Parallel operation of telephone equipment on a digital loop

Details Parallel operation of telephone equipment on a digital loop Parallel operation of telephone equipment on a digital loop

H - Electricity

04

J

363/12

H04J 3/02 (2006.01) H04M 9/02 (2006.01) H04Q 5/02 (2006.01)

Patent

CA 1153137

PARALLEL OPERATION OF TELEPHONE EQUIPMENT ON A DIGITAL LOOP Abstract of the Disclosure Disclosed is a digital station apparatus, such as a digital telephone set, capable of being operated in parallel on a subscriber's digital loop (e.g. in an extension mode) without the need to route all the PCM signals to commom equipment. Only one of the parallel sets is active at a time, all the others are passive. In the passive state the telephone set receives only, and does not transmit. It monitors its own signal magnitude relative to the signal magnitude produced by the active "extension" on the same digital loop. When its own signal magnitude has satisfied a comparison criterion, then that passive set becomes active and both transmits and receives, while all other sets on the loop are passive.

371926

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