| 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'm working with a Cable TV company that wants to use FDDI to connect 2
locations together. The locations are 37 kms apart and are currently
linked with single mode fiber.
The FDDI installation would only be used for a year until the customer
has consolidated all of the users into a single data center. To
minimize costs, the customer would like to use FDDI concentrators with
MMF PMDs and using MMF/SMF covertors (the customer already owns these)
connect to the single mode fiber.
What are the potential problems with this approach? Will this work?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1930.1 | NETCAD::MELARAGNI | Tue Jan 23 1996 12:30 | 20 | ||
The problems to look out for include:
- speed (i.e. bandwidth) of the converter
- wavelength of the converter
- power levels in/out of the converters
Our MMF FDDI product sets adhere to ANSI specs and have these salient
charateristics (some of these #s are rough -- you can check them
elsewhere in this notes file):
TX/RX wavelength: 1300nm
TX output power: -14 dBm to -20 dBm
RX min power sensitivity: -31 dBm
Min. exit bandwidth into RX ~ 100 MHz
I'm not sure if the above info will mean much to you, but it may mean
something to the customer. If the above numbers can't be met by the
MMF/SMF converters, then your chances of a stable FDDI link are not
good.
bill
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