Multiplex communications – Wide area network – Packet switching
Patent
1991-02-22
1993-08-24
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 67, 370 851, 370 859, 370 8511, 379 58, 379 59, 379 63, 455 331, 455 334, H04J 302
Patent
active
052395383
ABSTRACT:
A radio frequency (RF) signal transmission system is interconnected by a multisite switch that routes command and audio transmission signals between the RF systems. The multisite switch has a distributed architecture of nodes wherein each node is coupled to one of the RF systems, such as a site controller or dispatcher console. Each of the switch nodes has a common architecture in which a single controller board operates a plurality of audio boards. In addition, the controller board has two principal processors that communicate with each other via a dual-port RAM.
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Motorola Centracom Series II Control Center Systems, Field Maintenance Manual, Jun. 5, 1985.
Brame Charles P.
Cree Timothy F.
Gulliford Philip C.
Improm Wim A.
Teel, Jr. James L.
Blum Russell W.
Ericsson Ge Mobile Communications, Inc.
Olms Douglas W.
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