(s) to repair the PCS (step 2610).

[00174] In step 2612, the service personnel may replace the PCS's faulty component(s) with the replacement components. In step 2614, the PCS may be re-tested. In some embodiments, the service personnel may perform manual tests on the replacement components, related PCS systems, and/or the PCS as a whole. In some embodiments, the PCS may perform self-tests (e.g., the same self-tests that led to the detection and replacement of the faulty component(s)). Such self-tests may be initiated, for example, by the service personnel or by the servicing controller in response to the replacement of the component(s).

[00175] In step 2616, if the PCS passes the re-tests, the PCS may be placed back into service. In step 2618, one or more faulty components removed from the PCS may be sent to a repair depot. In step 2620, a determination is made as to whether the faulty components can be repaired. If a faulty component is determined to be irreparable (e.g., because repairing the component would be impractical, infeasible, or not cost-effective), the component may be recycled or retired, and a new component may be ordered (step 2622). Otherwise, the faulty component may be repaired (step 2624). The repaired component or new component may be added to a replacement stock, from which replacement components may be retrieved (step 2608) for future PCS servicing.

[00176] An exemplary block diagram of a servicing system 2700 of a PCS 100 is shown in FIG 27, according to some embodiments. In some embodiments, the servicing system 2700 includes a servicing controller 2710 (e.g., the maintenance subsystem 130 or a portion thereof, for example, processing device(s) 400), a temperature controller 2705 (e.g., the temperature control subsystem 160 or a portion thereof, for example, a processing device that controls the operation of the temperature control subsystem 160), one or more display controllers 2703 (e.g., a display modules 700 or a portion thereof, for example, the processing device(s) 710), a user interface controller 2701 (e.g., the user interface subsystem 150 or a portion thereof, for example, the processing device(s) 557), a network controller 2707 (e.g., the network subsystem 120 or a portion thereof, for example, a processing device that controls the operation of the network subsystem), a power distribution controller 2702 (e.g., the power distribution subsystem 1 10 or a portion thereof, for example, the power distribution board 202), and/or a backup battery controller 2706 (e.g., the power distribution board 202).

[00177] In the example of FIG. 14, servicing controller 2710 has a communications interface with one or more of the other PCS controllers and is able to initiate self-tests within the components of the PCS 100 corresponding to those controllers. In this example, the servicing controller 2710 may interface directly to the display controllers 2703, the user interface controller 2701, the network controller 2707, and the power distribution controller 2702. The power distribution controller 2702 may interface directly to the temperature controller 2705 and battery backup controller 2706. In some embodiments, the temperature and battery backup controllers may be integrated with the power distribution controller. The interfaces between the controllers may include, but are not limited to USB, RS232, RS485, SPI, I2C, SMBUS, Ethernet, WiFi, Bluetooth and/or ZigBee.

[00178] The network controller 2707 may connect the PCS 100 to a network 126 (e.g., via a fiber or copper backhaul connection). The servicing controller 2710 may receive the self-test results from the other controllers and compile the results into a file package that is transmitted to a remote entity. In this example, the servicing controller 1410 interfaces directly to the network controller 2707 to send the file package to the cloud or a remote entity's network database. In some embodiments, the other controllers may also interface (e.g. via Ethernet) to the network controller 2707 (e.g., for remote flash programming).

[00179] One advantage of this configuration is that self-tests may be initiated from the servicing controller 2710, so the test execution and results may be synchronized by the servicing controller. Also, the self-test results can be compiled into a single file package, as opposed to many. Another advantage of this configuration is that the servicing controller 2710 can gain information with regard to the other controllers. For example, the servicing controller 2710 may receive information indicating that another controller has a fault. In another example, the servicing controller 2710 may not receive any information from another controller, and may determine based on the absence of communication from the controller that the controller is malfunctioning. In some embodiments, the servicing controller 2710 may send the power distribution controller 2702 a command to power cycle a non-responsive controller, which may cause the non-responsive controller to reboot and resume operation.

[00180] One potential disadvantage of this configuration relates to security. If one controller (e.g., the servicing controller 27100 is compromised or "hacked," then all of the controllers and the entire PCS may become susceptible.

