VF Line fault isolation and diagnostic apparatus and method

Details VF Line fault isolation and diagnostic apparatus and method VF Line fault isolation and diagnostic apparatus and method

1984-05-02

1986-02-04

Schreyer, Stafford D.

1791753F, 179 84VF, H04M 332

Patent

active

045688028

ABSTRACT:
An addressed transmission line test system having bidirectional input and output lines with through connections in a quiescent state which is capable of recognizing properly addressed signals at either direction input for breaking the through connections and for allowing responses to commands sent from either direction for controlling the application of signals to the other direction.

REFERENCES:
patent: 4211920 (1980-07-01), Wakabayashi
patent: 4317010 (1982-02-01), Fillot
patent: 4484035 (1984-11-01), Graham et al.

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