Technical Field

This invention relates, generally, to a telephone system that helps users of travel cards control their costs and limit their losses. More particularly, it relates to a system whereby the travel card customer can control use of the travel cards without relying upon the issuer of the cards.

Background Art

A real time telephone system having utility in reducing losses due to travel card fraud was first introduced in 1990 by the present inventor; that system is disclosed in pending U.S. patent application Serial No. 07/359,200.

The essence of that breakthrough invention was its capture of data at a point between the DCO switching equipment of the telephone system and the internal buffer that temporarily stores data downloaded from said DCO switching equipment. However, in that earlier system, the data is downloaded and captured at the conclusion of a call.

Thus, the earlier system had a few limitations. Perhaps the greatest limitation was that the customer of the travel card issuer was reliant upon the card issuer to take action against fraudulent use of the customer's travel cards. For example, if a travel card customer learns that its Personal Identification Numbers (PINs) are no longer confidential and that unauthorized persons are using stolen PINs, all the customer can do is advise the issuer of its plight and await deactivation of the purloined PINs.

The inability cf the customer to deactivate its own PINs as needed derives from the fact that in all heretofore known telephone systems, the users of the system have been unable to

access the DCO switch for any purpose. This is because the DCO switches of the heretofore known systems, just as in the earlier patented system, were under the control of third party telephone companies and because no inventor had developed a way of penetrating the existing system in a way that would be transparent, i.e., non-disruptive, to it.

If a customer could have access to the DCO switch, that customer would not only be able to deactivate PINs as needed; a number of other valuable services could be obtained as well. For example, a user having access to the DCO switch could tell the switch to re-route certain calls to preselected numbers, to broadcast voice mail messages either to all callers or to certain preselected callers, and the like. The number of additional benefits that a card user might obtain if it had access to the DCO switch would be limited only by the creative capacities of the user.

The need for access by travel card users to DCO switching equipment is substantial because of the financial losses that often occur as a result of travel card abuse. It is well known, for example, that computer hackers having criminal intentions program their computers to place a very large number of calls to a travel card issuer in an attempt to learn access codes; whenever a Personal Identification Number (PIN) generated by the hacker's computer is rejected, another number is tried and so on until a PIN is found. After a large number of PINs have been purloined in this fashion, the hacker sells the PINs to those having the further criminal intent to place long distance calls at the expense of the card issuer's customer. This practice has become so widespread that hackers who crack open confidential PINs are known as crackers.

There are many less catastrophic situations where PINs will need to be deactivated. For example, there is a routine need for card customers to deactivate PINs whenever an employee leaves the company, or when a card is reported lost, etc.

Accordingly, it would be desirable if card users could directly control their use. It would be further valuable if the validity of a travel card's account number and Personal Identification Number (PIN) could be checked prior to call termination. Moreover, it would be desirable if the account status for an individual card could be checked prior to call termination as well.

It would also be desirable if a home office could use its travel card system to leave messages with its agents in the field, to re-route the agent's calls to the home office so that the home office could speak with them, and the like.

Equally desirable would be a telephone system where the travel card user could cause the system to invalidate and refuse to complete all calls placed from certain territories or during certain times, or in accordance with other predetermined parameters.

However, the prior art, when considered as a whole in accordance with the requirements of law, neither suggests that these features would be desirable nor points the way to a system capable of providing them. Disclosure of Invention

The present invention enables the customers of the issuers of travel cards to gain access to the issuer's DCO switching equipment so that PIN numbers can be deactivated as needed, voice messages can be left, calls can be re-routed, and the like, all without requiring the intervention of the card issuer.

It also provides card validation and account status checking prior to the termination of a call.

It even provides means for determining whether or not an apparently valid PIN really is valid.

The earlier system of the present inventor, mentioned briefly in the preceding Background Art discussion, prevented the customer of the issuer of the travel cards from controlling operation of the DCO switching equipment used by the issuer.

This was, in part, a result of the fact that the DCO switching equipment used by the issuer's system was owned by a third party and could not be accessed by the travel card user. Just as importantly, even if the DCO switching equipment was under the control of the travel card issuer, the prior art provided no suggestions as to how the travel card users, i.e., customers, could access the DCO switching equipment to their advantage.

