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Measurement of transmission quality of a telephone channel

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method and apparatus for dispatching services

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method and apparatus for testing cables

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method for measuring quality determining parameters of a firmly

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method for measuring the bit error rate in the transmission of d

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method for performing continuity check in an electronic exchange

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method for testing the line connection before switching from a t

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method of adapting processing parameters in a call processing sy

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method of controlling time switch for diagnosing failure on call

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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Method of rapidly assessing damage to outside loop plant

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
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