[00181] In some embodiments, the servicing controller 2710 is physically located in one of the compartments of the PCS 100. For example, the servicing controller 2710 may be located in the electronics compartment 840. As another example, in embodiments in which the electronics compartment 840 includes a maintenance compartment that houses the maintenance subsystem 130 and is accessible independently from any other compartments within the electronics compartment 840, the servicing controller 2710 may be located in the maintenance compartment. Alternatively, in embodiments in which the PCS 100 does not include an electronics compartment 840 but includes a maintenance compartment that houses the maintenance subsystem 130 and is accessible independently from other compartments of the PCS (e.g., user interface compartment 850, the display compartment 870, communication compartment 880, mounting compartment 890, etc.), the servicing controller 2710 may be located in the maintenance compartment. In this way, access to the servicing controller 2710 may be controlled by the access-control system 1300 using the techniques described above.

[00182] An exemplary block diagram of another servicing system 2800 of a PCS 100 is shown in FIG 28, according to some embodiments. In the example of FIG. 28, the servicing system 2800 includes more than one servicing controller. For example, the servicing system 2800 may include a maintenance controller 2808 (e.g., the maintenance subsystem 130 or a portion thereof, for example, processing device(s) 400), a temperature controller 2805 (e.g., the temperature control subsystem 160 or a portion thereof, for example, a processing device that controls the operation of the temperature control subsystem 160), one or more display controllers 2803 (e.g., a display modules 700 or a portion thereof, for example, the processing device(s) 710), a user interface controller 2801 (e.g., the user interface subsystem 150 or a portion thereof, for example, the processing device(s) 557), a network controller 2807 (e.g., the network subsystem 120 or a portion thereof, for example, a processing device that controls the operation of the network subsystem), a power distribution controller 2802 (e.g., the power distribution subsystem 110 or a portion thereof, for example, the power distribution board 202), and/or a backup battery controller 2806 (e.g., the power distribution board 202).

[00183] In some embodiments, the self-test functionality of the servicing system 2800 is distributed among one or more of the servicing controllers illustrated in FIG. 28 (e.g., the maintenance controller 2808, user interface controller 2801, and display controllers 2803). In such embodiments, the servicing system 2800 includes a distributed servicing controller comprising the individual controllers that implement the self-test functionality. Each controller included in the distributed servicing controller can initiate and run a particular set of tests suitable for the devices to which the controller is connected. For example, the display controllers 2803 are able to communicate with the display modules 700 to determine the results of their internal self-tests. In some embodiments, maintenance controller 2808 has an interface with power distribution controller 2802 and can send it commands, including a command to run a self-test. Each controller initiates and/or executes the appropriate self-tests and compiles the results into a file package that is transferred to a remote entity (e.g., via the internet and/or the cloud).

[00184] Potential disadvantages to this configuration related to synchronization of tests and handling of test results. It may be difficult to synchronize the tests of the servicing system 2800 unless the synchronization is managed externally to PCS 100. Also, the servicing system 2800 may generate and transmit multiple file packages of test results to the service center for processing, rather than generating and transmitting a single file package. One advantage to this configuration is security. Since many of the controllers don't communicate with each other, it is more difficult for the entire PCS becoming compromised.

[00185] One or more of the servicing controllers illustrated in FIG. 28 may be physically located in particular compartments of the PCS 100. In some embodiments, each of the servicing controllers illustrated in FIG. 28 may be co-located in the same compartment as at least a portion of the equipment that can be tested by the respective servicing controller. For example, the maintenance controller 2808 may be operable to test the maintenance subsystem 130 or components thereof, and may be located in the electronics compartment 840 or in a maintenance compartment. The user interface controller 2801 may be operable to test the user interface subsystem 150 or portions thereof and may be located in the user interface compartment 850. The display controllers 2803 may be operable to test the display subsystem 170 and may be located in the display compartment 870. The network controller 2807 may be operable to test the network subsystem 120 and/or the communications subsystem 180, and may be located in the electronics compartment 840. Alternatively, in embodiments in which the electronics compartment 840 includes a network compartment that houses the network subsystem 120 and is accessible independently from any other compartments within the electronics compartment 840, the network controller 2807 may be located in the network compartment. Alternatively, in embodiments in which the PCS 100 does not include an electronics compartment 840 but includes a network compartment that houses the network subsystem 120 and is accessible independently from other compartments of the PCS (e.g., user interface compartment 850, the display compartment 870, communication compartment 880, mounting compartment 890, etc.), the network controller 2807 may be located in the network compartment.

[00186] In this way, access to the individual servicing controllers may be controlled by the access-control system 1300 using the techniques described above, and granting an operator access to a particular compartment of the PCS may also grant the operator access to a servicing controller operable to test the equipment located in that compartment, without granting the operator access to servicing controllers operable to test equipment in other compartments of the PCS.

