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From: steve@gec-mi-at.co.uk (Steve Lademann)
Newsgroups: comp.dcom.lans
Subject: Re: Transceiver cable differences
Message-ID: <766@gec-mi-at.co.uk>
Date: Mon, 12-Oct-87 11:08:36 EDT
Article-I.D.: gec-mi-a.766
Posted: Mon Oct 12 11:08:36 1987
Date-Received: Thu, 15-Oct-87 20:16:53 EDT
References: <1020@hi-csc.UUCP> <167800004@uiucdcsb>
Sender: news@gec-mi-at.co.uk
Reply-To: steve@gec-mi-at.co.uk (Steve Lademann)
Organization: Marconi Instruments Ltd., St. Albans, UK
Lines: 18

We have recently experienced some problems with a BICC/ISOLAN fan-out
unit (DELNI equivalent). We had a 15 metre, unterminated transceiver cable
attached to said fan-out unit which went close to some high frequency
electrical noise (well, an LSI-11/73 computer system actually - the
DEQNA which the cable was originally attached to was having the anti-hang
ECO applied to it, but that's another story). At odd times, the fan-out
unit sprayed random garbage onto the Ethernet, causing Havoc. The Ethernet
on this site is fairly extensive, so finding the problem was not easy.
ISOLAN/BICC told us that the problem was due to the cable being Series 2
not 802.3. However, substituting a DELNI for the ISOLAN box cured the problem.

Now, the net effect is that I've got the distinct impression that I've had
the wool pulled over my eyes. Any netlander care to comment?

|Steve Lademann		|Phone: 44 727 59292 x326		|
|Marconi Instruments Ltd|UUCP : ...mcvax!ukc!hrc63!miduet!steve	|
|St. Albans    AL4 0JN	|NRS  : steve@uk.co.gec-mi-at		|
|Herts.   UK		|	"disclaimers.all"