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From: cmilono@netcom.COM (Carlo Milono)
Newsgroups: comp.dcom.lans
Subject: Re: 10Base-T hubs
Message-ID: <1991Apr12.013427.24895@netcom.COM>
Date: 12 Apr 91 01:34:27 GMT
References: <1991Apr08.171237.19978@shl.com> <1582@vtserf.cc.vt.edu> <1991Apr9.221136.12326@jhereg.osa.com>
Distribution: usa
Organization: Netcom - Somewhere in the S.F. Bay Area
Lines: 33

In article <1991Apr9.221136.12326@jhereg.osa.com> andrew@jhereg.osa.com (Andrew C. Esh) writes:
>In article <1582@vtserf.cc.vt.edu> jcrowder@GroupW.cns.vt.edu (Jeff Crowder) writes:
>>In article <1991Apr08.171237.19978@shl.com> phil@shl.com (Phil Trubey) writes:
>>
>>>As fas as the hype being invented, every new installation that I've dealt
>>>with (I work for a systems integrator) in the last year has been 10BaseT.
>>>The *only* place where I would recommend coax is in a lab environment
>
>Only a lab environment? You must realize that some sites are more spread
>out than what 10baseT can reach. Sure, it will work for one floor of a
>small to medium sized building, but sheer physics drives you up into
>ThinNet, ThickNet, and Fiber when the physical seperation between nodes is
>great. 10baseT just doesn't go more than 400 ft. The company I work for is
>called upon to design nets for buildings up to a quarter MILE on a side.
>10baseT is great for an office area, but you need something else for
>distance.
>> 
You can daisy-chain MPR's at least up to four; at 300' each, you can
safely install a 10BASE-T network whose far-to-near end components
approach 1500' - you need to factor the Round-Trip-Bit-Delay using
the constructs of the MPR and the cable length.  Using higher quality
wire (i.e., AT&T's 2061 cable), you can run even farther!\

To go one step farther, there *really* isn't a four-repeater RULE in
10BASE-T, and I have seen more than six MPR's strung out.  However,
for Distance (with a Capital-D), nothing beats FOIRL for that, unless
you have the bucks for FDDI.
-- 
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|  Carlo Milono:  cmilono@netcom.apple.com   or   apple!netcom!cmilono     |
|"When a true genius appears in the world, you may know him by this sign,  |
|that the dunces are all in confederacy against him."   - Jonathan Swift   |
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