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From: arnold@synopsys.com (Arnold de Leon)
Newsgroups: comp.dcom.lans
Subject: Re: 10Base-T hubs
Summary: more arguments for 10Base-T
Keywords: 10Base-T
Message-ID: <721@synopsys.COM>
Date: 13 Apr 91 04:17:14 GMT
References: <1991Apr9.181721.15560@leland.Stanford.EDU> <1593@vtserf.cc.vt.edu> <1991Apr11.044735.1221@ux1.cso.uiuc.edu>
Sender: news@synopsys.com
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In article <1991Apr11.044735.1221@ux1.cso.uiuc.edu> german@uxh.cso.uiuc.edu (Gregory German) writes:
>Money is not the only issue here.  For the most part I would claim
>that it is asking for trouble to daisy-chain between offices and I
>very rarely design a network that includes daisy-chains outside of
>labs/classrooms.  Your users are at the mercy of the guy in the next
>office and everyone on that segement MUST be on the same network.
>If you want to place one person on a separate network you have to
>rewire.
>

	We're in the process of moving into a new building which has 10
different subnets.  UTP really wins for virtually being able to put any any
office on any subnet.  Our last installation was thin wire and it was
exciting everytime someone rearrange their office, gee my bookcase would fit
better if that little piece of cable wasn't there.  It was even worse when
the the network became too busy and and I had to find a way to take flat
network and subnet/bridge it (It was impossible to group workstations to
their servers).

>I don't think anyone is really advocating pulling UTP.  My main reason to
>use it is to avoid having to pull cable into each office right next to
>unused UTP pairs.  If I have to install cable I would use thinnet, BUT
>I would for the most part opt for homeruns for reliability, flexibility
>and manageability.
>

	We did pull UTP for the new installation.  Aren't thin-wire ports
more expensive that UTP ports on hubs?  You seem to imply 1 port per user.


>You have a valid point about colocated hosts being a problem with 10baseT.
>The converters back to coax can work, but are in the $450 range and have
>some limitations.

	I bought a couple of the converters for less than $300.

>
>My point is that there are other considerations than just cost and other
>costs than just installation.  IMHO there is and will continue to be a
>place for both technologies.
>

	Another thing I like about 10 base-T is the ability to
monitor link status.  Given the right hub you can tell if a host
has been unplugged or powered down or up.  You can potentially use this as
a way to monitor access to your network.  It would be more difficult
for a user to add an unauthorized node.

>         Greg German (german@sonne.CSO.UIUC.EDU) (217-333-8293)


-- 
Arnold de Leon  			arnold@synopsys.com
Synopsys Inc.				(415) 962-5051
1098 Alta Ave.
Mt. View, CA 94043