D-Link DSL-300I - DSL 300 - 8 Mbps Modem User Manual - About This User’S Guide
DSL-300 ADSL Ethernet Modem User’s Guide
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About This User’s Guide
This user’s guide provides instructions on how to install the DSL-300 ADSL
Modem and use it to connect a PC or Ethernet LAN to the Internet or a remote
LAN. For the sake of simplicity, this document uses the terms Modem (first letter
upper case) to refer specifically to the DSL-300 ADSL Modem, and modem (first
letter lower case) to refer to all such devices including the DSL-300.
This guide assumes that the reader has some familiarity with Ethernet
networks, networking devices, and the TCP/IP suite of protocols.
Before You Start
For the smoothest possible installation process, please read and make sure you
understand all the prerequisites for proper installation of your new Modem. Have
all the necessary information and equipment on hand before you begin.
ADSL Service
In order to use the Router you must first have ADSL service established with an
ADSL service provider, usually your local telephone company, or an Internet
service provider (ISP). Contact your local telephone company for information on
the availability of ADSL service in your area.
Micro-filters
Since ADSL and telephone services share the same copper wire to carry their
respective signals, a filtering mechanism may be necessary to avoid mutual
interference. You will need to install a micro-filter (low pass filter) device for each
telephone that shares the line with the ADSL line. Micro-filters are easy to
install in-line devices, which attach to the telephone cable between the telephone
and wall jack. This device will not affect normal telephone services. Your
telephone company or ADSL service provider will have more information
regarding the use and installation of micro-filters.
VPI and VCI Settings
Your ADSL service provider will provide two numbers, a Virtual Path Identifier
(VPI) and a Virtual Channel Identifier (VCI). You will need to enter these two
numbers during the configuration of the Router.
In order to ensure high quality of service and maximum performance, ADSL
technology employs Asynchronous Transfer Mode (ATM) networks (via the
DSLAM). ATM networks use Permanent Virtual Circuits (PVCs) to establish
end-to-end software defined logical connections. The VPI and VCI are contained
in the ATM cell header. These numbers help manage ATM network connections
and identify logical links formed by PVCs.
For convenient reference, you may want to record the VPI and VCI numbers
here, as well as the MAC (Physical) Address of the Modem.