Patent
1978-02-06
1979-12-11
Brown, Thomas W.
179 15AQ, 179 18ES, H04J 312, H04Q 354
Patent
active
041784790
ABSTRACT:
Communication processor apparatus for use in a TDM telephone system operating in a multiframe format consisting of a plurality of time frames where each time frame consists of a plurality of time slots having a time slot rate and where the plurality of frames includes signaling frames having supervisory signals where the supervisory signals occur as a signaling bit during each time slot in the signaling frame. The telephone system includes a base switch connected to a plurality of multitime slot data buses for switching encoded data between specified time slots on the buses and also includes a subscriber switch for connecting a plurality of local subscriber lines to time slots on a pair of the buses. The communication processor provides a communications link between the base switch and the subscriber switch and includes a receiver for receiving signaling bits during alternate signaling frames in the form of a message on one of the buses and a transmitter for transmitting sequential signaling bits during a selected signaling frame in the form of a second message on a multitime slot data bus. A central processing unit provides control of the operation of the communication processor.
REFERENCES:
patent: 3912873 (1975-10-01), Skaperda
patent: 4069399 (1978-01-01), Barrett et al.
Baichtal James R.
McDonald John C.
Schaffter Craig D.
Brown Thomas W.
TRW Inc.
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