| Document |
Document Title |
|
JPS546819U |
|
|
JPS54723B2 |
1410508 Multi-station systems THORNERICSSON TELECOMMUNICATIONS (MFG) Ltd 10 Oct 1973 [12 Oct 1972] 47160/72 Heading H4K In an intercommunication system wherein a plurality of telephone stations have access to an equal or smaller number o...
|
|
JPS544505A |
PURPOSE: To simplify maintenance by making it possible to regulate both the originating and terminating of either one of two-party-line subscribes by providing a control relay inside a two-party-line bothway stopping device.
|
|
JPS544007A |
PURPOSE: To eliminate the difficulty of line alteration and failure detection, by picking up the common identifying circuit from the common control unit and by commonly using the common identifying circuit every line.
|
|
JPS53123009A |
PURPOSE: To make an outgoing and incoming efficiently by providing control circuits between a main equipment and each slave telephone set in apartments.
|
|
JPS53130918U |
|
|
JPS5336968B2 |
|
|
JPS53109408A |
PURPOSE: To make small the circuit size and to make light for the weight, by performing the identification of calling party stably and less in restriction due to line length, through the detection of presence of current in battery line.
|
|
JPS53117108U |
|
|
JPS5333007B2 |
|
|
JPS53101913A |
PURPOSE: To make the selective call possible and to realize the two-party line in the subscriber's circuit system which generates and transmits a bell signal with the transmission polarity of the station power inverted repeatedly.
|
|
JPS5394708A |
PURPOSE: To enable a calling subscriber to confirm the connection by sending a connection complete signal as to the mutual connection between common subscribers.
|
|
JPS5324127B2 |
|
|
JPS5378906U |
|
|
JPS5319164B2 |
|
|
JPS5364406A |
PURPOSE: To make all radio stations wait for the corresponding radio circuit by switching the antenna signal which is sent to a radio station from the base station via a radio circuit into the corresponding code at the general command se...
|
|
JPS5321444Y2 |
|
|
JPS5357725U |
|
|
JPS5351908A |
PURPOSE: To enable the identification of call by two common seven subscribers, by inverting the polarity of the station power supply.
|
|
JPS5312406B2 |
|
|
JPS5342613A |
PURPOSE: To prevent the level deterioration of the coded call signal, obtained through the switching control of a circuit part for the call signal and response supervision, to several party lines by time-limit-supervising the impulse cal...
|
|
JPS5335406A |
|
|
JPS536804B2 |
|
|
JPS535083B2 |
|
|
JPS534368B1 |
|
|
JPS534812U |
|
|
JPS5248441B1 |
|
|
JPS52147906A |
PURPOSE: To have an economical reduction of the transmission signal line number for electronic converters, etc, by using the signal lines in common for the signal transmission between control units.
|
|
JPS5247962B2 |
|
|
JPS52146508A |
PURPOSE: To realize the economical communication which can provide the capability of calling and talking between the branch-connected telephone set.
|
|
JPS5247642B2 |
|
|
JPS5245443B2 |
|
|
JPS5244482B2 |
|
|
JPS5244164B2 |
|
|
JPS5247924Y2 |
|
|
JPS5247923Y2 |
|
|
JPS5243041B1 |
|
|
JPS52122010A |
PURPOSE: To reduce the invalid calling rate by informing the caled subscriber that the call is under the reverting call by sending the special identification tone etc. to the called subscriber at the called subscriber response time.
|
|
JPS5238686B2 |
|
|
JPS5237925B2 |
|
|
JPS5237929B2 |
|
|
JPS52113607A |
PURPOSE: To eliminate the complexity of a transmission register circuit and the redundancy of installation number of party line discrimination circuits by providing an exclusive party line discrimination device.
|
|
JPS5240647Y2 |
|
|
JPS5226848B2 |
|
|
JPS5284904A |
PURPOSE: To release transmission quality variation from the length of transmission line to provide the same quality service with all subscribers by digitally multiplexing the line between central equipment and concentrator in the vicinty...
|
|
JPS5284905A |
PURPOSE: To provide each subscriber with driving power to save wires for subscribers and to reduce cross talk fault for subscribers by providing a concentrator in the vicinity of the subscribers.
|
|
JPS5228401Y2 |
|
|
JPS5221845B2 |
|
|
JPS5269507A |
PURPOSE: To obtain an equipment which has a high resistivity against surge voltage, etc. through composition of selection circuit using simple structure relay for wire telephone broadcast equipment etc.
|
|
JPS5219723B2 |
|
