Synchronous ring detector for station carrier telephone systems

Details Synchronous ring detector for station carrier telephone systems Synchronous ring detector for station carrier telephone systems

1977-01-28

1978-03-28

Claffy, Kathleen H.

179 84SS, H04H 104

Patent

active

040816095

ABSTRACT:
A plural channel amplitude modulated station carrier signalling circuit in which an incoming call for a subscriber served by the station carrier system is sensed at the called subscriber's subscriber channel terminal circuit by synchronously detecting a signal which originates from a central office to signal the incoming call for the subscriber.

REFERENCES:
patent: 4002838 (1977-01-01), Bosik

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