4. Telephonic communications
  5. Supervisory or control line signaling
  6. Using line or loop condition detection

Raymond L. Ruggerio

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Alerting feature for RF availability of mobile subscriber

Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate

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Method of determining answer supervision at a line...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2767694

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