Multiplex communications – Wide area network – Packet switching
Patent
1984-05-14
1986-03-11
Orsino, Jr., Joseph A.
Multiplex communications
Wide area network
Packet switching
34082501, 179 18EE, 371 7, H04Q 900
Patent
active
045758425
ABSTRACT:
Enhanced availability and survivability of communications between geographically remote locations with a minimum of redundancy of transmission facilities and media is provided by a survivable bus network capable of providing continued interprocessor or other communications in the event of multiple bus outages. It consists of multiple busses, bus isolation device (BIDs) and two types of network interface processors (NIPs). The BIDs electrically isolate bus segments on either side of a connection so that if a fault occurs only the segment containing the fault will be affected. The first type of NIP connects to one bus and performs the usual function of providing an electrical and software interface between the network and one or more subscriber processors. The second type is a bridge which performs these same functions but connects to two busses and has the capability to transfer traffic as it appears on either bus to the other. The network provides increased survivability in the event of failed segments but does not entail the expense of a fully redundant system.
REFERENCES:
patent: Re28958 (1976-09-01), Zafiropulo et al.
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patent: 3275749 (1966-09-01), Kunihiro et al.
patent: 4075440 (1978-02-01), Laubengayer
patent: 4254496 (1981-03-01), Munter
patent: 4308613 (1981-12-01), Chasek
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Cope Richard P.
Glick Alvin L.
Grund Edward C.
Katz Joseph L.
Greer Timothy K.
Matthews Willard R.
Orsino Jr. Joseph A.
Singer Donald J.
The United States of America as represented by the Secretary of
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