4. Multiplex communications
  5. Wide area network
  6. Packet switching

Masayoshi Hiraguchi

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Automatic retrain method for a full duplex modem having an echo

Multiplex communications – Wide area network – Packet switching
Patent

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Full duplex modem having two echo cancellers for a near end echo

Multiplex communications – Wide area network – Packet switching
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Start-stop synchronous communication speed detecting apparatus

Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Measuring or testing
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Profile ID: LFUS-PAI-P-1742806

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