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Dual 56K LAN Modem
User Guide
MODEL NO.
3C888
Part No. 1.018.1752
Published May 2000
http://www.3com.com/
http://www.3com.com/
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3Com Corporation Copyright © 3Com Corporation, 2000. All rights reserved. No part of this documentation may be 5400 Bayfront Plaza reproduced in any form or by any means or used to make any derivative work (such as translation, Santa Clara, California transformation, or adaptation) without permission from 3Com Corporation. 95052-8145 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of
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IMPORTANT SAFETY INFORMATION Important Safety WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. Information Please read the following information carefully and thoroughly before installing the unit: Take exceptional care during the installation and removal of the unit. Locate the unit close to the mains socket outlet, and ensure that the mains socket is accessible. Use the p
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ist, daß die Spannung zwischen zwei zugänglichen Bauteilen einen Sicherheitswert nicht übersteigt (42,2 V Spitzenspannung bzw. 60 V Gleichspannung). Die Einheit enthält keine Sicherungen oder sonstige Bauteile, die vom Benutzer ausgewechselt oder gewartet werden können. Sollte ein physikalischer Fehler auftreten, der mit den in diesem Handbuch beschriebenen Maßnahmen nicht zu beheben ist, setzen Sie sich mit dem 3Com-Vertreter in Verbindung, bei
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Puertos con etiqueta LAN o Phone= SELV. SELV (Safety Extra Low Voltage) es un circuito secundario diseñado para que el voltaje entre dos puntos accesibles no exceda límites seguros (42,2 V punta ó 60 V CC) en circunstancias normales o de fallo simple. La unidad no contiene fusibles ni otros componentes que el usuario pueda cambiar o reparar. De producirse problemas cuya resolución no se explique en esta guía, póngase en contacto con el provee
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If the unit shows signs of a distinct change in performance. Never install telephone wires during a lightning storm, or install telephone connection sockets in wet locations, unless the socket is specifically designed for wet locations. Do not touch uninstalled telephone wires or terminals unless the telephone line has been disconnected at the network interface. Always exercise caution when installing or modifying telephone lines. Do not use a telephone, wh
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TABLE OF CONTENTS IMPORTANT SAFETY INFORMATION 3 Wichtige Sicherheits-Informationen 3 Important Notice de Securite 4 Medidas de Seguridad Importantes 4 Informazioni Importanti per la Sicurezza 5 Additional Safety Information 5 ABOUT THIS GUIDE Introduction 11 How to Use This Guide 11 Conventions 12 Year 2000 Compliance 12 INTRODUCTION Introduction 13 Applications 14 Hardware Description 16 Features 1
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Setting Up Your Computer If You Have a Static IP Address 39 INSTALLING THE DUAL 56K LAN MODEM Before You Start the Installation 43 CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS Typical Configuration 47 Changing the LAN Modem IP Address for Static IP Users 52 The LAN Modem Main Configuration Page 53 Connecting an External Hub to the Dual 56K LAN Modem 56 CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS Before You Start the Configuration 59 Configur
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Placing a Call from a Client-side LAN Modem 118 PLACING, RECEIVING AND DISCONNECTING CALLS Using the LAN Modem Desktop Manager (Windows only) 119 Placing Calls 119 Receiving Calls 121 Disconnecting Calls 122 TROUBLESHOOTING AND MAINTENANCE Checking the Basics 125 Monitoring LEDs 125 Evaluating Symptoms and Solutions 126 Finding More Information 131 Contacting Technical Support 131 Downloading Firmware to Your Dual 56K LAN Modem 131 Resetting the Dual 5
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GLOSSARY 3COM CORPORATION LIMITED LIFETIME WARRANTY REGULATORY AND APROVAL INFORMATION
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ABOUT THIS GUIDE About This Guide provides an overview of this User Guide, describes guide conventions, and shows you where to look for specific information. Introduction This guide tells you how to install and configure the Dual 56K LAN Modem and provides descriptions of key applications and networking concepts. Audience Description This guide is intended for end users with no presumed level of expertise. How to Use Table 1 shows you where to find specific information in this guide. This Guide Ta
