Apparatus for distinguishing between failures in a digital trans

Details Apparatus for distinguishing between failures in a digital trans Apparatus for distinguishing between failures in a digital trans

1977-03-11

1978-06-20

Stewart, David L.

179 15BS, H04J 314

Patent

active

040963543

ABSTRACT:
At a channel bank, such as a D-type channel bank used in the Bell System, a steady visual alarm is exhibited if the source of a detected failure is at a location either within the channel bank or in the digital hierarchy of a digital transmission network. Unfortunately, a craftsperson is unable to distinguish between the two failure locations. To distinguish between the locations, apparatus for indicating the failure location to be in the hierarchy is situated between the hierarchy and the channel bank and, responsive to an alarm failure signal from the hierarchy, extends a predetermined cyclic code signal to the channel bank. Without modification of the channel bank and responsive to the code signal, a cyclic visual alarm in lieu of the prior art steady alarm is provided thereat.

REFERENCES:
patent: 3112370 (1963-11-01), Longton
patent: 3725593 (1973-04-01), Palombari
patent: 3996423 (1976-12-01), Colton

Affiliated with

Also associated with

Rating

Apparatus for distinguishing between failures in a digital trans does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for distinguishing between failures in a digital trans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for distinguishing between failures in a digital trans will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1135779