Dual 56K LAN Modem User Guide MODEL NO. 3C888 Part No. 1.018.1752 Published May 2000 http://www.3com.com/ http://www.3com.
3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 3Com Corporation, 2000. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation.
IMPORTANT SAFETY INFORMATION Important Safety Information WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. 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.
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 dem Sie das Gerät erworben haben.
■ 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 proveedor de 3Com.
■ 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.
TABLE OF CONTENTS IMPORTANT SAFETY INFORMATION Wichtige Sicherheits-Informationen 3 Important Notice de Securite 4 Medidas de Seguridad Importantes 4 Informazioni Importanti per la Sicurezza Additional Safety Information 5 3 5 ABOUT THIS GUIDE Introduction 11 How to Use This Guide Conventions 12 Year 2000 Compliance 11 12 INTRODUCTION Introduction 13 Applications 14 Hardware Description Features 18 16 DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION LAN Side Connectivity: Installing an Ethernet Hub 21 W
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 Configuration Steps 60 Changing the LAN Mo
Placing a Call from a Client-side LAN Modem 118 PLACING, RECEIVING AND DISCONNECTING CALLS Using the LAN Modem Desktop Manager (Windows only) Placing Calls 119 Receiving Calls 121 Disconnecting Calls 122 119 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 Resetting the Dual 56K LAN Modem 131 Reviewing Statistics 132 Synchronizing
GLOSSARY 3COM CORPORATION LIMITED LIFETIME WARRANTY REGULATORY AND APROVAL INFORMATION
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 Audience Description How to Use This Guide This guide tells you how to install and configure the Dual 56K LAN Modem and provides descriptions of key applications and networking concepts. This guide is intended for end users with no presumed level of expertise. Table 1 shows you where to find specific information in this guide.
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.
1 INTRODUCTION 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.
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) ■ Local networking with shared, simultaneous dial-out access to the Internet and a private network ■ Combined dial-in and dial-out access f
Applications Local Networking with Shared Access to the Internet and a Private Network 15 Users can share simultaneous access to both the Internet and a remote private network while they continue to network locally, as shown in Figure 3.
CHAPTER 1: INTRODUCTION Hardware Description Front Panel LED 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. The front panel contains the LEDs illustrated in Figure 5.
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.
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 with t
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.
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.
2 DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION This chapter explains the Dual 56K LAN Modem’s key functionality for users who wish to gain a fuller understanding of the LAN Modem before attempting to install and configure the unit.
CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION Wan Side: The Two 56K Modems On the Wide Area Network (WAN) side of the Dual 56K LAN Modem, up to 25 users can share access to the WAN through use of the LAN Modem’s two internal 56K modems.
Using the Modem Channels 23 If one or more Service Providers are configured as a Multilink-enabled connection, one high-speed call at a time is possible whenever one of these calls is in session, as shown in Figure 9.
CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION Dial-out Call Routing When the LAN Modem makes an outgoing call, it follows a specific order for routing data packets, based on the destination Network ID (that is, the IP address and subnet mask) associated with the packet.
Dial-in Functionality Dial-in Functionality 25 When you set up the LAN Modem for dial-in support, you can configure up to ten designated Dial-in Users to dial in to the local LAN. In addition, you must configure Dial-in Global Parameters which apply to all dial-in calls. When you configure Dial-in Global Parameters, you choose whether to allow one or both channels to be used for dial-in calls.
CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION Simultaneous Dial-in Calls from Two Different Locations If you configure the LAN Modem to make both channels available for dial-in calls, each as a single channel connection, you can have simultaneous dial-in calls from two different locations, as shown in Figure 12.
Understanding Multilink PPP and Other Line Usage Options Callback Capability with Dial-in Calls 27 When you configure the LAN Modem for dial-in support, you can choose to enable Callback in each Dial-User profile that you create. When Callback is enabled, the LAN Modem is designed to identify the authorized Dial-in User, drop the incoming call, and immediately place a return call to that user.
CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION When this option is configured, both modem channels are used every time a connection is made to a remote destination, regardless of the amount of traffic being generated. The DBA feature is not utilized, because both channels are used for every call. Make sure that your remote destination supports this functionality.
Support for Virtual Private Networks (VPNs) Through its support of the Point-to-Point Tunnel Protocol (PPTP), the Dual 56K LAN Modem allows users on any workstation attached to the LAN Modem to communicate with a remote private network over the Internet using a Virtual Private Network (VPN) tunnel, provided the necessary client software is installed on the user’s workstation.
