Terminal equipment for a multiplex carrier current telephone sys

Details Terminal equipment for a multiplex carrier current telephone sys Terminal equipment for a multiplex carrier current telephone sys

1977-08-02

1978-12-19

Claffy, Kathleen H.

1791706, 325 22, H04B 324

Patent

active

041307437

ABSTRACT:
The invention relates to terminal equipment for a carrier current multiplex system with a half echo-suppressor and a channel modem. The attenuator which is inserted in the transmission chain is disposed after a first modulation stage, thereby taking advantage of the propagation time of the filters of the modem to reduce the apparent reaction of the attenuator.

REFERENCES:
patent: 2251028 (1941-07-01), Barney
patent: 2258966 (1941-10-01), Bjornson
patent: 2295153 (1942-09-01), Bjornson
patent: 3397401 (1968-08-01), Winterbottom
patent: 3896273 (1975-07-01), Fariello
patent: 3942116 (1976-03-01), Ferguson
patent: 3985979 (1976-10-01), Durand et al.

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