Telephone subscribers' circuits

Details Telephone subscribers' circuits Telephone subscribers' circuits

1985-06-21

1987-02-03

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379361, H04M 100

Patent

active

046409939

ABSTRACT:
A transmission chip for a telephone subscriber's instrument can be used in a variety of modes, some of which involve use with other chips. Depending on which mode is in force, different amplifiers are used. Thus for plain ordinary telephone (POT) service, amplifiers 30,35 and 43 are used, for loudspeaking mode amplifiers 30, 35 and 43 are used, for handsfree use amplifiers 35, 43 and 46 are used, while for VF "dialling" amplifier 46 is used. To save power, the control block (42) detects the mode in which the set is operating and, via a control bus, operates electronic switches to disable the amplifiers not needed.

REFERENCES:
patent: 4409665 (1983-10-01), Tubbs
patent: 4488006 (1984-12-01), Essig et al.

Affiliated with

Also associated with

Rating

Telephone subscribers' circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone subscribers' circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone subscribers' circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1092216