CHAPTER 2: DUAL 56K LAN MODEM FUNCTIONALITY DESCRIPTION
3 BEFORE YOU BEGIN This chapter explains how to set up your Dual 56K LAN Modem, and guides you through the basic pre-installation checks that you should perform on all workstations that you will attach to the LAN Modem. This includes checking each workstations’ TCP/IP and IP address settings to determine whether it is set up for dynamic or static IP networking. Instructions for setting up TCP/IP on your workstation are provided for users who must perform this step.
CHAPTER 3: BEFORE YOU BEGIN ■ A Web Browser, such as Netscape Navigator (4.0 or later) or Microsoft Internet Explorer (4.0 or later). Your computer is used to configure the LAN Modem, in addition to being one of its networked devices. You use the web browser installed on your computer to access the LAN Modem’s internal configuration screens. Why Check TCP/IP and IP Address Settings? The Dual 56K LAN Modem is an IP router designed for optimal use with networks that use dynamic IP addressing.
Checking TCP/IP and IP Address Settings 33 ■ Sets applications which previously used a Dial-Up Networking connection to use a LAN connection. ■ (Optional) Configures a statically-configured PC to access the LAN Modem’s configuration screens, and, if you choose, changes the LAN Modem’s IP address to communicate with a statically-configured PC. If you prefer to follow the manual procedure for setting up TCP/IP, refer to “Setting Up Your Computer If You Have a Static IP Address” later in this chapter.
CHAPTER 3: BEFORE YOU BEGIN Adding TCP/IP to Your Protocols List Windows 95 and 98 If you ran the EZ-LAN Wizard on your computer and found that TCP/IP was not bound to your Ethernet adapter, follow the steps to add TCP/IP to your protocols list, according to your operating system: To add TCP/IP to your protocols list for Windows 95 or 98: You may be prompted for your Windows 95 or 98 installation disks or CD-ROM. 1 From the Control Panel, double-click Network. The Network dialog box appears.
Adding TCP/IP to Your Protocols List 35 The Select Network Protocol dialog box appears. Figure 18 Select Network Protocol Dialog Box 4 From the Manufacturers list box, select Microsoft, and then from the Network Protocols list box, select TCP/IP. 5 Click OK to exit the Select Network Protocol Dialog box. 6 Click OK again to exit the Network Dialog box. You may be prompted to re-boot your workstation. 7 Run the EZ-LAN Wizard again to optimize the settings on your workstation. Windows NT 4.
CHAPTER 3: BEFORE YOU BEGIN 2 Select the Protocols tab, as shown in Figure 19. Figure 19 Windows NT Protocols Configuration Window 3 Click Add. The Select Network Protocol window appears as shown in Figure 20. Figure 20 Select Network Protocol Window 4 Select TCP/IP Protocol, and then click OK.
Adding TCP/IP to Your Protocols List 37 The following message appears. Figure 21 DHCP Message Box 5 Select Yes, unless you know that you will be setting up the LAN Modem for use on a static network. By selecting Yes, you are setting up the LAN Modem to act as your DHCP server. If you will be connecting to a static network, select No. You are prompted to copy files. You may be prompted to insert your CD ROM. 6 If the necessary files already exist on your hard drive, click Continue.
CHAPTER 3: BEFORE YOU BEGIN Figure 23 Microsoft TCP/IP Properties Window 9 From the Adapter drop-down list box, select the Ethernet card that is connected to the Dual 56K LAN Modem. 10 Select Obtain an IP Address from a DHCP Server, unless you are setting up for static IP addressing. If this LAN uses static IP addresses, enter the IP address and subnet mask. 11 Click OK. 12 Click Yes to restart your PC and allow the changes to take effect.
Setting Up Your Computer If You Have a Static IP Address Setting Up Your Computer If You Have a Static IP Address 39 If your computer has a static IP address and you want to keep this for use with a network that uses or will use static IP addressing, you must make certain changes to the LAN Modem’s default parameters. These changes will allow your statically-configured PC to “talk” to the LAN Modem for its initial configuration. The procedure is described in this section.
