Transmultiplexer virtual group distribution frame

Multiplex communications – Wide area network – Packet switching

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370 53, H04J 400

Patent

active

048130354

ABSTRACT:
A transmultiplexer for use in a telephone system is disclosed. The transmultiplexer includes a programmable virtual distribution frame feature which provides for information traffic to be switched from one digital group facility to another analog facility in both time division multiplexed and frequency division multiplexed directions.

REFERENCES:
patent: 3585306 (1971-06-01), Battocletti et al.
patent: 4075429 (1978-02-01), Takahata et al.
patent: 4117541 (1978-09-01), Ali
patent: 4131766 (1978-12-01), Narashimha
patent: 4199660 (1980-04-01), Dill et al.
patent: 4237551 (1980-12-01), Narashimha
Correspondence letter from Granger Assoc. to AT&T; Sopira; pp. 1-6; Jun. 12, 1985.

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