| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
I noticed a few unanswered queries on SMF so I thought I'd ask afresh ! Can someone please tell me the plans for the new DECbridge 900MX and its support for single mode fibre ? I have received/read mixed messages and now am somewhat confused ! While on the subject, a customer I'm talking to has had a single mode fibre installed on his site (it's a long story and I won't bore you all with the details). Suffice to say that now he's struggling to make use of the cable for just Ethernet purposes so we're talking about moving towards FDDI sooner than he'd anticipated so that anything spent on the network is not just a short-term spend ! I know about the SMF support in the 500 Concentrator and 500/600 series bridges, but want to avoid them if possible due to their "maturity" and cost. ie. newer kit is much better value etc. A DECbridge 900MX supporting SMF would be ideal for this scenario, but do we do one ? If so, when ? This customer has raised the issue of using SMF-Multimode converters and then being able to use his ethernet kit as originally intended. I have heard that Digital do not recommend the use of such devices. Is this true ? If so, can someone please explain why ? Could this provide a solution to cheaper FDDI connectivity ? Does not recommended translate to not supported ? etc. thanks in advance Rog
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1254.1 | STRWRS::KOCH_P | It never hurts to ask... | Tue Mar 01 1994 12:04 | 4 | |
I don't think the DECbridge 900MX has modular PMDs which are
CHANGEABLE. I'd recommend the DECconcentrator 900 with SM PMDs and
connect these via the DEChub 900 FDDI channel when HUBwatch V3.0 is
available.
| |||||
| 1254.2 | KONING::KONING | Paul Koning, B-16504 | Tue Mar 01 1994 14:44 | 5 | |
DECbridge 900 MX comes with ANSI (multimode) MIC connectors, fixed to the module. It does NOT have modular PMDs... unfortunately, there is no room on the module for that. (Things only barely fit as it is!) paul | |||||
| 1254.3 | Always look on the bright side... | 42721::HARVEY | Baldly going into the unknown... | Tue Mar 01 1994 16:16 | 8 |
Ho hum - that cleared that one up ! Never mind a new 900 Con + 900 Bridge is still likely to be cheaper than the older 600 series DAS bridge... ;^) Thanks for the updates Rog | |||||
| 1254.4 | KONING::KONING | Paul Koning, B-16504 | Tue Mar 01 1994 17:01 | 8 | |
Oops... forgot something... Check with the product manager (Jane Brechlin) about the "big" docking station. I believe there's a docking station being done that includes an FDDI port, with a MOD-PMD. If that's correct, then you could indeed get single mode that way (i.e., for standalone use, though not in a hub). paul | |||||