CHAPTER 3: BEFORE YOU BEGIN Record Workstation’s Current Settings Change Workstation to Match LAN Modem Launch Browser Change LAN Modem IP Address for Static LAN Reset Workstation to Original Static Settings Figure 24 Set Up Steps for Statically Configured Workstation Setup Steps for a Static Workstation The first step is to record your current, statically-configured workstation’s network settings and set them aside for later use.
Setting Up Your Computer If You Have a Static IP Address 41 6 Change the IP address and subnet mask fields as follows (this allows your workstation to be recognized by the LAN Modem): ■ In the IP Address field, enter 192.168.1.2 ■ In the Subnet Mask field, enter 255.255.255.224 7 Click the Gateway tab. 8 Change the Gateway IP address to 192.168.1.1 9 Click OK to close the Network control panel. You are asked to restart your computer. 10 Click OK.
CHAPTER 3: BEFORE YOU BEGIN For Windows NT 4.0 Users 1 From the Start menu, select Settings and then Control Panel. 2 Double-click Network, and then click the Protocols tab. 3 Highlight TCP/IP, and then click Properties. 4 Click the IP Address tab, and then select the Ethernet card associated with the Dual 56K LAN Modem from the Adapter drop-down list box. 5 Write down the values listed in the IP Address, Subnet Mask and Default Gateway fields. You will need to reenter this information later.
4 INSTALLING THE DUAL 56K LAN MODEM This chapter explains how to connect your computer to the Dual 56K LAN Modem and install the cables in preparation for configuring the unit. When you first set up the LAN Modem, you initially connect only one computer to the unit. After you have finished configuring the LAN Modem from that computer using a standard web browser, you can then begin to network additional computers, hubs, and/or printers to the LAN Modem.
CHAPTER 4: INSTALLING THE DUAL 56K LAN MODEM RJ-11 2 E1 LIN E1 ON PH E2 LIN E2 ON PH RJ-11 RJ-11 4 1 Analog telephone cables N LA 3 RJ-11 T SE RE Figure 26 Analog Cable Connections You may need to use a country-specific phone adapter (optional). Installing Analog Equipment You can connect up to two analog devices, such as a touch-tone telephone, answering machine, or fax machine, to the Dual 56K LAN Modem’s two pass-through PHONE ports.
Before You Start the Installation 45 5 Connect the power supply to the back of the unit, as shown in Figure 28. LIN E2 P LIN 4 1 3 E1 ON PH E1 2 LA N T SE RE DC 8 V AX 10-18A M 0¥ 5 6 Figure 28 Power Cable Connection 6 Plug the other end of the power module into a surge-protected, standard wall outlet, and watch for the following front panel LED signals: ■ The PWR and AA indicator LEDs light up. ■ The ALERT LED flashes momentarily as the unit undergoes a power-up, self-test diagnostic.
CHAPTER 4: INSTALLING THE DUAL 56K LAN MODEM
5 CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS This chapter explains how to configure the Dual 56K LAN Modem for the most common application — shared Internet access. If you followed the instructions provided in the Getting Started Guide, you have already configured the LAN Modem for shared Internet access.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS In addition, you should have the following information ready as you go through the configuration: ■ Your Analog Telephone Number or Numbers ■ ISP Telephone Number ■ ISP User ID and Password ■ ■ Configuration Steps ISP DNS Address (required only if your ISP does not use dynamic IP addressing) (Optional) Call Waiting Disable Command (your telephone company can provide you with this value) The following steps guide you through con
Typical Configuration 49 The Set Password window appears. This password is used to guard access to the Dual 56K LAN Modem’s configuration program. If you would like to restrict access to the configuration settings, select a password and record it in a safe place. Figure 31 Set Password Window 3 Enter a password in the Password field and then enter the same password in the Password (repeat) field to confirm it. If you do not wish to enter a password, leave the fields empty.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS The Set Country and Telephone Numbers screen opens, as shown in Figure 32. Figure 32 Set Country and Telephone Numbers Screen 5 Choose your country from the drop-down list. 6 Enter your analog telephone number(s) including area code. This allows you to take advantage of BAP/BACP to add and remove channels as bandwidth demands. 7 Click Continue.