Thus, it would be desirable if travel card customers could gain access to DCO switching equipment; this would enhance the versatility of the travel card issuer's system and provide innumerable benefits to the customers of the system.

These and other advantages are provided in the present system. The customer of the travel card issuer is in communication with and can access the DCO switching equipment under the control of said issuer and can instruct said switching equipment to perform as directed by the customer.

Personal computers (PCs) under the control of the card issuer and in communication with PCs of the customers of the issuer are an integral part of the DCO switching equipment so that the DCO may be programmed by the customers to perform a variety of functions having utility to the customers of the travel card issuer.

Accordingly, a customer desiring to deactivate one or all of its PINs may deactivate them from its home office by simple communication with the DCO switch through the issuer's PC. For example, most travel card customers will want to deactivate the PIN of an employee who is leaving the company for any reason, as mentioned earlier. If the customer wants to reroute the calls of certain sales people in the field, that also can be accomplished easily, and so on.

As a further example, if a home office wanted to leave a message with a salesperson in the field, the home office could access the DCO switching equipment and program it to activate an electronic voice mail device that would provide the message

to the salesperson when the salesperson made a call to any number with the travel card. Alternatively, the home office could program the switching equipment to re-route the salesperson's next call to the home office so that regardless of the number called by the person in the field, that call would be directed to the home office and the desired message could be delivered.

Moreover, the home office, i.e., the customer of the travel card issuer, could program the switching equipment to monitor any number of parameters and to validate or invalidate attempted calls as desired. For example, a company having no salespersons with authority to travel into certain territories could program the switching equipment to invalidate any call originating from a state or other geographical region within which the presence of no salesperson was authorized. This important feature would prevent the use of purloined travel card and PINs in those states that were screened out by the DCO switching equipment. Similarly, a west coast company could program the DCO equipment to reject all calls attempted before 8:00 A.M., PST and an east coast firm could cause all calls made after 5:00 P.M. EST to be rejected. This would curtail the use of purloined accounts by east coast and west coast thieves, respectively, before and after the respective times, and would provide the Company with information concerning the capture of its confidential numbers by hackers. Numerous other techniques could be employed to both foil and catch telephone thieves.

To provide these and other features, a communications port in the form of a digital communications path is added to DCO switching means under the control of the travel card issuer, and that port is connected to a personal computer and a backup, redundant personal computer owner by the issuer. Through the use of its own PC and standard programming techniques, each customer of the travel card user can program the issuer's PC to cause the DCO switching equipment to activate voice mail

messages, re-route calls, change the parameters for validating attempted calls, and the like.

Thus, the novel system includes a voice mail device that is connected to a personal computer controlled by the issuer and to the DCO switching equipment as well. If a home office travel card user decides that certain salespersons, for example, are not authorized to leave voice mail messages, the personal computer in the home office is used to program the issuer's PC to instruct the DCO switching equipment to refuse access to the voice mail device if the call thereto originates from an unauthorized travel card holder. In practice, the DCO equipment notifies the issuer's computer that a caller is attempting to activate the voice mail device. In response to this notification, the issuer's personal computer searches its memory to determine whether or not the particular caller holds an authorization to activate said voice mail device. The issuer's personal computer then sends a signal to the DCO switching equipment to either validate or invalidate the call so that the voice mail device may or may not be activated, respectively; importantly, the issuer's computer merely follows instructions as programmed into it by the user's computer or the user's telephones.

The DCO switching equipment notifies the issuer's personal computer of each and every incoming call. That PC checks its memory to validate the account number and the PIN, and either instructs the DCO equipment to complete the call as dialed, or to re-route the call to the home office, to the voice mail device, or the like, all as determined by the computer in the customer's home office.

The system relies upon a bank of monitoring computers that monitor usage of the system by all callers. All of the monitoring computers store information collected by them in a data storage server that is in communication with the issuer's personal computer and hence the DCO switching equipment.

The customer has access to the data storage server and, accordingly, can order billing information at any time, and can cause the billing information to be printed over a facsimile machine in the customer's home office.

