Apparatus and method for testing subscriber loop interface...

Details Apparatus and method for testing subscriber loop interface... Apparatus and method for testing subscriber loop interface...

2006-03-28

2006-03-28

Barnie, Rexford (Department: 2643)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

C379S001010, C379S029040, C379S026020, C379S027040, C379S026010

Reexamination Certificate

active

07020248

ABSTRACT:
A method and apparatus for internally testing portions of a subscriber loop interface circuit. Testing may be conducted on a semiconductor circuit including the subscriber loop interface circuit. The portion of the subscriber loop interface circuit being tested may be the ring trip detector and/or the off-hook detect circuit. Testing may be conducted without disabling the capability of the subscriber loop interface circuit to monitor the hook status of a subscriber.

REFERENCES:
patent: 4860332 (1989-08-01), Chism
patent: 5659570 (1997-08-01), Cotreau et al.
patent: 5854839 (1998-12-01), Chen et al.
patent: 6144722 (2000-11-01), Anderson et al.

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