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DSL-300T 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.
Modem Description and Operation
The DSL-300T ADSL Modem is designed to provide a simple and cost-effective ADSL Internet connection for
a single computer through the Ethernet port; or use it to bridge your Ethernet LAN to the Internet. The DSL-
300T combines the benefits of high-speed ADSL technology and LAN IP management in one compact and
convenient package. ADSL technology enables many interactive multi-media applications such as video
conferencing and collaborative computing.
The Modem is easy to install and use. The DSL-300T connects to single computer or an Ethernet LAN via a
standard Ethernet interface. The ADSL connection is made using ordinary twisted-pair telephone line with
standard connectors. Multiple PCs can be networked and connected to the Internet using a single Wide Area
Network interface and single global IP address.
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.
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.
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.
Operating Systems
The DSL-300T uses 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, including Windows 98
SE, Windows ME, Windows 2000, and Windows XP.