The system is also accessible by cellular telephones.

It is therefore apparent that the primary object of this invention is to enable the user of a travel card system to control use of the system by its card holders for miscellaneous business advantages and to curtail travel card fraud and abuse.

Another important object is to enable travel card users to customize their travel card monitoring system to their particular requirements.

These and other important objects, features and advantages of the invention will become apparent as this description proceeds.

The invention accordingly comprises the features of construction, combination of elements and arrangement of parts that will be exemplified in the construction hereinafter set forth, and the scope of the invention will be indicated in the claims. Brief Description of the Drawing

For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description, taken in connection with the accompanying drawing, in which:

The Fig. is a block diagram of the novel system.

Best Modes for Carrying Out the Invention

Referring now to the Fig., it will there be seen that an illustrative embodiment of the novel telephone system is denoted as a whole by the reference numeral 10.

System 10 includes telephone booth 12 which represents any fixed position telephone booth having Touch Tone (trademark) capability; it also represents any out of town Touch Tone

telephone. A suitable telecommunications line 14 interconnects phone 12 and switching module 18.

The Digital Central Office (DCO) switch of the novel system is denoted 22 as a whole. In conventional telephone systems, the DCO switch includes switching module 18 and internal buffer 20; in the novel system, DCO switch 22 further includes digital communication path (DCP) 61, the function of which is hereinafter described.

Box 36 at the top of the Fig. denotes the Central Monitoring Office (CMO) that houses the DCO switch 18 in an unillustrated embodiment of the invention; the CMO 36 and the switching station 16 are shown remote from one another in the Fig. It should be understood that the CMO is owned by or under the control of the travel card issuer.

Line 19 in DCO switch 22 interconnects switching module 18 and internal buffer 20; that buffer serves as a temporary data storage means. Data carried by line 19 from switching module 18 to buffer 20 is captured at point 21 by capture software available from Utility Computer Co. of Monroe, Louisiana, or Info Systems of San Antonio, Texas, or other vendors. Any competent programmer having knowledge of the telecommunications industry can prepare a suitable capture program. Line 31 carries the captured data to "Y" block 64 which splits line 31 into the two depicted lines that go to PCs 32, 33.

Buffer 20 is connected to a more permanent data storage device such as a nine track tape, not shown. The CMO may further house a billing department 24 where the amounts due are tabulated, a printing department 26 where the bills are printed, and a billing station 28 from where the printed bills are distributed to the travel card users. The billing department 24 is depicted as being remote from the CMO in the Fig. Note line 72 that provides communication between billing department 24 and the data storage server 42 in the CMO 36.

Data is captured in real time and is input into the above- mentioned two way digital communications path (DCP) 61; the

capture is transparent to the system, i.e., the downloading of data from the switching module 18 to the internal buffer memory means 20 is unaffected by the capture. Note that the point of capture is upstream of point 21 in this particular embodiment. It should be noted that the capture of data at point 21 could also be accomplished by the DCP 61. A DCP is an optional port provided by manufacturers of DCO switches to bypass internal computers. Cable 62 electrically connects the DCP to digital conversion box (DCB) 63; that device converts digital signals to analog and vice versa.

Accordingly, real time data is made available to PCs 32 and 33; the DCP is connected to line 19 as shown and this connection enables the PCs to read and cross check all information transmitted through that line for PIN validity, voice mail, credit limits, re-routing instructions, and other parameters that may be selected by the customer of the travel card issuer.

When the validity of the call has been checked, PC 32 or its backup sends proper analog instructions back to the DCB, through its RS232 port (provided as standard equipment on IBM and IBM-compatible PCs) and the DCB converts said analog instructions into digital form so that it can be read into the DCP. These analog instructions are provided by the travel card customer and may originate from computer 46 in the customer's office 44 or from any Touch Tone phone 68. Based upon the content of the information thereby supplied to the DCO, the DCO may: 1) allow the call to proceed and terminate in the usual course, 2) pick up a voice mail intercept over line 67 prior to call termination, or 3) re-route the call in the manner directed by said customer. The X.25 board employed in the earlier system is no longer needed because modern DCO switching equipment is capable of supporting RS-232 asynchronous communications.

