Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!mips!sjsca4!poffen
From: poffen@sj.ate.slb.com (Russ Poffenberger)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Ethernet Cards and long lines
Message-ID: <1990Nov26.213923.5027@sj.ate.slb.com>
Date: 26 Nov 90 21:39:23 GMT
References: <17132@hydra.gatech.EDU> <17358@netcom.UUCP>
Reply-To: poffen@sj.ate.slb.com (Russ Poffenberger)
Organization: Schlumberger Technologies, San Jose, CA.
Lines: 23

In article <17358@netcom.UUCP> jbreeden@netcom.UUCP (John Breeden) writes:
>In article <17132@hydra.gatech.EDU> bb16@prism.gatech.EDU (Scott Bostater) writes:
>>I'm looking for a manufacturer of ethernet cards that can RELIABLY handle
>>long drop lines.  We have several Western Digital WD8003E cards, some of
>>which can handle line lengths of 125 feet or so and others that can only
>>handle 65 feet or so.  I've talked to tech support at WD and they admit 
>>that they have a problem with longer distances and are "looking into the
>>problem"  Meanwhile, I'm looking for alternate sources of ethernet cards.
>>
>
>If you mean by "drop-line", running 65-125' of thinnet from a tee connector
>from another thinnet - you're in violation of the 802.3 10base2 spec.
>
>You can't run thinnet "drops" off of a thick/thinnet and expect reliability
>(or even your net to work).

I imagine he is referring to a thick transceiver cable drop. These are limited
to 50m (> 150') in the spec.

Russ Poffenberger               DOMAIN: poffen@sj.ate.slb.com
Schlumberger Technologies       UUCP:   {uunet,decwrl,amdahl}!sjsca4!poffen
1601 Technology Drive		CIS:	72401,276
San Jose, Ca. 95110             (408)437-5254