[TMG] Re: DSL, ADSL

[Thanit Hasadsri]

http://en.wikipedia.org/wiki/Digital_Subscriber_Line
ADSL(Asymmetric Digital Subscriber Line) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. It does this by utilizing high frequencies that are not used by a voice telephone call that uses low frequency on the same telephone line.

DSL services ranges from 256 kilobits per second (kbit/s) to 24,000 kbit/s
Typically, upload speed is lower than download speed for Asymmetric Digital Subscriber Line (ADSL) and equal to download speed for the rarer Symmetric Digital Subscriber Line (SDSL).

SDSL unlike ADSL, it can't co-exist with a conventional voice service on the same pair as it takes over the entire bandwidth. 

--- On Wed, 10/1/08, S. Pui-ock <hs5drl at rocketmail.com> wrote:

> From: S. Pui-ock <hs5drl at rocketmail.com>
> Subject: Re: [TMG] Re:Internet Problem
> To: aathanit at yahoo.com
> Date: Wednesday, October 1, 2008, 8:22 PM
> ผมสงสัยครับอะไรคือ ADSL
> และ DSL
> เหมือนหรือต่างกันครับ
> หนึ่ง