D-Link DSL-504 Introduction

DSL-504 ADSL Router User’s Guide

Introduction

This section provides a brief description of the Router, its associated technologies and a list of Router features.

Asymmetric Digital Subscriber Line (ADSL) is an access technology that utilizes ordinary co pper 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 re gular

telephone services. For the ADSL user, this means faster downloads and more reliable connectivity. ADSL

devices make it possible to enjo y benefits such as high-speed Internet access without experiencing any lo ss of

quality or disruption of voice/fax telephone capabilities.

ADSL provides a dedicated service over a single telephone line op erating at speeds of up to 8 Mbps downstream

and up to 640 Kbps upstream, depending on local telephone line conditions. A sec ure 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.

The DSL-504 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-504 combines t he benefits of high-speed ADSL

connection technology a nd TCP/IP ro uting with a conventional Ethernet interface in o ne 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-504 connects to an Ethernet LAN via a standard Ethernet

10BASE-T interface using RJ-45 connectors. The ADSL connectio n is made using ordinary twisted-pair

telephone line with standard RJ-11 connectors. This arrangement means that sever al computers can be

networked and connected to the Internet using a single WAN interface and IP address.

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, pac ket

filtering and port redirection, can help protect your network from potentially devastating intrusions by malicious

agents from outside your network.