Typical Configuration 51 Figure 33 ISP Wizard Window 8 In the ISP Name field, choose any name that you wish to associate with your ISP. 9 In the Dial Out Prefix field, enter the number required to access an outside line. An example would be dialing “9” for use with a PBX. If not required, leave this field blank. 10 (Optional) In the Call Waiting Disable Command field, enter the value you obtained from your telephone company for disabling Call Waiting.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS The LAN Modem Support Web Site From the LAN Modem Support web site, you can register your Dual 56K LAN Modem, read any new and up-to-date information about your product, and perform firmware upgrades to the LAN Modem as they become available. To access this LAN Modem Support web site at any time, go to: http://www.3com.com/support/docs/lanmodem/.
The LAN Modem Main Configuration Page Setting Up Additional Service Provider Profiles 53 Now that you have finished configuring your Dual 56K LAN Modem, you can set up a total of four additional Service Provider profiles. The LAN Modem defines any remote dial-out destination (including the ISP profile you just configured) as a Service Provider.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS Figure 34 Dual 56K LAN Modem Main Configuration Home Page Even though the Main Configuration Page and its associated links are viewed within your web browser, you are looking at screens which reside inside the LAN Modem firmware, rather than on the World Wide Web. The Main Configuration Page provides links to configuration, dialing, statistics pages, and online help.
The LAN Modem Main Configuration Page 55 be disconnected because of network inactivity, keeping telephone usage and Internet access costs down. Links from the Buttons ■ Current Call Status: Takes you to the Current Call Information page, where you can view information on an active call or calls. ■ Home: Takes you back to the Main Configuration Home Page. ■ ISP Wizard: Allows you to configure an ISP profile using the ISP Wizard.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS Connecting an External Hub to the Dual 56K LAN Modem Once you have finished configuring the Dual 56K LAN Modem, you can connect up to three additional computers, or a combination of an external Ethernet hub and computers to increase the number of users for WAN access to 25. Figure 35 shows the more common scenario of an additional 8-port hub for a 10-user, shared WAN connection.
Connecting an External Hub to the Dual 56K LAN Modem 57 To connect the hub to the Dual 56K LAN Modem: 1 Insert one end of the Ethernet cable into any available LAN port on the back of the LAN Modem, as shown in Figure 36.
CHAPTER 5: CONFIGURING THE DUAL 56K LAN MODEM FOR INTERNET ACCESS
6 CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS This chapter explains how to configure the Dual 56K LAN Modem for shared access to a private network, such as a remote corporate office LAN. This includes the option of connecting to the Internet through your private network, if your private network allows you this option. For instructions on configuring advanced parameters, or configuring the LAN Modem for dial-in support, refer to Chapters 7 and 8, respectively.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS Configuration Steps The following steps guide you through configuration of the Dual 56K LAN Modem for shared access to a remote private network. If you ran the computer pre-checks in Chapter 3 and found that your computer was set up for static IP addressing, refer to the section “Changing the LAN Modem IP Address for Static IP Users” on page 67 once you have completed these initial configuration steps.
Configuration Steps 61 Figure 38 Set Password Window 3 (Optional) Enter a Password in the Password field, and enter it again in the Password (repeat) field to confirm it. If do not wish to enter a Password, leave the fields empty. 4 Click Submit. A message box indicates that your password has been set. The Set Country and Telephone Numbers screen opens, as shown in Figure 39. Figure 39 Set Country and Telephone Numbers Screen 5 Choose your country from the drop-down list.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS The ISP Wizard appears. 7 Click Abort to bypass the ISP Wizard and go directly to the LAN Modem’s Main Configuration Page, also called the WebWizard. The LAN Modem homepage opens, as shown in Figure 40. Figure 40 Dual 56K LAN Modem Main Configuration Home Page 8 From the Main Configuration Home Page, click the Service Providers icon. The Service Provider Selection window appears, as shown in Figure 41.
Configuration Steps Figure 41 Service Provider Selection Window 9 Select New (Private Network) from the drop-down list box, and click Select.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS The Private Network Parameters window appears, as shown in Figure 42. Figure 42 Private Network Parameters Window 10 In the Name field, enter a name for this remote destination, such as the location of the remote office. 11 In the Dial Out Prefix field, enter the number required by your location to reach an outside line, if necessary. An example would be dialing “9” for use with a PBX. If not required, leave this field blank.
Configuration Steps 65 dial out prefix, leave the Dial Out Prefix field blank and enter that prefix value as part of the individual telephone number field itself (for example, ‘918005551000’). 13 In the Telephone Number 1 field, enter the telephone number that you obtained from your Network Administrator for accessing this private network.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS 21 Choose whether or not you want users on the LAN to be able to access the Internet through your private network’s direct Internet connection, if your private network allows you this option. 22 Choose whether or not you would like to use PPP Data Compression when transferring data.
