Please don't forget moisture content. DSL speeds may drop during wet winters because cable pits fill with water. :)
Those with real statistics, please stand up. I know ISPs who run large DSL infrastructures have these stats. I've even seen them at conferences. :) Adrian On Wed, Oct 07, 2009, Bryan Campbell wrote: > No, I did not read the article . . . But, . . . > > Yes, DSL speed varies by season . . . or rather, temperature. > > But, this is really only the case for _aerial_copper_plant. Buried > plant is nearly the same temperature year round. > > Copper pair resistance changes with temperature. And, therefore, the > link speed of DSL will change depending upon the time of the year > (temperature) and geographic location. > > If there is a difference of but a few degrees of temperature year round, > then no there will be no difference. But, if you live in the desert > southwest or even the mid-west where the temperatures can be 70-120 > degrees different between seasons or even 40-70 degrees different > between night and day . . . you are going to have pronounced differences > in link speed. > > Worst cast, your link speed might vary 10-20%. The longer the cable > length from the central office, the more the variance will be. But, > this is something that must be measured on a case by case basis. And, > since much of the aerial plant has been replaced with buried plant, this > really isn't much of a problem anymore. > > BBC > > Joe Greco wrote: > >>http://www.wired.com/gadgets/miscellaneous/magazine/17-10/ts_burningquestion > > > >It used to be that we would notice this, except that it had everything to > >do with temperature *and* dampness. In the '90's, it was still quite > >common for a lot of older outside plant to be really only "voice grade" > >and it wasn't unusual for copper to run all the way back to the CO, > >through a variety of taps and splice points. Even though Ma Bell would > >typically do a careful job handling their copper, the sheer number of > >potential points of failure meant that it wasn't unusual for water to > >infiltrate and penetrate. If I recall correctly, the worst was usually > >a long, hard cold rain (hey we're in Wisconsin) after which people who > >had been getting solidly high speed modem connects would see a somewhat > >slower speed. > > > >... JG -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $24/pm+GST entry-level VPSes w/ capped bandwidth charges available in WA -
