4. Telephonic communications
  5. Subscriber line or transmission line interface

Piet B. Hesdahl

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Digital telephone communication system including an exchange and

Multiplex communications – Wide area network – Packet switching
Patent

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Method and device for activating a voice-controlled function...

Telephonic communications – Audio message storage – retrieval – or synthesis – Voice activation or recognition
Reexamination Certificate

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Method of establishing a data link between a pair of terminals a

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

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Telecommunication system and a linecard

Telephonic communications – Subscriber line or transmission line interface
Patent

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Profile ID: LFUS-PAI-P-637601

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