Changing the LAN Modem IP Address for Static IP Users 67 This completes the configuration for private network access. A message appears indicating that your parameters have been set. If a connection script is necessary, refer to Chapter 7, “Using a Connection Script,” for assistance. If you chose to password-protect the configuration profile of the Dual 56K LAN Modem and would like to lock and/or change the configuration, refer to Chapter 7, “Locking and Unlocking the Configuration.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS If you have an ISP account and would like to set up an Internet Service Provider profile for shared Internet access, refer to Chapter 7, “Configuring Additional Service Providers.
The LAN Modem Main Configuration Page Links from the Buttons 69 ■ LAN Parameters: Takes you to the LAN Parameters page, where you can configure Ethernet parameters for your LAN Modem. ■ Data Call Parameters: Takes you to the Data Call Parameters page, where you can change settings for Multilink calls and set inactivity timers to allow calls to be disconnected because of network inactivity, keeping telephone usage and Internet access costs down.
CHAPTER 6: CONFIGURING THE DUAL 56K LAN MODEM FOR PRIVATE NETWORK ACCESS The LAN Modem Support Web Site If you configured your LAN Modem for indirect access to the Internet through your private network, you may wish to visit the LAN Modem Support web site, where you can register your Dual 56K LAN Modem, read any new and up-to-date information about your product, and perform firmware upgrades to the LAN Modem as they become available.
7 ADVANCED CONFIGURATION This chapter provides instructions on setting up additional Service Provider profiles (Internet or Private Network), changing your Dual 56K LAN Modem’s default settings, and configuring advanced parameters. You should first have configured the LAN Modem for Internet access and/or Private Network access following the instructions in Chapters 5 or 6 before attempting to configure advanced parameters.
CHAPTER 7: ADVANCED CONFIGURATION Adding an Internet Service Provider If you have already configured one Internet Service Provider using the ISP Wizard, as part the initial setup, follow the instructions in this section to add another Internet Service Provider.
Configuring Additional Service Providers 73 The Internet Service Provider Parameters window appears. Figure 45 ISP Parameters Window 3 In the Name field, choose any name that you wish to associate with this ISP. 4 In the Dial Out Prefix field, if applicable, enter the number required by your location to reach an outside line, if necessary. An example would be dialing “9” for use with a PBX. If not required, leave this field blank.
CHAPTER 7: ADVANCED CONFIGURATION 6 In the Telephone Number 1 field, enter the telephone number you must dial in order to reach your ISP.
Configuring Additional Service Providers 75 With NAT enabled, the LAN Modem makes translations between a single (Internet-routable) IP address issued to it dynamically by the ISP and individual IP addresses of the computers on the LAN (these are also dynamically assigned, but by the LAN Modem). This translation allows multiple users on the LAN to access the ISP by appearing to be a single connection with a single IP address.
CHAPTER 7: ADVANCED CONFIGURATION Adding a Private Network Service Provider Editing Service Provider Profiles To add a service provider profile for connection to a remote private network, follow the instructions provided in Chapter 6, “Configuring the Dual 56K LAN Modem for Private Network Access.” The following steps allow you to edit a previously configured service provider connection. 1 From the Main Configuration Home Page, click the Service Providers image.
Using a Connection Script 77 If you have more than one ISP configured, all automatic calls, such as a call to the Internet as a result of launching a Web browser, will be routed to the ISP listed in the first column of the table. If you want your automatic calls to be routed to one of the other listed ISPs, clear the box(es) for any ISP(s) that you do not wish to use at this time. The call will go to the first ISP checked. Click Submit to save your changes.
CHAPTER 7: ADVANCED CONFIGURATION . Figure 46 Script Configuration Page Creating a Connection Script You can create a script from any other text editor of your choice and copy and paste the script directly into the Script Configuration text box. Or you may use the buttons located along the left side of the script window to guide you through the scripting process. Connection Script Command Syntax The following section explains the valid script command syntax.
Using a Connection Script 79 execution will abort. The maximum string length is 64 characters, and the acceptable second is between 1-60. ■ Using the Configuration Buttons The End command completes your script. The last line of your script must conclude with end. To create a connection script using the configuration buttons, do the following. 1 From the Script Configuration page, click Begin. The text begin is entered as the first line in the script window.
