[117961] in North American Network Operators' Group
Re: Does Internet Speed Vary by Season?
daemon@ATHENA.MIT.EDU (joel jaeggli)
Wed Oct 7 11:18:55 2009
Date: Wed, 07 Oct 2009 08:15:19 -0700
From: joel jaeggli <joelja@bogus.com>
To: Scott Howard <scott@doc.net.au>
In-Reply-To: <f1dedf9c0910070752t78dc1268o70bca922badeafe3@mail.gmail.com>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Scott Howard wrote:
<snip>
> So you're saying that if I put in an 8Mbps ADSL1 connection, then I'm going
> to get a guaranteed 8Mbps point-to-point back to the exchange, regardless of
> the quality of my phone line, or the distance from the exchange?
<snip>
>
> (I'm not saying that the article is right, but...)
ADSL systems will retrain to a lower rate as line conditions (SNR)
change for the worse. The attentuation characteristics of a given pair
will change of time due to a number of factor, including but not
certainly limited to physical wear, moisture invasion, localized source
of interference, sunspot activity etc.
Are dsl plants subject to localized environmental conditions? Absolutely.
> Scott
>
