Ericsson HM121dp, HM121di manual Introduction, About this Guide, About Adsl

Introduction

1 Introduction

1.1About this Guide

This User Guide provides general information about the installation of the Ericsson ADSL Modem HM121dp/di in a PC/Windows environment, as well as information about day-to-day use of the modem.

You can learn more about unfamiliar or technical terms by consulting the "Glossary" in this guide.

The following chapters are included in this guide:

∙Chapter 1 - "Introduction" provides features of the HM121dp/di as well as a brief description of ADSL and protocol and device driver selection.

∙Chapter 2 - "Installation Procedure" describes the steps for installing and connecting the HM121dp/di in a PC/Windows environment.

∙Chapter 3 - "Accessing the Internet" provides instructions about how to access the Internet when using either the LAN or WAN device driver.

∙Chapter 4 - "Verifying your ADSL Connection" describes how to use the ADSL Modem icon and the Control Panel of the modem to configure and check the performance of the HM121dp/di and the ADSL connection.

∙Chapter 5 - "Customizing Communication Settings" provides steps for altering the ATM Virtual Path ID (VPI), ATM Virtual Circuit ID (VCI), Encapsulation type and/or Modulation type values previously defined.

∙Chapter 6 - "Uninstalling and Updating Modem Software" describes the procedure for uninstalling the modem software and also how to update to a new version of the modem software.

∙Chapter 7 - "Troubleshooting" provides information about how to verify your modem installation and also some tips and solutions for resolving some of the problems that might encounter while installing or using your modem.

∙Chapter 8 - "Important Information" provides information about License Agreement and Regulatory Information.

∙The "Glossary" includes abbreviations and explanations to technical terms used in this guide.

1.2About ADSL

The ADSL (Asymmetric Digital Subscriber Line) technology provides high-speed data access across regular phone lines (copper wires) by making use of previously unused frequency bandwidth above the voice band. By placing the ADSL signal above the frequency of the voice signal, ADSL service is able to coexist on the same line with your telephone service. ADSL is symmetric in the sense that it provides a higher data rate in the downstream (receive) direction than in the upstream (transmit) direction. Asymmetric operation is ideal for typical home and small office use where files and information are downloaded more frequently than uploaded.

The HM121dp/di is capable of supporting the following DSL standards: ANSI T1.413 Issue 2, ITU G.992.1 (G.DMT), ITU G.992.2 (G.lite), and ITU G.992 Annexes A, B and C as applicable.

May 2003