4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. Testing of network terminating interface, subscriber trunk...

Phillip K. Freyman

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Method and system for processing tones to reduce false...

Multiplex communications – Diagnostic testing – Determination of communication parameters
Reexamination Certificate

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Method and system for testing subscriber circuits and wiring in

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of network terminating interface – subscriber trunk...
Patent

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Profile ID: LFUS-PAI-P-1430913

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