About This User’s Guide, Before You Start

DSL-300 ADSL Ethernet Modem User’s Guide

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.