Alarm and test system for a digital added main line

Details Alarm and test system for a digital added main line Alarm and test system for a digital added main line

1993-02-01

1995-04-04

Chin, Stephen

Telephonic communications

Terminal accessory or auxiliary equipment

With circuit connection to terminal

379412, 379 27, 379453, 428 357, 361641, H04M 308, H04M 100, H04M 126, B29D 2200

Patent

active

054044014

ABSTRACT:
A test system directed to apparatus for transmitting and receiving multiple telephone transmission signals over a single twisted pair. The system converts an analog signal from a local switching station to an 80 ksymbols/sec signal for transmission over a twisted pair by a line card. A remote terminal converts the 80 ksymbols/sec signal back into a conventional analog signal for use in conventional telephone, facsimile or other related equipment. The test equipment separately tests the entire system, the line card portion of the system, the remote terminal portion of the system, and the twisted pair.

REFERENCES:
patent: 4425017 (1984-01-01), Chan
patent: 4634207 (1987-01-01), Debbauj
patent: 4642924 (1987-02-01), Uken et al.
patent: 4864725 (1989-09-01), Debbaut
patent: 4917617 (1990-04-01), Smith
patent: 4927386 (1990-05-01), Neuroth
patent: 4942270 (1990-07-01), Gamerra
patent: 4945560 (1990-07-01), Collins et al.
patent: 4998894 (1991-03-01), Gronvall
patent: 5111497 (1992-05-01), Bliven et al.
patent: 5130818 (1992-07-01), Tadukoro
patent: 5140746 (1992-08-01), Debbaut
patent: 5202919 (1993-04-01), Kiko
patent: 5228018 (1993-07-01), Warner et al.
patent: 5235638 (1993-08-01), Dondero

Affiliated with

Also associated with

Rating

Alarm and test system for a digital added main line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm and test system for a digital added main line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm and test system for a digital added main line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2384532