Method and apparatus for non-disruptive telecommunication...

Details Method and apparatus for non-disruptive telecommunication... Method and apparatus for non-disruptive telecommunication...

2011-08-09

2011-08-09

Briney, III, Walter F (Department: 2614)

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

C379S387010

Reexamination Certificate

active

07995743

ABSTRACT:
The invention provides a low cost, simple, circuit for detecting the condition of a telephone line.

REFERENCES:
patent: 5646558 (1997-07-01), Jamshidi
patent: 5727056 (1998-03-01), Lee
patent: 6160885 (2000-12-01), Scott et al.
patent: 6567520 (2003-05-01), Murphy et al.
patent: 6631190 (2003-10-01), Yamamoto et al.
patent: 7113587 (2006-09-01), Fischer et al.

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