[00187] A servicing controller may initiate a particular self-test in response to determining that one or more criteria for initiating the self-test are satisfied. Any suitable criteria for initiating a self-test may be used, any the servicing controller may use any suitable technique to determine whether the criteria for initiating a self-test are met. Some examples of suitable criteria for initiating self-tests and suitable techniques for determining whether such criteria are met are described below.

[00188] In some embodiments, a servicing controller may initiate a self-test based on a determination that one or more environmental criteria for initiating the self-test are met.

Environmental criteria may be expressed in terms of environmental metrics, for example, temperature, humidity level, type of precipitation or weather, airborne particle level, wind speed, sunlight level, electromagnetic field strength, mechanical force, etc. Some examples of environmental criteria for initiating a self-test may include:

[00189] (1) the temperature T at the PCS (e.g., an ambient temperature at a location outside but proximate to the PCS, a surface temperature of the PCS, a temperature within a particular compartment of the PCS, etc.) is less than a specified temperature TLOW or greater than a specified temperature THIGH;

[00190] (2) the humidity level H at the PCS (e.g., at a location outside but proximate to the PCS, within a particular compartment of the PCS, etc.) is less than a specified humidity level H _L ow or greater than a specified humidity level H _H IGH;

[00191] (3) a particular type of precipitation or weather (e.g., snow, rain, hail, freezing rain, sleet, ice, etc.) is present at the PCS;

[00192] (4) an airborne particle level P at the PCS (e.g., at a location outside but proximate to the PCS, within a particular compartment of the PCS, etc.) is greater than a specified airborne particle level PHIGH;

[00193] (5) the wind speed W at the PCS (e.g., at a location outside but proximate to the

PCS) is greater than a specified wind speed WHIGH;

[00194] (6) the sunlight level S at the PCS (e.g., at a location outside but proximate to the PCS) is less than a specified sunlight level SLOW or greater than a specified sunlight level SHIGH;

[00195] (7) the electromagnetic field strength E at the PCS (e.g., at a location outside but proximate to the PCS, within a particular compartment of the PCS, etc.) is greater than a specified electromagnetic field strength level E _H IGH; and/or

[00196] (8) a mechanical force F applied to the PCS is greater than a specified mechanical force FMAX-

[00197] A servicing controller may determine obtain data representing the values of the environmental metrics underlying such environmental criteria using any suitable techniques. For example, a servicing controller may obtain environmental data indicating the temperature, humidity level, type of precipitation or weather, airborne particle level, wind speed, sunlight level, electromagnetic field strength, etc. at a location outside but proximate to the PCS via the network 126 (e.g., from the remote servicing center or from any other suitable computer-based source of environmental data). In addition or in the alternative, the PCS may include one or more environmental sensors, including, without limitation, temperature sensors (e.g., thermometers, thermocouples, etc.), humidity sensors, airborne particle counters, wind speed sensors (e.g., anemometers, wind vanes, etc.), light intensity sensors (e.g., photocells), electromagnetic field sensors, force sensors (e.g., strain gauges, piezoelectric sensors, etc.). Such sensors may be disposed outside but proximate to the PCS, on a surface of the PCS, and/or within the PCS (e.g., within a compartment of the PCS) and may be communicatively coupled to the servicing controller and configured to provide environmental data to the servicing controller. For example, particular compartments of the PCS may include particular environmental sensors operable to obtain environmental data suitable for evaluating one or more environmental criteria to determine whether to initiate a self-test of a subsystem or component within the compartment. Irrespective of the source of the environmental data or the manner in which the environmental data are obtained, the servicing controller may use the environmental data to determine whether one or more environmental criteria for initiating a self-test are met.

[00198] In some embodiments, the servicing controller maintains (e.g., in a computer-readable storage device) a data set indicating which self-tests should be initiated on particular components or subsystems of the PCS 100 when particular environmental criteria are met. This data set may be obtained from a servicing expert (e.g., received from the remote servicing center) and may be updated remotely (e.g., via the network 126). The criteria for initiating a particular self-test of a particular component of subsystem may be different from the criteria for initiating a different self-test of the same component / subsystem, or different from the criteria for initiating the same self-test of a different component / subsystem.

