Node unit and communications method for local area network

Details Node unit and communications method for local area network Node unit and communications method for local area network

1990-10-19

1993-06-08

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 92, 370 8515, H04L 1246

Patent

active

052186032

ABSTRACT:
A communications method for a local area network system including a trunk local area network (1); a plurality of node units (N) provided on the trunk local area network and having a terminal table (TB); a branch local area network (2) connected to each of the node units; and a terminal device (T) connected to the branch local area network, which comprises the steps of comparing a group number of a frame received by the node unit from the trunk area network with a group number of its own to produce a first result and comparing a source address (SA) of the frame with an address stored in the terminal table to produce a second result; and erasing or transferring the frame between the node units based on the first and second results, thereby controlling communications between the terminal devices.

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