Electronic voice network for a telephone subscriber's substation

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

1981-06-15

1983-08-23

Rubinson, G. Z.

179 16F, H04M 100, H04M 176

Patent

active

044005881

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.

REFERENCES:
patent: 3789155 (1974-01-01), Fensom
patent: 4143247 (1979-03-01), Yoshitoshi et al.
patent: 4332984 (1982-06-01), Davis et al.

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