[00199] Other criteria for initiating a self-test are possible. In some embodiments, the remote service center can instruct the servicing controller to initiate a particular self-test (e.g., by communications sent via network 126). In some embodiments, self-tests may be scheduled. For example, a particular self-test may be scheduled to occur regularly on a particular day or days of the week at a particular time or times. As another example, a particular self-test may be scheduled to occur at a randomly selected time (e.g., on a specified date or on a randomly selected date). Performing tests at randomly selected times may increase the likelihood of detecting intermittent faults or faults that correlate with conditions that prevail only at certain times of day. As another example, a particular self-test may be scheduled to occur during a time of day when the PCS is unlikely to be in use, or when the PCS's processing load is likely to be low (e.g., during late night or early morning hours). Scheduling tests during off-peak time periods may increase the likelihood of the test being completed without interruption, and/or may reduce the likelihood of interfering with other uses of the PCS.

[00200] In some embodiments, a self-test may be initiated manually (e.g., by a service worker). For example, a service worker may access a servicing controller via the user interface subsystem 150. For security reasons, access to the servicing controller may be granted only after the service worker provides suitable authentication data (e.g., via a user input device 552 of the user interface subsystem 150). After suitable authentication data is provided, the servicing controller may present a menu of tests, from which the service worker can select one or more tests to be performed. Permitting service workers to manually initiate tests may be advantageous for several reasons. It can be appreciated that some components (e.g., pushbuttons or other user-activated mechanical components) can be difficult to test unless a user physically activates the mechanical component. In such cases, the service worker can initiate the self-test and, when prompted by the servicing controller (e.g., via an output device 554 of the user interface subsystem 150), the service worker can activate the appropriate mechanical component (for example, press the E91 1 button). In another example, after replacing a field replaceable unit (FRU), a service worker may initiate a test of the replacement FRU to confirm that the replacement FRU is operating properly.

[00201] In some embodiments, the operator of the PCS 100 may have contractual obligations to test some or all of its systems (e.g., E91 1 system) periodically (e.g., once every 24 hours) to confirm that such systems are operating properly. In some embodiments, the servicing system includes a real-time clock. In some embodiments, the real-time clock initiates a self-test at a scheduled time, and the appropriate servicing controller then performs the self-test. In one example, the real-time clock is programmed to initiate a self-test at a time of day when the PCS is unlikely to be in use (e.g., 3 :00AM). The real-time clock may provide a signal (e.g., an interrupt) to the servicing controller to initiate a self-test.

[00202] In some embodiments, the servicing controller implements an event manager that can access the internet to synchronize the clock with the correct time of day. When the event manager sees that the time of day matches the scheduled time (e.g., an alarm clock setting) for a self-test, it initiates the self-test. This technique provides a solution to the synchronization problem described above for the configuration in FIG. 28: all of the controllers can be preprogrammed to the same self-test time.

[00203] In some embodiments, the self-test is initiated by a remote entity. To solve the synchronization problem described above for the configuration in FIG. 28, the remote entity may initiate self-test by all the controllers at the same time. In one example, the remote entity is a service center that monitors a large number of PCSs. The service center may use a computer program to schedule the times of the self-tests of the PCSs. In some embodiments, the self-tests are initiated at the same time. For example, the service center initiates self-test for the PCSs at a time when the PCS are not likely to be in use (e.g., pre-dawn hours). In some embodiments, the self-tests are initiated at different times. For example, self-test for the PCSs may be staggered to avoid a large amount of data traffic being transmitted to the service center's network at the same time. In some embodiments, the service center may force a self-test regardless if one had been run recently or previously during power on or a scheduled time. For example, if the service center is unable to determine which component in a PCS is faulty, the service center may send the PCS's servicing controller a signal to initiate one or more tests to isolate and identify the faulty component.

[00204] In some embodiments, the servicing controller runs a self-test when it is powered on. This technique may be used to identify a faulty component or system on a power cycle.

[00205] In some embodiments, the servicing controller can detect faults during run time. In a preferred embodiment, if a fault is detected at run time, the servicing controller transmits the fault information to a remote entity such as a service center. Alternatively, in some

embodiments, the servicing controller may place the fault into a log file, which is then parsed by the service center's computer system. The service center may then decide to schedule or initiate a self-test, send a command to maintenance controller 2808, which in turn sends a command to power distribution controller 2802 to reboot or power down the component or system that contains the component. In some embodiments, when the component or system is rebooted, it runs a self-test. The service center may then either power down or deploy service personnel depending on the nature of the fault, the priority of the fault or the risk of the fault causing a hazard.

