Multiplex communications – Wide area network – Packet switching
Patent
1986-11-04
1989-03-14
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
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.
Bishop H. John
Merriss Morley M.
Ohlsson Thomas L.
Sopira Terrence G.
Granger Associates
Olms Douglas W.
Scutch III Frank M.
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