| 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 |
Hola,
Is there any place, site...where I can get info about FDDI type
of cables recommended, already tested or approved. I'm interested
in cable supplier and mechanical characteristics of the cable rather
than optical char, bandwith etc...
Actually we have a supplier, called Cables de Lyon, the price of
the cable is almost double than others. All of them claim that their
own is FDDI compliant, but what are the real char of an FDDI compliance
of a fiber optic cable regarding mechanical, electrical and optical
char.
Saludos,
Juanjo Candalija
EIS-SWAS madrid
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 18.1 | There aren't any approved cable suppliers | BAGELS::LEVY | Tue Nov 14 1989 12:22 | 11 | |
Mechanical specifications depend on the cable application (aerial,
direct buried, riser, etc.). I suggest you view the first DVN telecast,
Fiber Optics Technology. Contact QUIPS::HERBERT for details on the
videotape, companion workbook, and notesfile.
There aren't any approved cable suppliers. Cables which meet the
purchase spec (a copy of which is in the QUIPS::FOFT notesfile)
are, by definition, "approved."
Jon Levy
| |||||
| 18.2 | 62.5/125; AT&T, Siecor | DACT19::PDORNAN | Patrick Dornan, NWSS 8-339-7169 | Tue Nov 28 1989 16:05 | 6 |
62.5/125 micron cable is recommended. Siecor and AT&T supply fiber
cable for my customers' fiber optic Ethernet configurations. We
install these as a 1st step towards FDDI, in case they ever need
it.
Patrick
| |||||
| 18.3 | 50/125 for FDDI OK? | VAXRIO::ROLF | Thu Dec 14 1989 08:43 | 12 | |
I am currently selling about 10 Km (in various pieces, none longer
than 1 KM) of 50/125 fiber telling the customer that this fiber
will work with FDDI if he wants to do so in the future.
Reason is, here in Brazil that's the only fiber produced locally.
All the other characteristics (dual window etc) are same as for
the 62.5/125 fiber.
Am I telling the customer a lie? I am sure I have seen references
to 50/125 fiber being used (or tested) in conjunction with FDDI.
Rolf, Rio de Janeiro, Brazil
| |||||
| 18.4 | KONING::KONING | NI1D @FN42eq | Thu Dec 14 1989 11:11 | 8 | |
It depends. 62.5 is the recommended type. 50 can also be used, but the loss budget calculation comes out different since you have losses at the optical transmitter. (The optical transmitter is designed to couple into 62.5 size fiber; if you give it the smaller fiber you lose some of the light.) The cable loss may also be different. With 1 km runs you're probably ok but to be safe you should run it though the calculations. paul | |||||