Multiplex communications – Wide area network – Packet switching
Patent
1989-12-13
1992-10-06
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 8514, H04J 302
Patent
active
051538768
ABSTRACT:
A network topography and associated protocol for exchanging data and control information between stations arranged in a daisy-chain wide-area-network (WAN) and a local-area-network (LAN). The protocol includes a circuit layer which routes messages between WAN stations, and a slot layer which routes slots between LAN channels and WAN devices. The protocol uses virtual circuits to route messages between devices. Broadcast messages distribute control information to all circuits. A circuit-specific control message allows passing control information to each circuit. Virtual circuits are established with a broadcast circuit-connect message and disconnected with a broadcast circuit-disconnect message. The maximum message size is regulated in accordance with the transmission speed of links over which a message must travel.
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Networks and Communications Buyers Guide, (Digital Equipment Corporation, Jul.-Sep. 1988), pp. 2.110-2.114 & pp. 2.157-2.158.
Digital Equipment Corporation, Pty. Limited, Inc.
Olms Douglas W.
Samuel T.
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