[123399] in North American Network Operators' Group
Re: Locations with no good Internet (was ISP in Johannesburg)
daemon@ATHENA.MIT.EDU (Patrick Giagnocavo)
Sat Mar 6 00:30:55 2010
Date: Sat, 06 Mar 2010 00:30:22 -0500
From: Patrick Giagnocavo <patrick@zill.net>
To: NANOG <nanog@nanog.org>
In-Reply-To: <1003040455.AA22820@ivan.Harhan.ORG>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Michael Sokolov wrote:
> Another possible way to solve the middle mile issue would again be to
> use the copper plant that's already in the ground. Unlike fiber, the
> copper plant is *ubiquitous*: I don't know of any place in the 1st or
> 2nd worlds that doesn't have copper pairs going to it. Also AFAIK T1s
> are available everywhere too: if you order a T1, they'll deliver it to
> you regardless of how deep you are in the middle of nowhere, although I
> suppose there likely are extra surcharges involved.
>
Pardon me if attribution is screwed up ...
> Granted, a T1 at 1.5 Mbps may not be much for backhaul, but what about
> bonded T1s? Bond 4 of them to get 6 Mbps symmetric - not too bad in my
> book for a rural community.
>
> And again using SDSL instead of T1 offers a cost reduction opportunity.
> One could get that 6 Mbps symmetric for much cheaper by bonding 4 SDSL
> circuits running at 1.5 Mbps each instead of T1s. There is a Covad
> DSLAM with SDSL capability in virtually every CO in the country, but
Isn't this really an issue (political) with tariffed T1 prices rather
than a technical problem?
I was told that most T1s are provisioned over a DSLAM these days
anyways, and that the key difference between T1 and DSL was the SLA
(99.99% guarantee vs. "when we get it fixed").
And T3/DS3 can run over what, 4 copper pairs? Yet how much is the
typical tariffed rate for that?
--Patrick
