D-Link DSL-300I - DSL 300 - 8 Mbps Modem User Manual - Introduction

DSL-300 ADSL Ethernet Modem User’s Guide

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Introduction

ADSL technology is a relatively new technology and may be unfamiliar to the

reader. In this section, we introduce you to ADSL technology and give a brief

description of its key attributes. We also give a general description of the D-Link

DSL-300 Modem and its main features.

What is ADSL?

Asymmetric Digital Subscriber Line (ADSL) is an access technology that utilizes

ordinary copper telephone lines to enable broadband high-speed digital data

transmission and interactive multimedia applications for business and

residential customers. Using existing phone lines means there is no need to add

expensive new fiber-optic cable or line conditioning.

ADSL modems greatly increase the signal carrying capacity of copper telephone

lines without interfering with regular telephone services. For the ADSL user,

this means much faster data communications and interactive multimedia

capabilities. ADSL devices make it possible to enjoy benefits such as high-speed

Internet access, telecommuting (remote LAN access), collaborative computing,

distance learning, movies on demand and multiplayer video gaming without

experiencing any loss of quality or disruption of voice/fax telephone capabilities.

ADSL provides a dedicated service over a single telephone line operating at

speeds of up to 8 Mbps downstream and up to 640 Kbps upstream, depending on

local telephone line conditions. These conditions are ideal for many user

applications. A secure point-to-point connection is established between the user

and the central office of the local telephone service provider. The user is always

connected thus eliminating dial-up time and simplifying connectivity issues.

D-Link ADSL devices incorporate the recommendations of the ADSL Forum

regarding framing, data format, and upper layer protocols.