FIELD: message exchange between data terminal equipment over various communication channels.
SUBSTANCE: newly introduced in prior-art device is digital signal-processing unit that implements modem function and enhanced reception reliability and executes extended communication program. Device for interfacing terminal data equipment and communication channel has interface, communication channel 9, memory unit 3, interface circuit 1, codec 8, digital processing unit 5, random-access memory 6, program processing memory 7, controller 3, and data/voice switching unit 13. Such device affords interaction between any data terminal equipment and channel-forming equipment of various communication channels.
EFFECT: enlarged functional capabilities.
9 cl, 1 dwg
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