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

Andrew D Wallace

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Continuity of voice carried over DSL during power failure

Telephonic communications – Subscriber line or transmission line interface – Power supply
Reexamination Certificate

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Lifeline telephony provision for voice over digital...

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

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Method of and apparatus for determining the capacity of a...

Pulse or digital communications – Testing – Signal noise
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2073768

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