Which copper PMDs?

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1 total messages Started by Marc Gumbold Mon, 28 Dec 1992 15:54

#286

Author: Marc Gumbold
Date: Mon, 28 Dec 1992 15:54

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Hi FDDIers,

it seems I lost orientation in the jungle of the various kinds of
copper PMDs (i.e. FDDI over twisted pair copper cable).

I heard at least of STP (shielded twisted pair), UTP (unshielded TP),
CDDI (Copper Distributed Data Interface), and TPDDI (guess :). 

Things I need to know are: 

o  Which of the above (and possible others) are only different names
   for the same thing? 

o  What are the technical specifications for the various technologies?

o  Are there (real or de-facto) standardization efforts for copper PMDs?
   If so, what is their status?

o  If there is a kind of best-seller or shooting star among the various
   copper FDDIs, who is it, and for what reasons?

If there's anyone out who could help me answering some of my
questions, or provide me with pointers on where to find answers, I'd
be quite glad, as I'm to write an article about FDDI (no problem at
all, besides this copper stuff, which should nevertheless not be left
out). 

I'll be happy to summarize, if there is enough response.

Happy new year ("Must I, Miss Sophie?" :) to y'all,
Marc
-- 
  Marc Gumbold                                       Universitaet-GH Paderborn
  Email: marc@hni.uni-paderborn.de                   Heinz Nixdorf Institut
  Phone: +49 5251 60 3382                            Pohlweg 47-49
  Fax:   +49 5251 60 3426                            W-4790 Paderborn, Germany

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