Multipurpose analog telephony channel test facility method and a

Details Multipurpose analog telephony channel test facility method and a Multipurpose analog telephony channel test facility method and a

1993-08-12

1995-06-13

Chin, Stephen

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of centralized switching system

379 12, 379 2, 379 15, H04M 124, H04M 308, H04M 322

Patent

active

054250757

ABSTRACT:
A method and apparatus for determining whether a telephony system malfunction is caused by defective telephone company trunk lines connected thereto, or caused by defective system equipment. The present invention comprises two double pole double throw relays having connections arranged whereby a pair of telephony equipment interface channels have multiple remote testing capabilities. The present invention performs trunk rolling and/or inter-channel loop back testing under local or remote control.

REFERENCES:
patent: 4317967 (1982-03-01), DeVries et al.
patent: 4451708 (1984-05-01), Kemler et al.
patent: 4631368 (1986-12-01), Fisler
patent: 4794632 (1988-12-01), Burton et al.
patent: 5001741 (1991-03-01), Sayer
patent: 5123041 (1992-06-01), Brinkmoeller
patent: 5146474 (1992-09-01), Nagler et al.

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