DSL-514 ADSL Router User’s Guide
Chapter 1 - Introduction
ADSL router 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-514 ADSL Router 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 avoids the need for adding expensive new cable.
ADSL Routers use digital coding techniques that greatly increase the bandwidth capacity of telephone lines without interfering with regular telephone services. For the ADSL Router user, this means much faster data communications. ADSL Routers make it possible to enjoy benefits such as high-speed Internet access, telecommuting, collaborative computing, distance learning, movies on demand and multi-player 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 (to the user) and up to 640 Kbps upstream, depending on the type of service and local telephone line conditions. These conditions are ideal for many user applications. A secure point-topoint connection is established between the user and the central office of the local telephone company. 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 (www.adsl.com) regarding framing, data format, and upper layer protocols.
Router Description and Operation
The DSL-514 ADSL Router is designed to provide a simple, cost-effective and secure ADSL Internet connection for your small to medium-sized corporate LAN. The DSL-514 combines the benefits of high-speed ADSL connection technology and TCP/IP routing with Ethernet capabilities 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-514 offers four dedicated Ethernet LAN ports using standard 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.
The Router can be used for IP packet routing over the WAN and also supports transparent bridging. The Router is ideal for secure telecommuting through the use of virtual private networks (VPN). Cost saving capabilities of the Router include NAT (Network Address Translator) and DHCP (Dynamic Host Configuration Protocol) which allow you connect several hosts to the Internet using a single global IP address.
