Introduction; Router Description And Operation - D-Link 502G - DSL Router - EN User Manual

DSL-502G ADSL Router User's Guide

Introduction

This section provides a brief description of the Router, its associated technologies and a list of Router 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. For ADSL services, it is not necessary expensive new cabling or condition
the line in any way.
ADSL greatly increases the signal carrying capacity of copper telephone lines without interfering with regular
telephone services. For the ADSL user, this means faster downloads and more reliable connectivity. ADSL
devices make it possible to enjoy benefits such as high-speed Internet access 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. A secure point-to-point connection
is established between the user and the central office of the service provider.
D-Link ADSL devices incorporate the recommendations of the ADSL Forum regarding framing, data format,
and upper layer protocols.

Router Description and Operation

The DSL-502G ADSL Router is designed to provide a simple, cost-effective and secure ADSL Internet
connection for your small- to medium-sized private network. The DSL-502G combines the benefits of high-
speed ADSL connection technology and TCP/IP routing with a conventional Ethernet interface in one compact
and convenient package. ADSL connection technology enables many interactive multi-media applications such
as video conferencing and collaborative computing.
The Router is easy to install and use. The DSL-502G connects to an Ethernet LAN via a standard Ethernet
10BASE-T interface using RJ-45 connectors. The ADSL connection is made using ordinary twisted-pair
telephone line with standard RJ-11 connectors. This arrangement means that several PCs can be networked and
connected to the Internet using a single WAN interface and IP address. An additional computer can be connected
to the Router via the USB port.
The Router supports transparent bridging and can be used for IP packet routing over the Internet. Cost saving
features of the Router such as NAT (Network Address Translator) and DHCP (Dynamic Host Configuration
Protocol) improve administration efficiency and improve security. The advanced security enhancements, packet
filtering and port redirection, can help protect your network from potentially devastating intrusions by malicious
agents from outside your network.
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