Digital information from switching module 18 is converted into analog information when it flows from the module 18 to the

PCs and from analog to digital when it flows from the PCs to the module 18. Significantly, the DCP provides access to the DCO switch to the travel card customer, as will be more fully set forth hereinafter.

The boxes denoted 64, of which there are four in this embodiment, are "Y" blocks; they are used to split signals to the primary computer 32 and the redundant computer 33 from DCB 63, and to split the signals to said PCs from all peripheral equipment as well. More particularly, as shown in the switching station box 16, the "Y" block on the left splits the signals from voice mail unit 66 to said PCs, the central "Y" block splits the signal from the DCB 63 as already mentioned, and the "Y" block on the right splits the signal from point 21 where the downloaded data is captured by the capture software in a manner that is transparent to the switching module 18 and the internal buffer 20, as mentioned above. The fourth "Y" block is in CMO 36 and splits the signal from data storage server 42 to PCs 32, 33.

Lines 34 and 35 interconnect computers 32 and 33, respectively, to a bank of monitoring computers in the CMO, said monitoring computers being collectively denoted 38. Each monitoring computer is connected to the other monitoring computers as shown and to data storage server 42 over line 39. Line 40 interconnects the monitoring computers and switching station 16.

Monitoring computers 38 continuously analyze all data in the system; the card issuer or the customer may order reports of interest at any time. For example, if management desires a print out of an individual salesperson's activities on Mondays only, the monitoring computers perform the task of analyzing all data and providing the requested report. The variety of management reports available are unlimited as long as appropriate software instructions are provided.

Note that remote Touch Tone phone 68 is connected to voice mail unit 66 through line 69, that line 65 interconnects unit

66 and line 19, and that line 67 connects voice mail unit 66 to "Y" box 64 and hence to the PCs 32 and 33. This allows any person having the proper clearance to broadcast messages over the voice mail unit. Connection 67 between the voice mail unit 66 and the PCs allows the PCs to verify whether or not the individual attempting to gain access to the voice mail unit 66 from any Touch Tone phone 68 is authorized to have such access; if the attempted access is authorized, the caller may leave any message for broadcast.

PC 32 checks all parameters on the front side of each call, including instructions to give a voice mail message to a predetermined caller. Thus, where an individual accesses the voice mail unit 66, the PC also checks to see if a message is to be delivered to that caller and if so, the message is delivered to the caller over line 69 through the voice mail unit 66. The time required to deliver the message is measured by PC 32, and said PC deletes the message from the voice unit 66 when said message has been delivered, unless the customer has programmed it to deliver the message to more than one caller. The PC then sends information concerning the message to data storage receiver 42 in the CMO; the information includes the date and time the message was delivered and to whom it was delivered. PC 32 then communicates with the DCO over line 62 and either validates the call as originally dialed, re-routes the call as provided by customer override instructions, or disallows the call if the caller has an insufficient credit balance, if the call is made from an area of the world where no valid phone calls can be made, and the like.

As mentioned earlier, the parameters which may invalidate a call are infinite, limited only by the imagination and requirements of the customer. For example, if no 900 calls are authorized, the customer, using standard programming, may instruct the issuer's PC 32 to instruct the DCO to disallow all 900 calls. Of course, all customers will program their PC to reject all calls using a PIN that is known to have been

purloined. Other customers can program their PC to disallow all international calls, to only allow calls from or to a certain area code or prefix, or to allow calls only to certain numbers, and so on as aforesaid. Where a card has been programmed to allow only calls to certain numbers, the computer could detect an unauthorized use of such a card easily if the card user attempts to call an unauthorized number.

To provide a still fuller understanding of the invention, the course of a single call will be followed. When a call is received by the DCO, the long distance carrier provides the novel system with an Automatic Numbering Identification (ANI) that includes the area code, the three number prefix and the four numbers that follow the prefix of the number of the telephone from which the call was placed. The caller then enters a preassigned PIN; these two numbers (the ANI and the PIN) constitute two items of information. These two items are immediately passed through the DCP 61 and thence to the DCB 63 through cable 62. The DCB converts the digital signals to analog for compatibility with PCs 32, 33.

