Test system for detecting ISDN NT1-U interfaces

Details Test system for detecting ISDN NT1-U interfaces Test system for detecting ISDN NT1-U interfaces

1995-07-25

1997-06-03

Hsu, Alpus H.

Multiplex communications

Diagnostic testing

Using oam cells

379 29, 370524, H04B 1008

Patent

active

056362021

ABSTRACT:
The invention is a test method for testing ISDN interfaces from a remote location. The test method of the invention applies predetermined energy signals to the tip and ring leads of the customer subscriber line in a prescribed sequence, delays 10 to 100 ms, and then makes measurements of the voltage across the tip and ring leads. The voltage measurements are compared to limit values identified from the NT1-U dc characteristic curve to determine pass/fail of the tested interface.

REFERENCES:
patent: 4592048 (1986-05-01), Beckner et al.
patent: 4870675 (1989-09-01), Fuller et al.
patent: 5054050 (1991-10-01), Burke et al.
patent: 5208846 (1993-05-01), Hammond et al.
patent: 5301050 (1994-04-01), Czerwiec et al.
patent: 5440610 (1995-08-01), Schillaci et al.
patent: 5444759 (1995-08-01), Vogt, III et al.
patent: 5528679 (1996-06-01), Taarud
M. E. Burke et al., "Channel and Drop Testing in the SLC(R) Series 5 Carrier Fiber-To-The-Home Feature", National Fiber Optics Engineers Conference, Apr. 4, 1991, pp. 1-7 & Figs. 1-5.
SLC(R) Series 5 Carriet System, AUA411 Channel and Drop Test Unit--5SPQAA3, AT&T Data Sheet, AT&T 363-005-275, Issue 2, Mar. 1994, pp. 1-4.

Affiliated with

Also associated with

Rating

Test system for detecting ISDN NT1-U interfaces does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Test system for detecting ISDN NT1-U interfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Test system for detecting ISDN NT1-U interfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-397123