CHAPTER 7: ADVANCED CONFIGURATION Add any additional Transmit or WaitFor text as required. Note that a carriage return is simulated by including ^M within the quotation marks of your transmitted text. For example: transmit “mypassword^M” will send your password along with a carriage return. 12 Click End when your script is complete. The last line of text in your script must conclude with end. An example of a completed script is shown in Figure 47.
Configuring LAN Parameters Configuring LAN Parameters 81 This section tells you how to configure the parameters of your LAN. A description of each LAN parameter is provided, followed by the configuration steps. The LAN (Ethernet) Parameters window is shown in Figure 48. Figure 48 LAN (Ethernet) Parameters Window Understanding LAN Parameters The LAN (Ethernet) Parameters window contains the following fields: Name Displays the name for the Dual 56K LAN Modem.
CHAPTER 7: ADVANCED CONFIGURATION reconfigure the workstations’ IP addresses via the Workstations Parameters window. For a LAN using dynamic IP addresses, restart your workstation to acquire a new IP address. Or, if you have Windows 95 or 98, launch winipcfg.exe (probably located in your Windows directory), and click Release All and then Renew All. For Windows NT, run ipconfig /release and then ipconfig/renew. Local Domain Name The local domain name identifies your LAN.
Configuring V.90 Modem Control Parameters 83 4 In the Local Domain Name field, you may choose to enter a name to identify this particular LAN on a network. Note that this field is not required. Leave blank if you are unsure about how to configure a local domain name. 5 Check the Enable DHCP server box to enable it or clear the box to disable it.
CHAPTER 7: ADVANCED CONFIGURATION Changing Modem Controls To access and make changes to the Modem Control parameters, do the following. 1 From the Main Configuration Page, click the Service Providers icon. 2 Choose the service provider whose associated modem parameters you want to change, and click Select. The procedure for accessing the Modem Settings profile is the same for both an ISP and a Private Network. The selected Service Provider page opens.
Changing Data Call Parameters 85 6 Click Submit to save your changes. Note that each service provider (up to four) has its own associated Modem Settings profile. Changes made to one service provider will affect only that particular service provider. Changing Data Call Parameters This section explains how to configure Data Call Parameter settings. The data call parameters consist of Timeout Values for both automatic and manual calls, as well as Bandwidth on Demand Parameters for Multilink calls.
CHAPTER 7: ADVANCED CONFIGURATION Timeout Values Minimum Call Duration for outgoing calls. The minimum call duration is the minimum length of time that a call must stay up before an inactivity timer can begin. The default is two minutes. Disconnecting an Outgoing Automatic Data Call. An automatic data call is made by the LAN Modem whenever it detects activity on the LAN requiring a remote connection; an example would be a user launching his or her Web browser.
Specifying a WINS Server Address 87 indicate the bandwidth percentage threshold at which to allocate of remove the second channel. By default this threshold is 60%. Connect Delay. If you had specified use of the second channel “only as needed” under your Service Provider settings, indicate the length of time that the LAN Modem should wait before adding the second channel, once the default threshold has been breached. By default the length of time is 10 seconds. Disconnect Delay.
CHAPTER 7: ADVANCED CONFIGURATION 4 Click Submit. Configuring the Local DNS Table The Dual 56K LAN Modem includes a local DNS Table for configuring up to ten static DNS entries. This allows the LAN Modem to resolve designated IP addresses locally. The Local DNS Table can be used to suppress spurious calls which can occur when an application on the LAN generates packets which in turn launch an unwanted call to your service provider. For example, to suppress spurious calls, do the following.
Reserving DHCP Addresses 89 Figure 51 Local DNS Table 3 Enter the domain names and IP addresses as desired, and click Submit to save changes. Reserving DHCP Addresses If you have workstations on your LAN with static IP addresses and other workstations on the same LAN with dynamic IP addresses, it is recommended that you reserve the static IP addresses in the DHCP server to ensure that they are not dynamically assigned to another workstation. Reserve DHCP addresses as follows.
CHAPTER 7: ADVANCED CONFIGURATION 3 Enter the same password in the Password (repeat) field to verify. Make sure you have deleted the old password completely before reentering the new password. 4 Check the box if you wish to disable password protection for the Manual Calling screen only. This allows workstations on the LAN to access only the Manual Calling screen from the LAN Modem Home Page without a password, so that they can place and terminate manual calls.
