| 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 |
We're trying to use a FDDIcontroller 700 /DSYS5000 in a special enclosure. The problem is there is only 3/4" from end of ST connector to the side of the enclosure. Is there anything like a right angle ST connector/adapter? How about the plastic fiber cable that AMP sells (PN 501232-5). They say you could tie this in a knot (1.7 cm bend radius). They also have right angle strain reliefs. Would this cable work for short runs (<10ft)? Here are some specs: Max attn 650 nm: 0.16 db/m NA: 0.46 What about SIECOR 62.5/125 type OFNR or other plastic cables?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 606.1 | NO PLASTIC!Siecor data here! | POLAR::HOFFE | Mon Jun 15 1992 15:44 | 18 | |
Russ,
Stay away from plastic fibers. FDDI specs are for glass fibers;plastic
fibers have enormous attenuation at 1300 nm,on the order of db/inch!
I dug out my Siecor catalouge:for their "Zipcord" duplex cordage, the
minimum unloaded bend radius is 1.2".Same figure for their "DFX" style
cables.
Bending tighter than this will cause some failry predictable increase
in attenuation and some fairly unpredictable decrease in lifetime of
the cable. The latter is a complicated and imprecise subject;contact me
off line if you want some background on cable bending & reliability.
AMP does make a set of specialty FDDI duplex connectors which have
various(45 deg.) adjustable exit angles. I'm almost sure that these
aren't DEC qualified so ...
Hope this is useful.
Ron
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