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From: cmilono@netcom.UUCP (Carlo Milono)
Newsgroups: comp.dcom.lans
Subject: Re: What's going on with twisted pair > 10Mb?
Message-ID: <12125@netcom.UUCP>
Date: 17 Aug 90 22:10:37 GMT
References: <14861@drilex.UUCP>
Distribution: usa
Organization: NetCom- The Bay Area's Public Access Unix System {408 241-9760 guest}
Lines: 24



   Although there are vendors that are tinkering with >10Mb, they are not
what you might call standard.  ARCNET is planning/discussing a 20Mbps
implementation, and there are informal committees meeting on that exact
subject.
   CDDI, or FDDI for Copper is also being explored, and has been demonstrated
by Bell Labs, and others.  There is a problem with 100Mbps as it is being
done today under FDDI - the current modulation scheme will violate FCC
standards when used over STP or UTP.  The basic harmonic is >30Mhz and is
quite strong.  There are other modulation schemes that will pack more data
per cycle, and I believe the IEEE will be meeting on this soon.

  Higher grade copper plant is now being made available - AT&T introduced
2061 4 Pair DIW that will extend 10BASET beyond its current 100 meter limit.
This same wire will also facilitate 16Mb Token Ring.
-- 
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|                   Carlo Milono                                           |
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