paul@hpsciz.sc.hp.com (Paul Mooney) (10/10/90)
While looking into some ISDN "stuff" I ran into the following acronyms
for which I would like "translations." Any help would be appreciated.
1. SMDS
a. DQDB
b. MSS
c. IMSSI
(Obviously the documentation was not complete. However, a xxxx router can
have up to 6 SMDS links. A DQDB is another box at a remote site which can
be daisy chained or stand-alone).
Thanks,
Paul Mooney Network Services Hewlett Packardgoldstein@delni.enet.dec.com (Fred R. Goldstein) (10/13/90)
In article <13266@accuvax.nwu.edu>, paul@hpsciz.sc.hp.com (Paul Mooney) writes: >While looking into some ISDN "stuff" I ran into the following acronyms >for which I would like "translations." Any help would be appreciated. >1. SMDS Switched Multi-Megabit Data Service. A Bellcore invention, not really part of ISDN. It's a public network _connectionless_ service, using the 802.6 (DQDB) MAC protocol but with E.164 (ISDN) addresses. Initially definied data rates are 44 Mbps (T3) and 1.5 Mbps (T1), but then there's a lot of overhead so your mileage may vary. > a. DQDB Distributed Queue Dual Bus. The name of the IEEE 802.6 protocol, based on the development of QPSX Inc. of Perth, Western Australia but with a lot of changes in committee. It's a Metropolitan Area Network MAC protocol, media-independent but aimed at the 30-150 Mbps range. It offers packet and circuit (isochronous) bandwidth. > b. MSS MAN Switching System. The name of an SMDS network node, a connectionless packet switch using the 802.6 protocol for access lines. > c. IMSSI Inter-MSS-Interface. The circuits between MSSs, enabling a multi-switch SMDS network to be built. It's all defined in some Bellcore TAs, like TA-TSY-000772. Fred R. Goldstein Digital Equipment Corp., Littleton MA goldstein@delni.enet.dec.com voice: +1 508 486 7388 Do you think anyone else on the planet would share my opinions, let alone a multi-billion dollar corporation?