4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. Testing of subscriber loop or terminal

Joseph E. Barron

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Arrangement for testing telephone subscriber line circuit via B-

Multiplex communications – Diagnostic testing – Using oam cells
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Telephone ringback test device and method

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Profile ID: LFUS-PAI-P-742489

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