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Re: [nanog] Re: Microsoft offering xDSL access
From: Stephen Balbach <stephen () clark net>
Date: Fri, 23 Jan 1998 10:59:31 -0500 (EST)

On Fri, 23 Jan 1998, Deepak Jain wrote:

UUNET doesn't own dedicated single-circuit copper to people's houses.


Okay, now lets talk about a wide-scale xDSL implementation using a 
reasonably well known POP architecture like UUNet's. 

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?

We are part of the Bell Atlantic ADSL trial in Northern VA - basically BA
has 6 CO's with terminating ADSL modems. This is aggregated onto a FDDI
ring between each CO on cisco's. One of the CO's has a port into the BA
SMDS cloud which is the interconnect with participating ISP's who also
have a port on the SMDS cloud. So basically, packetize the data as early
as possible to get the 20x plus economies of scale vs hauling channelized
circuits.

        Stb

VP Technology
ClarkNet 
Verio www.verio.net/vsite/eastern.html




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