Re: Acceptable DSL Speeds (ms based)
On Thu, May 05, 2005 at 10:59:04AM +0800, Ong Beng Hui wrote:
When I switched from 1600/384 to 3000/768 dsl, download speed went up to very nearly the promised 3Mbps, but latency to the first hop went from 14 ms to 26 ms.
Is there a reason for that ? that, latency goes up when bandwidth goes up for your case ?
I assume it had to do with different settings for interleaving on the DSLAM, as some prior poster mentioned. -- Barney Wolff http://www.databus.com/bwresume.pdf I never met a computer I didn't like.
----- Original Message ----- From: "Barney Wolff" <barney@databus.com>
On Thu, May 05, 2005 at 10:59:04AM +0800, Ong Beng Hui wrote:
When I switched from 1600/384 to 3000/768 dsl, download speed went up
to
very nearly the promised 3Mbps, but latency to the first hop went from 14 ms to 26 ms.
Is there a reason for that ? that, latency goes up when bandwidth goes up for your case ?
I assume it had to do with different settings for interleaving on the DSLAM, as some prior poster mentioned.
-- Barney Wolff http://www.databus.com/bwresume.pdf I never met a computer I didn't like.
Interleaved adds some error correction, allowing the connection to be more resistant to interference (noisy lines), but at the expense of latency. Fast-path is the other way data is sent, which obviously, is much faster, I've personally seen less ~10ms for a loop around 11000ft. -- Andy
participants (2)
-
Andy Johnson -
Barney Wolff