Testing of subscriber lines in a digital switch

Details Testing of subscriber lines in a digital switch Testing of subscriber lines in a digital switch

1994-03-31

1995-08-29

Chin, Stephen

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

With blocking of normal usage

379 2, 379 5, 379 26, 379 27, 379 29, 379 30, H04M 124, H04M 308, H04M 322

Patent

active

054467810

ABSTRACT:
A device for testing line connections at a telephone exchange includes a combined generator and comparator for generating a bit sequence of pseudo-random type and for comparing a received bit sequence to a generated bit sequence. A generated bit sequence is through a line connection forwarded to a telephone set and back again to the generator and comparator, where the received sequence is compared to the forwarded one. The number of bit errors occurring in the transmission is a measure of the transmission quality of the connection. A selector device selects one of several line connections which is to be tested. Only one testing device is required for testing a number of line connections which through the same pair of one serial output line and one serial input line are connected to a telephone exchange.

REFERENCES:
patent: 4070554 (1978-01-01), Rule et al.
patent: 4207433 (1980-06-01), Bartholomay
patent: 4660194 (1987-03-01), Larson
patent: 4688209 (1987-08-01), Banzi
patent: 4766594 (1988-08-01), Ogawa
patent: 4943993 (1990-07-01), Fore
patent: 5081666 (1992-01-01), Blaschek
patent: 5166923 (1992-11-01), Ohmori
patent: 5274692 (1993-12-01), Lechner

Affiliated with

Also associated with

Rating

Testing of subscriber lines in a digital switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Testing of subscriber lines in a digital switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing of subscriber lines in a digital switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1825745