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12 ABOUT THIS GUIDE Conventions Table 2 and Table 3 list conventions that are used throughout this guide. Table 2 Notice Icons Icon Notice Type Alerts you to... Information note Important features or instructions Caution Risk of personal safety, system damage, or loss of data Warning Risk of severe personal injury Table 3 Text Conventions Convention Description Commands The word “command” means you must enter the command exactly as shown in text and press the Return or Enter key. Example:
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INTRODUCTION 1 ® This chapter provides an overview of the OfficeConnect Dual 56K LAN Modem, referred to throughout this document as the Dual 56K LAN Modem, or simply as the LAN Modem. Introduction The Dual 56K LAN Modem is an easy-to-install, Local Area Network (LAN) to Wide Area Network (WAN), analog IP router. The LAN Modem provides four 10BASE-T Ethernet ports for LAN-side connections and two internal, V.90 ITU 56K-standard modems for WAN-side connections, plus two additional analog ports
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Message AA CD RD SD OH AA CD RD SD OH TX COLL 1 2 3 4 Alert Power Message AA CD RD SD OH AA CD RD SD OH TX COLL 1 2 3 4 Alert Power 14 CHAPTER 1: INTRODUCTION Applications The primary applications for the Dual 56K LAN Modem are: Local networking with shared, dial-out access to the Internet Local networking with shared, dial-out access to a private network, such as a remote corporate office LAN (this can include indirect Internet access through the private network’s Internet connection) Lo
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Message AA CD RD SD OH AA CD RD SD OH TX COLL 1 2 3 4 Ale rt P owe r Message AA CD RD SD OH AA CD RD SD OH TX COLL 1 2 3 4 Alert Power Applications 15 Local Networking with Users can share simultaneous access to both the Internet and a remote private Shared Access to the network while they continue to network locally, as shown in Figure 3. Internet and a Private Network Internet OfficeConnect Dual 56K LAN Modem Public telephone MODEM 1 MODEM 2 LAN Status network OfficeConnect Dual 56k LAN Mo
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Message AA CD RD SD OH TX COLL 1 2 3 4 AA CD RD SD OH Power Alert 16 CHAPTER 1: INTRODUCTION Hardware Description The following is an overview of the Dual 56K LAN Modem hardware, including the function of the front panel LEDs and back panel connectors. Front Panel LED The front panel contains the LEDs illustrated in Figure 5. Description MODEM 1 MODEM 2 LAN Status OfficeConnect Dual 56k LAN Modem Figure 5 Dual 56K LAN Modem Front Panel The functions of the front panel LEDs are described in Ta
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Hardware Description 17 Table 4 Front Panel LED Indicator Definitions (continued) LED Color Description COLL Amber Ethernet Collision Status. Flashes amber when some collisions are taking place on the Ethernet LAN. Off indicates that no collisions are taking place on the Ethernet LAN. Ports 1-4 Green Ethernet LAN Port Status. On indicates that the unit detects the Ethernet link integrity signal from an attached computer and operation is normal. Flashes when the LAN Modem receives data on
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18 CHAPTER 1: INTRODUCTION Features Ease of Installation and Use Web-based, point-and-click user interface for easy configuration Automatic Internet configuration verification via your Internet Service Provider (ISP) Web-based, context-sensitive online help Dial-in Wizard for easy configuration of dial-in setup LAN Modem Desktop Manager tool for easy management and stats ® ® ® ® monitoring (Windows 95 , 98 , NT and 2000 ) EZ- LAN Wizard, which optimizes workstation settings for use wit
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Features 19 Network Address Translation (NAT) between LAN and WAN, which allows multiple users on the LAN to share a single remote connection and user account. Intelligent NAT, an enhancement to NAT which enables UDP applications to work with the Dual 56K LAN Modem. Multiplexing traffic from several computers to remote destinations Bandwidth Management Automatic call initiation (also known as dial-on-demand routing) Automatic disconnection of idle calls after a specified length of tim
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20 CHAPTER 1: INTRODUCTION Modulation Schemes V.90 (backwards-compatible with all US Robotics 56K Standards) ITU-T V.34+ ITU-T V.34 ITU-T V.32bis ITU-T V.32 ITU-T V.22bis ITU-T V.22 ITU-T V.23 Bell 212A ITU-T V.21 Bell 103 Security PAP, CHAP and MS-CHAP support Callback support for dial-in and dial-out calls Upgradeability Flash memory for field firmware updates Firmware posted on 3Com’s Web site Fully upgradeable to future 56K standards Diagnostics LED status dis
