H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/25
H04Q 11/04 (2006.01) H04J 3/06 (2006.01)
Patent
CA 1124823
-23- TIMING SIGNAL GENERATION AND DISTRIBUTION SYSTEM FOR TDM TELECOMMUNICATIONS SYSTEMS ABSTRACT Synchronous operation of any number of digital switching units of a TDM system is maintained by interconnecting the switching units to a timing signal highway which distributes timing signals generated by sources of such signals in any one of the units. The units are connected successively in a chain by timing signal distribution control lines. Validity signals are generated and transmitted by circuits in each unit along the lines so as to provide for transmission of timing signals generated in the first switching unit on to the timing signal highway and switch over of the timing signal generating function to successive ones of the units when the timing signal generation in preceding units becomes faulty. ML 0066
346970
Breidenstein Charles J.
Caplan Jerome S.
Littlefield Bruce G.
Bereskin & Parr
Redcom Laboratories Inc.
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