Telephone exchange apparatus

Details Telephone exchange apparatus Telephone exchange apparatus

1992-04-22

1995-11-14

Hofsass, Jeffery A.

Telephonic communications

Subscriber line or transmission line interface

379339, 379351, 379277, 3701103, H04M 1900

Patent

active

054673950

ABSTRACT:
When there is an incoming call to a digital line and the digital line is to be connected to a digital terminal, a CPU connects the line and the terminal directly. When the digital line is to be connected to an analog individual line telephone or the like, the line and the terminal are connected via a level controller. The level controller shifts, to an appropriate level, the level of a voice signal represented by data received from the digital line, and the analog individual line telephone or the like connected to the extension receives the voice signal shifted to the appropriate level.

REFERENCES:
patent: 4479188 (1984-10-01), de Keijzer
patent: 4575584 (1986-03-01), Smith et al.
patent: 4953200 (1990-08-01), Yamasaki
patent: 5070524 (1991-12-01), Mano
patent: 5155772 (1992-10-01), Branoman et al.
patent: 5163050 (1992-11-01), Cromack
patent: 5163079 (1992-11-01), Crowdis
patent: 5175764 (1992-12-01), Patel et al.
patent: 5214693 (1993-05-01), Chujo
patent: 5216704 (1993-06-01), Williams et al.
patent: 5323460 (1994-06-01), Warner et al.
patent: 5341417 (1994-08-01), Hwang et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1226666