Channel board for telephony transmission equipment using...

Details Channel board for telephony transmission equipment using... Channel board for telephony transmission equipment using...

H - Electricity

04

J

363/7

H04J 1/06 (2006.01)

Patent

CA 1061481

Abstract of the disclosure A channel board which simplifies wiring. Each channel board 30-31 comprises its own controlled carrier current generator for the formation of primary groups, and preferably also for the direct formation of the secondary groups from pre-modulated channels. The requisite carrier current is obtained by controlling the value of the divisor N in the frequency divider contained in the feed- back loop. The control of N is effected for example simply by inserting the channel board into its location or by providing in addition with a selector plug, or by means of loaded shift registers.

234587

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