[00206] In some embodiments, the servicing controller 1410 can sense AC power loss, the amount of AC current being used by PCS 100, the voltage and frequency of the AC power.

[00207] In some embodiments, the PCS components that can be tested via the above-described servicing techniques may include, but are not limited to an electronics subsystem 140, power distribution subsystem 110, network subsystem 120, maintenance subsystem 130, user interface subsystem 150, temperature control subsystem 160, display subsystem 170, communications subsystem 180. a display module 700, a display, display backlight, processing device, sensor, WiFi access point, keypad, pushbutton, switch, touchscreen, camera, microphone, speaker, hearing loop, LTE module, 3G module, accelerometer, solenoid, actuator, circuit breaker, GFCI, small cell, fan, blower, near field communications (NFC), battery, Ethernet switch, service switch, network switch, fiber switch, temperature controller, power distribution controller, USB charging station and/or E91 1 call system. In some embodiments, the tests of processing device tests may include, but aren't limited to tests of memory, peripherals, watchdog circuits, timers, clocks, supply voltages, reference voltages, cyclical redundancy checks on memory devices, communication interfaces and/or hardware tests.

[00208] In some embodiments, the servicing controller transmits the results of the self-test to a remote entity, such as a service center. The servicing controller may compile the test results into a file package that the service center receives and stores (e.g., in a network database). In some embodiments, the results include one or more codes (e.g., alphanumeric codes). In some embodiments, the codes can be parsed to identify the tested component or system and determine the status of the component / system (e.g., whether it has a fault). In some embodiments, the codes represent diagnostic information. It can be appreciated even if a component / system passes a self-test, the servicing controller may still collect diagnostic information associated with the tested component / system and transmit such information to the service center.

[00209] The diagnostic information may include, but is not limited to one or more temperature measurements, voltage measurements, current measurements, frequency measurements, ambient light measurements, environmental measurements, backlight settings, health indicators, component statuses, battery statuses, fan statuses, communications statuses, compartment statuses, door statuses, etc.. In some embodiments, the diagnostic information may also be accompanied by a warning indication. It can be appreciated that a warning indication may be predictive of a failure before it occurs. In some embodiments, the warning indication may be a number from 1 to 10, wherein 10 is indicative that a failure is likely to occur within a short period of time, and 1 is indicative that near-term failure is unlikely.

[00210] In some embodiments, the codes included in the test results represent a priority level. The service center may then manage a large number of PCSs using a prioritized list of the PCSs that need servicing. In some embodiments, a fault with the E911 system is the highest priority. Another example of a fault that may have high priority is a fault of the battery backup system. It can be appreciated that if the battery is not charged and cannot be charged, the E91 1 system would be inoperable in the event of an emergency accompanied by a loss of main power.

Another example of a fault that may have high priority is a fault of the display modules. It can be appreciated that the PCS operator may want to service the displays quickly because the displays generate advertisement revenue. An example of a fault that may have lower priority is a fan blockage (e.g. a fan's rate of rotation is detected to be slower than expected).

[00211] In some embodiments, the codes included in the test results represent a risk-hazard level. It can be appreciated that a certain PCS faults may present a safety hazard for pedestrians and/or may present a risk of significant damage to the PCS (e.g., a total loss of the PCS). For example, if the service center receives an indication that there is a high likelihood of such a hazard to safety or risk to equipment ("risk-hazard"), the service center may decide to power down the PCS 100 and deploy field service personnel immediately. In some embodiments, the risk-hazard level is a number from 1 to 10, with 10 being the highest level of estimated risk- hazard. One example of a high level risk-hazard is when the servicing controller detects a fault on one or more power supplies and additionally detects an extremely high temperature from a temperature sensor located in the area of the power supply. It can be appreciated that detecting a high level risk-hazard and transmitting such information to the service center may afford the service center the ability to power off PCS 100 before users are harmed and/or before PCS equipment is severely damaged (e.g., before a fire occurs). In some embodiments, detection of risk-hazard levels may involve the use of other types of sensors, for example smoke detectors, fire detectors, water detectors, hazardous or explosive gas detectors, stray voltage detectors and other suitable sensors known to those skilled in the art.

[00212] In some embodiments, with the consideration that PCS 100 is designed for field replaceabilty, the codes included in the test results represent part SKU numbers. In some embodiments, PCS 100 can be broken down into field replaceable units (FRUs). The field service personnel may retrieve an FRU from inventory, along with information regarding the location of PCS 100 before being deployed. Rather than attempting to repair a damaged component in the field (which may be difficult or dangerous, and may be beyond the service personnel's skill level), the service personnel may arrive with a replacement FRU, remove the faulty FRU and replace it. The faulty FRU is then returned to the repair depot for disassembly and repair. The parts can be then be quickly replaced and the system tested.

