4. Multiplex communications
  5. Duplex
  6. Transmit/receive interaction control

Haixiang Liang

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Apparatus, method and software for call-waiting tone detection

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
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Call-waiting tone detection technique

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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Call-waiting tone detection technique

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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Categorization of impairments affecting a communication channel

Pulse or digital communications – Pulse code modulation – Noise or distortion reduction
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Data scrambler generation of pseudo-random bit sequence for...

Pulse or digital communications – Transmitters
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Profile ID: LFUS-PAI-P-1475711

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