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

Udo Petri

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Circuit arrangement for signal and information conversion betwee

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Patent

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Voice controlled attenuation adjustment in telephone transmissio

Multiplex communications – Wide area network – Packet switching
Patent

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Profile ID: LFUS-PAI-P-45665

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