Network system

Details Network system Network system

1990-10-05

1992-09-01

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, H04J 302, H04J 324

Patent

active

051446227

ABSTRACT:
In a network system having a plurality of LANs each connecting a plurality of terminals interconnected, a LAN interconnection switching unit for switching and relaying data receives data frames from LANs and sends out a call set-up frame including a call number assigned to a combination of source and destination terminal addresses and addresses of relaying interconnection switching units. The data received from LAN is segmented into packets, which are sent out together with the call number. The interconnection switching unit switches and relays data by using data frame error detection scheme in the LAN. Information for controlling a switching sequence is added to the data frame from the LAN to prevent the interruption by the packet having a different call number.

REFERENCES:
patent: 4081612 (1978-03-01), Hafner
patent: 4587651 (1986-05-01), Nelson et al.
patent: 4597078 (1986-06-01), Kempf
patent: 4603416 (1986-07-01), Servel et al.
patent: 4731784 (1988-03-01), Keller et al.

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