Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!sundc!sun!amdcad!ames!lll-tis!lll-lcc!pyramid!prls!philabs!mam
From: mam@philabs.Philips.Com (Mark A. Maxwell)
Newsgroups: comp.dcom.lans
Subject: Re: Transceiver cable differences
Message-ID: <10702@plnapc.Philips.Com>
Date: Mon, 19-Oct-87 15:30:04 EDT
Article-I.D.: plnapc.10702
Posted: Mon Oct 19 15:30:04 1987
Date-Received: Wed, 21-Oct-87 19:40:00 EDT
References: <1020@hi-csc.UUCP> <167800004@uiucdcsb> <766@gec-mi-at.co.uk>
Reply-To: mam@plnapc.philips.com.UUCP (Mark A. Maxwell)
Organization: Philips Laboratories, Briarcliff Manor, NY
Lines: 34

In article <766@gec-mi-at.co.uk> steve@gec-mi-at.co.uk (Steve Lademann) writes:
>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
> 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	|

 We also have a highly populated backbone with an odd assortment of
 transeivers and MTU's.  The BICC type mentioned above are in use and were
 purchase because the DELNI units had caused some connectivity timeout
 problems.  I have noticed that when attached to a Bridge IB/2 internetwork
 bridge the BICC Fanouts do some times cause packets to bounce around or some
 how generate broadcast packets on other systems.  I say its a toss up..
 It seems that they both have their own short comings depending on a lot
 of variables, so in the end it pays to have both types around an used which
 ever box seems to work in a given application.

 + Mark


-- 
itzzall4phun- Olin Mann   {ihnp4,uunet}!philabs!mam   philips laboratories
     *            *            *                 *                *
 *         Spazzze out in a moon-age day dream ..........Oh Yea!        *
	*                *          *                  *             *