Telecommunication device

Details Telecommunication device Telecommunication device

1995-02-16

1997-12-16

Zele, Krista M.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379373, 379377, 379413, H04M 1900

Patent

active

056994222

ABSTRACT:
A telecommunications device (10) includes an input terminal (12,13) for coupling to an input line of a telecommunications network. A detection arrangement (17, 18, 23) is coupled to the input terminal (12,13) for providing an output voltage in response to a voltage on the input line exceeding a threshold level. An output terminal (21) is coupled to receive the output voltage from the detection arrangement (17, 18). The detection arrangement (17, 18) includes a control arrangement (17) for setting the threshold level in response to a received control signal (19).

REFERENCES:
patent: 3958086 (1976-05-01), Calcagno et al.
patent: 3974342 (1976-08-01), Wagner
patent: 4287392 (1981-09-01), Melindo
patent: 4319181 (1982-03-01), Wrathall
patent: 4417099 (1983-11-01), Pierce
patent: 4803719 (1989-02-01), Ulrich
patent: 5134403 (1992-07-01), Rush
patent: 5262713 (1993-11-01), Agiman
patent: 5325427 (1994-06-01), Dighe
patent: 5500894 (1996-03-01), Hershbarger

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