Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!caen!uwm.edu!lll-winken!ptavv.llnl.gov!oberman From: oberman@ptavv.llnl.gov Newsgroups: comp.dcom.lans Subject: Re: Ethernet with higher data rates ? Message-ID: <1991May7.074050.1@ptavv.llnl.gov> Date: 7 May 91 14:40:50 GMT References: Sender: usenet@lll-winken.LLNL.GOV Distribution: comp Lines: 30 Nntp-Posting-Host: ptavv.llnl.gov In article , heibe@forst.informatik.rwth-aachen.de (Bernd Heinrichs) writes: > Perhaps this is not a realizable idea. But I think in some environments it > would make sense to use the existing Ethernet installations running with > higher data, e.g. up to 100 Mbit/s, instead of the expensive FDDI. > My problem is, that I do not know, if it is physically possible to run 50- > or 75-ohm coaxial cables at such high data rates. Of course the cable > length must be shortened and the minimum packet length has to exceed > 64 bytes. > > I would be very pleased when som people can tell me, such data rates are > realizable or not. The data rates are certainly realizable. Doing it and not violating FCC emmission specs is another matter. But I have heard from 3 different vendors who plan to announce copper based (coax and TP) token rings which are essentially FDDI on wire. One vendor referred to it as CDDI. Whether such a product will appear is uncertain, but the vendors were all big in the network arena and seemed very serious about it. I wouldn't be too stunned if someone made an announcement in the next few months and showed something at InterOp. R. Kevin Oberman Lawrence Livermore National Laboratory Internet: oberman@icdc.llnl.gov (415) 422-6955 Disclaimer: Don't take this too seriously. I just like to improve my typing and probably don't really know anything useful about anything. Especially anything gnu. P.S. Why did the original message get posted 3 times?