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Conference 7.286::fddi

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

827.0. "Level 4 - 100Mb?" by GRANMA::LHELLINGS () Mon Jan 11 1993 16:53

    Customer is interested in (future) 100Mb over UTP.  Questions wether 
    Level 5 is absolutely a requirement or will Level 4 be ok?  Could 
    someone comment on this and/or point me to a primer on Level 4 and 
    Level 5 cable technology?
    
    Thanks,
    
    LH
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827.1Category 4 is riskyLEVERS::B_CRONINTue Jan 12 1993 10:1113
    Is the customer pushing for category 4 cable? The standard will require
    category 5 cable for the general case (i.e. works without thinking to
    100m meters). Shorter distances may be able to use category 4 cable, but 
    the proof of this (radiated emissions  performance in particular) has yet 
    to be seen. Gioven the current info, it will be difficult to guarantee
    that all category 4 runs will be usable in the future. If they want to 
    wait a few months until the standard becomes firm, they could also do
    that. 
    
    Try Data Communications December issuse (I think). They had a story 
    on cabling. You can also order a copy of EIA/TIA Technical Service
    Bulletin 36 by calling Global Engineering Documents at 1.800.854.7179
    This document has the techniocal details of the different UTP cables. 
827.2KONING::KONINGPaul Koning, A-13683Tue Jan 12 1993 13:435
If you have a choice of which wire to run, the only answer I can see that
makes sense is to go category 5.  That way you maximize your chances at
no significant cost increase.

	paul