Multiplex communications – Wide area network – Packet switching
Patent
1989-08-03
1991-03-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 84, 370102, H04J 307
Patent
active
050017110
ABSTRACT:
A complex multiplexer/demultiplexer apparatus which converts input low order group data signals to middle order group data signals and multiplexes them to high order group data signals and converts high order group data signals to middle order group data signals and demultiplexes them to low order group data signals, wherein a plurality of low order group channels are processed by multiplexing and demultiplexing at a second clock bit synchronized with a first clock on the high order group side, the second clock including empty bits, and the bit rate being set lower than the first clock, and signal speeds between each of first multiplexers and a second multiplexer and between a first demultiplexer and each of second demultiplexers are converted by insertion and deletion of the empty bits which may have inserted therein additional information.
REFERENCES:
patent: 4224473 (1980-09-01), Kaul et al.
patent: 4589108 (1986-05-01), Billy
patent: 4727542 (1988-02-01), Rokugo et al.
patent: 4807221 (1989-02-01), Stummer
patent: 4811341 (1989-03-01), Fujimoto et al.
Hiramoto Masanori
Obana Yuji
Fujitsu Limited
Hsu Alpus H.
Olms Douglas W.
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