Multiplex communications – Wide area network – Packet switching
Patent
1994-07-21
1995-06-27
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04L 1246
Patent
active
054286158
ABSTRACT:
A connection apparatus for connecting a first communication system with a second communication system and a third communication system. A first frame is received from the first communication system, where the first frame has a multicast address as a destination address, and where the destination address requires the first frame to be transmitted onto the second communication system. The multicast address is translated into a functional address, and the functional address is written into a second frame transmitted onto the second communication system. The second frame is received and is transmitted onto a third communication system, and the functional address is translated into a multicast address for the third communication system, and the multicast address is written into a destination field of the frame as it is transmitted onto the third communication system. The second communication system may be a token ring system based upon an IEEE 802.5 standard, and the functional address may be written into a DSAP field and into a PROTOCOL TYPE field of an 802.5 Standard frame.
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Backes Floyd J.
Hawe William R.
Koning G. Paul
Mitton David J.
Perlman Radia J.
Digital Equipment Corp.
Johnston A. Sidney
Jung Min
Olms Douglas W.
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