Multiplex communications – Wide area network – Packet switching
Patent
1991-02-22
1993-10-12
Chin, Wellington
Multiplex communications
Wide area network
Packet switching
370 951, H04J 316
Patent
active
052532534
ABSTRACT:
A multisite network switch for a series of RF digital trunked radio transceivers and dispatcher consoles. The switch establishes audio communications between different sites and various dispatcher consoles. The multisite switch has a distributed architecture in which each node of the switch is supported by a microprocessor controlled card. This card has a communications controller that routes messages between the internal switch bus, an outside port and an interface processor that controls the audio slots in the switch. The communications controller receives control messages from the switch bus, but discards redundant slot status messages by checking a slot status bit map stored in a memory unit on the card.
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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.
Imron Wim A.
Kappagantula Satish
Chin Wellington
Ericsson - GE Mobile Communications Inc.
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