[00213] In some embodiments, the codes included in the test results may represent a time and/or date stamp. It can be appreciated that a time and date stamp may be used for historical data and for such things as trending failure data and analysis.

[00214] In some embodiments the codes included in the test results represent PCS 100 location information. Some examples of location information are a street address, mile marker, latitude and longitude, a phone number, etc. It can be appreciated that the use of a phone number allows for the location of a PCS 100 to be determined by cross-referencing the PCS's phone number with the PCS's location in a lookup table or database. The location information may be paired with the SKU numbers, so service personnel can determine which replacement parts are going to which locations. It can be appreciated that a combination of location information and priority information could be used by the service center to plan service routes and schedules.

[00215] In some embodiments, the codes included in the test results may represent a model number. For example, PCS 100 may have different configurations, such as a residential unit that does not contain an advertisement display. It can be appreciated that although an advertisement model might be appropriate for city environments such as Times Square, it might not be appropriate for residential neighborhoods. In some embodiments, the codes included in the search results may represent a serial number of the PCS, which may be used to determine the PCS's configuration. It can be appreciated that a PCS 100 located in a densely populated environment (e.g., Times Square) may have a large number of mobile device users and therefore may have more than one WiFi access point or small cell system.

[00216] In some embodiments, the PCS 100 performs servicing tasks (e.g., self-tests) conditionally. A method 2900 of conditionally servicing a PCS 100 is shown in FIG. 29, according to some embodiments. The conditional servicing method 2900 may be applied, for example, to a PCS 100 with a servicing system 2700 or 2800 that determines that criteria for initiating a self-test are met. In some embodiments, as seen can been seen in FIG. 29, the PCS 100 delays or aborts the self-test conditionally. In some embodiments, if the PCS is in use (e.g., the PCS is being used for a phone call or an E911 call), the self-test is delayed. For example, the self-test may be delayed for a predetermined period of time. The predetermined time may be programmed into a real time clock, so the self-test will be initiated in the future at the specified time or after the specified period of delay.

[00217] In step 2902 of the conditional servicing method 2900, a servicing controller determines that criteria (e.g., environmental criteria, temporal criteria, etc.) for initiating a self- test are satisfied. Some examples of suitable criteria and techniques for determining whether such criteria are met are described above. This determination may be made, for example, by a servicing controller 2710 as illustrated in FIG. 27, or by one of the servicing controllers (e.g., 2801, 2803, 2807, 2808) illustrated in FIG. 28. [00218] In step 2904, the servicing controller determines whether the PCS is in use. In some embodiments, the PCS is "in use" if an E911 call is in progress. In some embodiments, the PCS is "in use" if the load (e.g., processing load, communication load, power load, etc.) on particular components or subsystems of the PCS exceeds specified loading thresholds. For example, the PCS may be "in use" if the processing load on the user interface subsystem 150 exceeds a specified computational load, if the communication load on the communications subsystem 180 exceeds a specified communication load, the power load on the power distribution subsystem 110 exceeds a specified power load, etc. In some embodiments, the PCS is "in use" if a user is interacting with the user interface subsystem 150 (e.g., if a user has provided input to the user interface subsystem 150 within the last 30 seconds, 60 seconds, two minutes, five minutes, etc.).

[00219] If the PCS is not in use, the servicing controller initiates the self-test at step 2906. In some embodiments, the servicing controller initiates the self-test by instructing another controller in the PCS 100 to begin performing the self-test. In some embodiments, the servicing controller itself actually begins performing the self-test.

[00220] After initiating the self-test, the servicing controller monitors the PCS (step 2908) to determine whether the PCS is in use until the test completes (step 2910) or until the servicing controller determines that the PCS is in use. If the test completes, the servicing controller transmits the results of the test to the service center in step 2912. If the servicing controller determines that the PCS is in use before the test completes, the servicing controller terminates the self-test at step 2914 and reschedules the self-test at step 2916. Some techniques for rescheduling a self-test are described below.

[00221] In some embodiments, if the self-test is running and the servicing controller determines that the PCS 100 is "in use", the test is aborted and rescheduled to be performed after a predetermined period of time. For example, if the servicing controller begins running self-test and a user presses the E911 button, the self-test is aborted, so as to avoid disrupting the E911 call.

