Redundancy clock supply module for exchange system

Details Redundancy clock supply module for exchange system Redundancy clock supply module for exchange system

1996-10-15

1999-03-09

Tse, Young T.

Pulse or digital communications

Synchronizers

375356, 375371, 327142, 327145, 327151, H04L 700

Patent

active

058811133

ABSTRACT:
An exchange system comprising a plurality of redundant clock supply modules for receiving respective clock signals to maintain synchronization. Each redundant clock supply module includes a phase locked loop coupled to receive a network synchronizing reference signal, for generating a most significant clock of the exchange system synchronized to the network synchronizing reference signal; a clock generator for counting the most significant clock to generate a plurality of system clocks including a least significant clock and a first frame pulse; and a redundancy synchronizer for synchronizing the first frame pulse and a second frame pulse from a counterpart redundancy module to generate a redundancy synchronization signal for establishing synchronization between redundancy modules from the most significant clock to the least significant clock.

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