Thread: For enyone on Be* on fast path
View Single Post
Old 13-03-2008, 17:54   #20
dragon
Inactive
 
Join Date: Jan 2004
Posts: 3,898
dragon has reached the bronze age
dragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze agedragon has reached the bronze age
Re: For enyone on Be* on fast path
Quote:
Originally Posted by Chrysalis View Post
which isp are you seeing interleaving by default?

pretty much anyone on adslguide who has a ipstream based service is on fastpath unless the automated systems have changed them to interleaving for stability reasons. But I guess its possible some of the isps may be setting interleaving I think BT retail possibly I read actually. But thats just one isp. In truth interleaving is a way to hide actual problems on a line.

Interleaving alongside the error correction algorithm uses 576kbit of synch speed (on adsl1) but it increases the actual RCO (capacity) of the line as well, in my scenario I gain about 1300kbit RCO on interleaving takeing away the 576kbit I get about 700kbit net gain.
Might have been automated systems seeing as I tend to only look at faulty ADSL's

On adsl2+ it can make a much bigger difference
For instance adsl 2+ Annex M 6db interleaved I sycned at 18Mbit down 2.3Mbit up

Adsl2+ Annex M 6Db Fastpath @ 22.8 Down ~2350 up (I think can't remember exactly what the upstream was)

Adsl2+ Annex M 3Db snrm @

Bandwidth (Up/Down) [kbps/kbps]: 2,589 / 24,514
dragon is offline   Reply With Quote