Method and apparatus for measuring electrical properties of...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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C379S029030, C379S030000

Reexamination Certificate

active

08081736

ABSTRACT:
A method and an apparatus for measuring electrical properties of communication lines is presented, wherein the communication line comprises a first line and a second line, wherein the first line is connected to a first line driver and the second line is connected to a second line driver. At least one measurement for determining said properties of said communication line is performed with the first line driver or the second line driver set to a high impedance state. With this method and apparatus, detailed line testing can be performed without the need for additional elements in a communication circuit.

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