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

Coherent Communications Systems Corp.

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Automatic echo cancellation for an integrated services digital n

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Bi-directional asynchronous telecommunication audio signal proce

Multiplex communications – Duplex – Transmit/receive interaction control
Patent

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Compact speakerphone apparatus

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Mounting or support feature of housed loudspeaker
Patent

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Echo canceler with subband attenuation and noise injection contr

Multiplex communications – Wide area network – Packet switching
Patent

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Full-duplex adapter for PBX telephone system

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

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Profile ID: LFUS-PAI-P-365366

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