About This User's Guide; Introduction; Modem Description And Operation - D-Link DSL-302G User Manual
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DSL-302G ADSL Modem User's Guide
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Introduction
This section provides a brief description of the Modem, its associated technologies and a list of Modem features.
What is ADSL?
Asymmetric Digital Subscriber Line (ADSL) is broadband access technology that provides high-speed digital
data transmission and interactive multimedia applications for business and residential customers over ordinary
telephone lines.
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 enable high-speed Internet access without any loss of quality or disruption of telephone services.
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. 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.
Modem Description and Operation
The DSL-302G ADSL Modem is designed to provide a simple, cost-effective and secure ADSL Internet
connection for your small to medium-sized private network. The ADSL connection technology enables many
interactive multi-media applications such as video conferencing and collaborative computing.
The Modem is easy to install and use. The DSL-302G connects to an Ethernet LAN via a standard Ethernet
interface, or a single computer via a USB connection. The ADSL connection is made using ordinary twisted-pair
telephone line with standard RJ-11 connectors.
Low Pass Filters
Since ADSL and telephone services share the same copper wiring to carry their respective signals, a filtering
mechanism may be necessary to avoid mutual interference. A low pass filter device can be installed for each
telephone that shares the line with the ADSL line. These filters are easy to install passive devices that connect to
the ADSL device and/or telephone using standard telephone cable. Ask your service provider for more
information about the use of low pass filters with your installation. Appendix D provides illustrated examples of
how to install two common styles of low pass filters.
Web-based Modem Configuration
The DSL-302G can be configured by using an HTML-based web interface for setup and management. The web
configuration manager may be accessed using any operating system capable of running web browser software.
Computer using the USB port to connect to the Modem must install additional software. The additional software
will run on Windows operating systems.
Web Browser
Any common web browser can be used to configure the Modem using the web configuration management
software. The program is designed to work best with more recently released browsers such as Microsoft Internet
Explorer® version 6.0, Netscape Navigator® version 5.2, or later versions. The web browser must have
JavaScript enabled. JavaScript is enabled by default on many browsers. Make sure JavaScript has not been
disabled by other software (such as virus protection or web user security packages) that may be running on your
computer.
Ethernet Port (NIC Adapter)
Any computer that uses the Modem must be able to connect to it through either the USB or Ethernet port on the
Modem. The Ethernet connection therefore requires that your computer be equipped with an Ethernet port as
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