D-Link DSL-500 User Manual - Introduction
DSL-500 ADSL Router User’s Guide
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Introduction
This chapter describes the DSL-500 ADSL Router and its features and gives a
brief introduction to ADSL technology.
Router Description and Operation
The DSL-500 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-500 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
multimedia applications such as video conferencing and collaborative computing.
The Router is easy to install and use. The DSL-500 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. This also allows the creation of a virtual private
network for telecommuter access to the LAN and company servers.
The Router can be used for IP packet routing over the WAN and also supports
transparent bridging. Other cost saving capabilities of the Router include NAT
(Network Address Translator) and DHCP (Dynamic Host Configuration Protocol).
ADSL Technology
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 copper telephone lines forgoes the need
for
upgrading or adding expensive new cable.
ADSL devices use digital coding techniques that greatly increase the potential
capacity of phone lines without interfering with regular telephone services. For
the ADSL user, this means much faster data communications and the potential
for interactive video 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 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 (to
the ISP), depending on local telephone line conditions. These conditions are ideal