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.