[00222] In some embodiments, if the self-test is remotely initiated and PCS 100 is in use, the self-test controller sends the remote entity an indicator to reschedule the test. For example, if an E911 call is in progress when instructions to initiate a self-test are received, the servicing controller may send the remote entity a code to reschedule the self-test for a later period of time. As another example, if a self-test has been remotely initiated and then the servicing controller determines that the PCS is "in use" (e.g., a user begins using the PCS), the servicing controller may abort the self-test and send the remote entity an indicator to reschedule the test. For example, if the servicing controller is running a self-test and a user presses the E911 button, the servicing controller can abort the test and send the remote entity instructions to reschedule the self-test for a period of time later.

[00223] In some embodiments, the servicing controller sends the remote entity a code indicating a low use period to the remote entity. For example, if PCS 100 has not been used for a period of time, it may send the remote entity a code. Based on the code, the remote entity can determine whether to initiate a self-test.

[00224] In some embodiments, an aborted self-test can be rescheduled to occur at a randomly selected time. It can be appreciated if PCS 100 is in use or if an event causes the servicing controller to abort a self-test, a random time delay may be appropriate to avoid heavy use periods. In addition, rescheduling an aborted self-test for a randomly selected time may allow the PCS to be tested under different conditions (e.g.,, different environmental conditions at different times of day). For example, if the self-test is run at different temperatures it may be able to detect a component that has an erratic, temperature-dependent fault. In some embodiments, the random time delay generated is in the range of 2 to 4 hours, 4 to 12 hours, or 12 to 24 hours.

[00225] In some embodiments, the PCS conditionally skips the self-test. As those skilled in the art can appreciate, if the self-test had been run recently (e.g., at power-up or in response to a remote request from the service center) and the results of the test were successful, then the self- test diagnostics may be skipped. In a preferred embodiment of the present invention, a self-test is skipped when it has been run successfully within a predetermined period of time. In one preferred embodiment, the predetermined period of time is 24 hours, but under some conditions different periods of time may be used.

[00226] In some embodiments, the self-test controller transmits a notification that PCS 100 is due for mandatory service. It can be appreciated that PCS 100 may have contractual obligations to be serviced within periods of time. Some examples of service include but are not limited to cleaning, preventative maintenance, manual tests, safety hazard tests or visual inspection. An example of a manual test would be the physical pressing of the E911 button during a self-test.

[00227] In some embodiments, when on battery backup power the processing device 557 of the user interface subsystem 150 runs a self-test on the network module 556 to determine whether it is working properly. In some embodiments, the network module 556 and associated antenna are tested to determine whether they can communicate with a cell tower. In some

embodiments, if the network module 556 fails, the servicing controller uses a wired communications controller to send an error message to the remote entity.

Further Description of Some Embodiments

[00228] Embodiments have been described in which an servicing controller performs a servicing process. The various servicing methods or processes outlined herein can be coded as software that is executable on one or more processors that employ one of a variety of operating systems or platforms. Additionally, such software can be written using any of a number of suitable programming languages and/or programming or scripting tools, and also can be compiled as executable machine language code or intermediate code that is executed on a framework or virtual machine. Also, the acts performed as part of the techniques described herein can be performed in any suitable order.

[00229] In this respect, the servicing techniques can be embodied as a computer readable medium (or multiple computer readable media) (e.g., a computer memory, one or more floppy discs, compact discs, optical discs, magnetic tapes, flash memories, circuit configurations in Field Programmable Gate Arrays or other semiconductor devices, or other tangible computer storage medium) encoded with one or more programs that, when executed on one or more computers or other processors, perform methods that implement the various techniques discussed above. The computer readable medium or media can be non-transitory. The computer readable medium or media can be transportable, such that the program or programs stored thereon can be loaded onto one or more different computers or other processors to implement various aspects of the present invention as discussed above. The terms "program" or

"software" are used herein in a generic sense to refer to computer code or set of computer- executable instructions that can be employed to program a computer or other processor to implement various aspects described in the present disclosure. Additionally, it should be appreciated that according to one aspect of this disclosure, one or more computer programs that when executed perform techniques described herein need not reside on a single computer or processor, but can be distributed in a modular fashion amongst a number of different computers or processors to implement various aspects of the present invention. [00230] Computer-executable instructions can be in many forms, such as program modules, executed by one or more computers or other devices. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Typically the functionality of the program modules can be combined or distributed as desired in various embodiments.

