[14730] in North American Network Operators' Group
Re: Microsoft offering xDSL access
daemon@ATHENA.MIT.EDU (Jay R. Ashworth)
Fri Jan 23 10:41:07 1998
Date: Fri, 23 Jan 1998 10:20:31 -0500
From: "Jay R. Ashworth" <jra@scfn.thpl.lib.fl.us>
To: nanog@merit.edu
In-Reply-To: <Pine.BSF.3.91.980123022049.1655E-100000@aries.ai.net>; from Deepak Jain <deepak@jain.com> on Fri, Jan 23, 1998 at 02:23:19AM -0500
On Fri, Jan 23, 1998 at 02:23:19AM -0500, Deepak Jain wrote:
> > UUNET doesn't own dedicated single-circuit copper to people's houses.
>
> If xDSL can only run about 18kft end-to-end, to service a wide metro area
> like Washington, D.C. one would either have to have a POP within every 6
> mile radius (fed by conventional circuits) or backhaul the data (by
> conventional circuit) to their POP.
>
> Is this correct, if not, what am I missing?
That's correct. DSL is a baseband technology, running over copper.
Read: layer 1. The only practical place to put DSL headends right now
is in RBOC CO's. No one else has the point to point copper -- it's not
a multiplexed layer 1 service like cablemodems.
Oh, and sorry, backhauling isn't an issue. The DSL modem at the
opposite end of the line from the customer _has to physically be
there_. Once you grab the signal and turn it into some other layer 1
format, you can mux it and back haul it, but that doesn't solve the
problem at hand.
Cheers,
-- j
--
Jay R. Ashworth jra@baylink.com
Member of the Technical Staff Unsolicited Commercial Emailers Sued
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