Telephone terminal device

Details Telephone terminal device Telephone terminal device

1990-08-28

1992-10-20

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 88, 379413, 379211, 379357, H04M 164, H04M 1100, H04M 106, H04M 342

Patent

active

051577119

ABSTRACT:
A telephone terminal device in connection with an office line, comprises: (a) an office line acquisition unit for acquiring the office line; (b) an office line acquisition controller responsive to a call signal sent through the office line, for driving the office line acquisition unit by call signal power; and a power supply unit responsive to DC power supplied through the office line acquired by the office line acquisition unit, for supplying the supplied DC power to the telephone terminal device as device driving power. The telephone terminal device utilizes DC power supplied from a telephone exchange office through a telephone line so that built-in backup batteries are consumed at the lowest possible consumption rate.

REFERENCES:
patent: 4413158 (1983-11-01), Danford
patent: 4647787 (1987-03-01), Pommer, II
patent: 4682169 (1987-07-01), Swanson
patent: 4794638 (1988-12-01), Millett
patent: 4803719 (1989-02-01), Ulrich

Affiliated with

Also associated with

Rating

Telephone terminal device 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 terminal device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone terminal device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-199140