[00231] Also, data structures can be stored in computer-readable media in any suitable form. For simplicity of illustration, data structures can be shown to have fields that are related through location in the data structure. Such relationships can likewise be achieved by assigning storage for the fields with locations in a computer-readable medium that conveys relationship between the fields. However, any suitable mechanism can be used to establish a relationship between information in fields of a data structure, including through the use of pointers, tags or other mechanisms that establish a relationship between data elements.

[00232] In some embodiments the technique(s) can be implemented as computer instructions stored in portions of a computer's random access memory to provide control logic that affects the processes described above. In such an embodiment, the program can be written in any one of a number of high-level languages, such as FORTRAN, PASCAL, C, C++, C#, Java, JavaScript, Tel, or BASIC. Further, the program can be written in a script, macro, or functionality embedded in commercially available software, such as EXCEL or VISUAL BASIC. Additionally, the software can be implemented in an assembly language directed to a microprocessor resident on a computer. For example, the software can be implemented in Intel 80x86 assembly language if it is configured to run on an IBM PC or PC clone. The software can be embedded on an article of manufacture including, but not limited to, "computer-readable program means" such as a floppy disk, a hard disk, an optical disk, a magnetic tape, a PROM, an EPROM, or CD-ROM.

[00233] Embodiments have been described in which various aspects of the techniques described herein are applied to a personal communication structure (PCS). In some

embodiments, aspects of the techniques described herein may be applied to any suitable structure including, without limitation, a kiosk (e.g., an interactive kiosk), pay station (e.g., parking pay station), automated teller machine (ATM), article of street furniture (e.g., mailbox, bench, traffic barrier, bollard, telephone booth, streetlamp, traffic signal, traffic sign, public transit sign, public transit shelter, taxi stand, public lavatory, fountain, watering trough, memorial, sculpture, waste receptacle, fire hydrant, vending machine, utility pole, etc.), etc. [00234] Various aspects of the present disclosure can be used alone, in combination, or in a variety of arrangements not specifically described in the foregoing, and the invention is therefore not limited in its application to the details and arrangement of components set forth in the foregoing description or illustrated in the drawings. For example, aspects described in one embodiment can be combined in a suitable manner with aspects described in other

embodiments.

Terminology

[00235] The phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

[00236] The term "approximately", the phrase "approximately equal to", and other similar phrases, as used in the specification and the claims (e.g., "X has a value of approximately Y" or "X is approximately equal to Y"), should be understood to mean that one value (X) is within a predetermined range of another value (Y). The predetermined range may be plus or minus 20%, 10%, 5%, 3%, 1%, 0.1%, or less than 0.1%, unless otherwise indicated.

[00237] The indefinite articles "a" and "an," as used in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean "at least one." The phrase "and/or," as used in the specification and in the claims, should be understood to mean "either or both" of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with "and/or" should be construed in the same fashion, i.e., "one or more" of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the "and/or" clause, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, a reference to "A and/or B", when used in conjunction with open- ended language such as "comprising" can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.

[00238] As used in the specification and in the claims, "or" should be understood to have the same meaning as "and/or" as defined above. For example, when separating items in a list, "or" or "and/or" shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as "only one of or "exactly one of," or, when used in the claims, "consisting of," will refer to the inclusion of exactly one element of a number or list of elements. In general, the term "or" as used shall only be interpreted as indicating exclusive alternatives (i.e. "one or the other but not both") when preceded by terms of exclusivity, such as "either," "one of," "only one of," or "exactly one of." "Consisting essentially of," when used in the claims, shall have its ordinary meaning as used in the field of patent law.

[00239] As used in the specification and in the claims, the phrase "at least one," in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, "at least one of A and B" (or, equivalently, "at least one of A or B," or, equivalently "at least one of A and/or B") can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.

[00240] The use of "including," "comprising," "having," "containing," "involving," and variations thereof, is meant to encompass the items listed thereafter and additional items.

[00241] Use of ordinal terms such as "first," "second," "third," etc., in the claims to modify a claim element does not by itself connote any priority, precedence, or order of one claim element over another or the temporal order in which acts of a method are performed. Ordinal terms are used merely as labels to distinguish one claim element having a certain name from another element having a same name (but for use of the ordinal term), to distinguish the claim elements. Equivalents

[00242] Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated that various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and scope of the invention.

Accordingly, the foregoing description and drawings are by way of example only.