Radio key telephone system having a common signaling channel

Details Radio key telephone system having a common signaling channel Radio key telephone system having a common signaling channel

1987-04-27

1988-08-30

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

379 63, H04M 1100

Patent

active

047682183

ABSTRACT:
In a radio key telephone system connected through N subscriber lines to a telecommunication switching system, each of M (where M is larger than N) terminal stations has a multiple access radio transceiver capable of switching to one of (N+1) radio channels including N two-way communication channels and a two-way signaling channel, a display for indicating busy-idle states of the subscriber lines and a controller for controlling the display. A base station establishes the N two-way communication channels and the two-way signaling channel and includes a controller which interacts with the terminal-station controllers through the signaling channel in response to originating and terminating call-request signals to cause the displays of the terminal stations to indicate a busy state of a subscriber line and cause the transceiver of a terminal station to switch to the communication channel associated with that subscriber line and interacts with them through that communication channel in response to call-clearing signals to cause the transceiver of that terminal station to return to the signaling channel and cause the displays of the terminal stations to indicate an idle state of that subscriber line.

REFERENCES:
patent: 4538028 (1985-08-01), Gazzoli et al.
patent: 4538029 (1985-08-01), Gazzoli et al.
patent: 4628152 (1986-12-01), Akerberg
patent: 4640987 (1987-02-01), Tsukada
patent: 4646345 (1987-02-01), Zounek et al.
patent: 4656653 (1987-04-01), Oda et al.
patent: 4658416 (1987-04-01), Tanaka
patent: 4659878 (1987-04-01), Dinkins
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4694485 (1987-09-01), Iwase
patent: 4706274 (1987-11-01), Baker

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