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Date:      Thu, 12 Jun 1997 14:02:43 +0000 (GMT)
From:      spork <spork@super-g.com>
To:        "Josef C. Grosch Contra" <jgrosch@xsvr1.cup.hp.com>
Cc:        freebsd-chat@freebsd.org
Subject:   Re: Cable modems
Message-ID:  <Pine.BSF.3.95q.970612135726.14793A-100000@super-g.inch.com>
In-Reply-To: <9706111134.ZM2345@xsvr1.cup.hp.com>

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On Wed, 11 Jun 1997, Josef C. Grosch Contra wrote:

> Question: Would ADSL work on Northern Telcom DMS-100 ?

>From what I understand, and the way we were planning to test it, is that
the major advantage(?) is that it doesn't ever touch a switch.  The only
reason it works is because you are buying dry copper from point to point
and putting a special box on each end.  An ISP has a choice at that point
of either a) co-locating at the CO and putting a multi-port xDSL unit
there and hauling the bandwidth back to their nearest POP that can handle
it, or b) within the distance limitations, buy two point-to-point copper
lines, one to the customer, one to your POP.  In the latter case, you are
using the CO as a "patch panel" and just twisting the two lines together
so you can aggregate the bandwidth with cheap copper vs. expensive T3s...

None of the explanations I've heard yet mention anything about the CO
switch, as all the xDSL (except for IDSL, which I don't yet comprehend)
methodoligies don't touch a switch.  You're only in the CO to pick up the
wire.

Charles




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