Multiplex communications – Wide area network – Packet switching
Patent
1983-06-09
1985-10-15
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 84, H04Q 1104, H04J 316
Patent
active
045478775
ABSTRACT:
A system for efficiently switching time multiplexed digital signals of different bit rates. A switch is described including switch modules each of which can switch data and/or voice 56 kilobit/second (kb) full-rate channels and 2.4 kb, 4.8 kb, and 9.6 kb subrate channels. All signals from incoming channels are stored in a signal memory and are transmitted to outgoing channels under the control of addresses stored in a control memory. The frame offset of each channel with respect to a standard superframe is detected and used to calculate the addresses to be stored in the control memory. Various arrangements are shown to minimize high speed signal and control memory requirements, and to simplify the process of generating control memory contents.
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Translation of first part of French Patent 2,265,227 by FASST Translation Service, Teaneck, New Jersey.
Lehman Harvey R.
Slana Matthew F.
AT&T Bell Laboratories
Chin Wellington
Olms Douglas W.
Visserman Peter
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