Control channel interface circuit

Details Control channel interface circuit Control channel interface circuit

H - Electricity

04

Q

344/1

H04Q 1/20 (2006.01) H04Q 3/545 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1223323

- 33 - CONTROL CHANNEL INTERFACE CIRCUIT Abstract There is disclosed a control channel interface circuit for interfacing a port processor of a distributed multiprocessor communication system to a common time division multiplexed (TDM) bus (A,B). The detection, extraction and synchronization of control messages passed between a central processor and port processor via a TDM bus are handled by the interface unit thereby relieving a port processor of this burden. A group of control time slots within a system frame are dedicated to the transfer of control messages between port processors and a central processor. The interface unit also monitors the operability of a respective port processor and automatically disables a faulty processor.

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