PC 32 or its backup has an internal clock; accordingly, it adds the exact time of call origination to the two items of information already received, thereby making a total of three items of information now in the novel system. Call validity and processing is based upon these three items of data. First, PC 32 checks to see if the caller's PIN matches a valid PIN. If it does not, a signal instructing the DCO to not complete the call is sent back to the DCO along the same path from where the three items of data were received, and the DCO generates a message to the caller over a voice synthesizer that announces that the call will not be completed. The PC records in its memory that the call was attempted, i.e., all three items of data are stored. If two additional invalid calls are attempted from the same telephone (as indicated by the ANI) within a predetermined period of time, then the switching station personal computer 32 instructs the DCO to permanently block all

future call attempts made from that number. Three attempts to make invalid calls thus creates a presumption that the card user is not an authorized user. Of course, the permanent block could be applied after a second invalid call, or even after the first, fourth, or some other number as selected by the user of the novel system.

If the attempted call passes this preliminary test, i.e., it is from an authorized location and the PIN appears to be valid, the novel system takes still further precautions before processing the call. More particularly, the PC 32 checks to see if the PIN entered by the caller is already in use on another call. Since there is only one valid PIN per card, if a dual usage is detected, the system knows the confidentiality of the PIN has been breached, and the voice synthesizer is activated to tell the caller that the call will not be completed because the PIN is already in use on a different call.

If the dual use test is passed, the PC then reads its memory to determine when and from where the same caller placed his or her previous call. The time and location of the previous call is compared to the time and location of the attempted call, and a decision is made based on that information as to whether or not the previous call and the attempted call were made by the same individual. For example, if the PC 32 determines that the preceding call was placed from Boston and the attempted call is originating in St. Louis only an hour later, the attempted call is deemed fraudulent and the caller is advised that the call will not be completed. Further usage of that card can then be permanently blocked.

If all of these validity tests are passed, a signal is then sent to the DCO to complete the call if no customer- imposed limitations are in place. Of course, if customer- imposed limitations are present, such as call re-routing and the like, the DCO completes the call in accordance with the customer's requirements. Where a customer has programmed a card so that it can only call certain numbers, the PC 32, through

digital voice synthesizer 66, will prompt the caller to enter the number to be called before validating the call; of course, if the caller then enters an invalid number, the call is not completed and further attempts to use that card may be blocked.

Still another feature of the present invention is its ability to provide billing information to its users at any time; thus, no user of the novel system is compelled to wait for the completion of a thirty day billing cycle. Either computer 46 in the customer's office 44 or the customer's facsimile machine 70 may access data storage server 42 over lines 48 and 71, respectively; the server 42 is connected through "Y" connection 64 to PC 32. Thus, a user wanting to know the current billings attributed to a certain salesperson in the field, or all salespeople, or the like, may access computer 32 and be provided with a current bill. A hard copy thereof may be obtained through facsimile machine 70. In this way, a user of the novel system may keep track of its telephone charges on a weekly basis or even on a real time basis, or any other basis selected.

Similarly, a customer having a cellular phone 56 may access the data storage server 42 through any cellular network entity 58 and computer 60 dedicated thereto and thereby receive all of the benefits and safeguards provided to other system users.

Not only does the novel system include a switching module that is accessible to customers of the system, it also provides to the customer full information concerning the results of the controls imposed on the system by the customer such as calls attempted and completed or rejected pursuant to said controls. This information is available to the customer on a real time basis or as otherwise demanded by the customer. Moreover, the information may be delivered in any format and may include any data of interest to the customer or the travel card issuer.

The software that controls the operation of the novel system, known as Long Distance Service Software II, is commercially available from the present inventor.

This invention is clearly new and useful. Moreover, it was not obvious to those of ordinary skill in this art at the time it was made, in view of the prior art considered as a whole as required by law.

It will thus be seen that the objects set forth above, and those made apparent from the foregoing description, are efficiently attained and since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing construction or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Now that the invention has been described,