Path: utzoo!mnetor!uunet!husc6!linus!philabs!aecom!glen
From: glen@aecom.YU.EDU (Glen M. Marianko)
Newsgroups: comp.dcom.lans
Subject: Info. needed on fiber specs for FDDI use
Message-ID: <1591@aecom.YU.EDU>
Date: 3 Feb 88 21:51:07 GMT
Organization: Albert Einstein College of Medicine, NY
Lines: 27
Keywords: FDDI fiber optics

We are planning a 3000ft. run of fiber optic cable across campus
at present to run ethernet, but also to support the emerging
FDDI standard should we choose to move to FDDI at a later date.
Based upon the info given to me to date I have the following specs:

	Fiber Cable: 62.5/125 Multimode Graded Index
	Capacity:    200-500 MHz per kilometer
	dB Loss:     1.8dB per kilometer maximum
	Connectors:  SMA 905/ST/Amphenol Duplex

My greatest concern is this 200-500 MHz rating.  What does it mean,
exactly?  Is 200 sufficient, or is 500 mandatory?  One vendor said
that 100 would likely be ok, but since we already approach 1km total
length, 200 would be best.

About connectors, as I understand it, there is no standard so
there is a free-for-all.  What's best considering we'll start
with ethernet over fiber and later migrate to FDDI?

Anyone suceessfully using FDDI yet?  How about the Fibronix product?
Is it worth while starting with FDDI right away or just waiting.

HELP! Thanks...

-- Glen Marianko - glen@aecom.yu.edu
   Supervisor of Data Communications
   Albert Einstein College of Medicine