Electronic voice network for a telephone subscriber's...

Details Electronic voice network for a telephone subscriber's... Electronic voice network for a telephone subscriber's...

H - Electricity

04

M

379/73

H04M 1/00 (2006.01) H04M 1/58 (2006.01) H04M 1/76 (2006.01)

Patent

CA 1186084

TITLE AN ELECTRONIC VOICE NETWORK FOR A TELEPHONE SUBSCRIBER'S SUBSTATION ABSTRACT A circuit which performs loop supervision, transmit, receive, and transmit and receive regulation and sidetone balance. A loading circuit shunts excess current from the transmit and receive circuits under short loop conditions. The loading circuit also controls regulation of the transmit and receive circuits. Use of constant current power supplies external to the transmit and receive circuits prevents modulation of the power supplies.

402091

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