Telecommunication line termination test
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United States of America Patent
Stats
-
Jan 2, 2001
Grant Date -
N/A
app pub date -
Sep 1, 1998
filing date -
Sep 2, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a 2-wire connection from a telephone exchange to a subscriber, the connection is made via a subscriber line interface circuit (SLIC) and a termination box, the termination box having a capacitor and a resistor connected in series between the two wires of the connection and between the SLIC and the subscriber. The SLIC includes means to reverse the polarity between the two wires of the connection and there is measuring means whereby the current required to change the capacitor to the opposite polarity may be measured enabling determination of the impedance between the two wires of the connection.
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