Using Selective Password Protection Using Selective Password Protection 91 You can set up partial password protection so that workstations may access only the Manual Calling screen, allowing them to manually place and receive calls only. In this case, all other WebWizard pages remain inaccessible. Note that enabling selective password protection also allows all users access to the LAN Modem Home Page so that they can navigate to the Manual Calling screen.
CHAPTER 7: ADVANCED CONFIGURATION Changing the Remote Administration Password By default, the Dual 56K LAN Modem’s default Remote Administration Username is Admin, and the Password is 1234. For security purposes, it is recommended that you change the default password. To do so, follow these steps: 1 From the Dual 56K LAN Modem Main Configuration Page, click the Dial-in button. 2 Click the Dial-in User button. The Dial-in User Selection window opens. 3 Select Admin, and then click Next.
Configuring the LAN Modem from a Remote Location Configuring the LAN Modem Remotely via an Analog Modem 93 To dial into a LAN Modem from a remote location using an analog modem and Windows 95/98 Dial-Up Networking, follow these steps: 1 Click Start, Programs, Accessories, (Windows 98 users select Communications) and select Dial-Up Networking. 2 Double-click Make New Connection. The Make New Connection window opens. 3 Enter a name to designate this dial-up profile, such as LAN Modem.
CHAPTER 7: ADVANCED CONFIGURATION 20 Once your call has been established, launch a Web browser on your local computer. The Web browser attempts to load its default Start Page. Click Stop to cancel this procedure. 21 Enter the following address in your Web browser’s address bar: http://192.168.1.1 to go to the remote LAN Modem’s Main Configuration Page.
8 CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT This chapter describes how to configure the LAN Modem for dial-in support. The following topics are covered. ■ Understanding Dial-in Basics ■ Understanding the Three Dial-in Profile Types ■ Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support ■ Part II. Configuring a Client Device for Dial-out Access The configuration windows shown in this chapter may differ slightly from what is displayed on your computer.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Understanding the Three Dial-in Profile Types Single User Dial-in When you create a Dial-in User Profile as part of the server-side LAN Modem configuration process, you must select from among three Dial-in Profile Types to identify the type of client device that will dial in to the server-side LAN Modem. This section explains the three dial-in profile types and tells you when to select one over the other.
Understanding the Three Dial-in Profile Types 97 Figure 53 Single User Dial-in from an Analog Modem 192.168.1.2 19 192.168.1.3 192.168.254.1 MODEM 1 Message AA Alert 192.168.1.4 192.168.1.5 Server-side LAN Power CD RD SD MODEM 2 OH AA CD RD SD LAN Status OH TX COLL 1 2 3 4 OfficeConnect Dual 56k LAN Modem Public telephone network OfficeConnect Dual 56K LAN Modem Server-side LAN Modem issues single IP address to client-side LAN Modem 2 .2. 68 2.1 192.168.254.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT This is because the called LAN Modem acts as the DNS server for workstations attached to the calling LAN Modem. An example of a LAN Modem Site-to-Site setup is shown in Figure 55. 192.168.1.2 The called LAN Modem acts as DNS server to perform workstation name-to-IP address resolution for this call 192.168.1.3 192.168.1.1 MODEM 1 Message AA Alert 192.168.1.4 192.168.2.2 CD RD SD MODEM 2 AA OH CD RD SD COLL 1 2 3 192.
Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support Part I.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT 6 Click Submit. This completes the change to the Remote Administration account. Go on to “Configuring Dial-in Global Parameters.” Configuring Dial-in Global Parameters The Dial-in Global Parameters allow you to set dial-in preferences that will apply to all dial-in users. These include designating a Callback prefix, setting a Site Number for LAN-to-LAN dial-in, configuring Auto Answer, and setting authentication preferences.
Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support 101 5 If you are planning to use the Callback feature, use the Callback Prefix field to enter the number required to reach an outside line, such as a 9. Otherwise, leave this field blank. 6 In the LAN-to-LAN Site Number drop-down list box, designate the LAN Modem site for dial-in access from other LAN Modems (which will dial into this LAN Modem via the Site-to-Site scenario).
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Once the LAN Modem has changed its IP address, you will no longer be able to access the configuration screens through your Web browser until you re-start your workstation and allow it to acquire a new IP address from the LAN Modem’s new subnet. 10 If you chose Site B or C, re-start your workstation. This will allow your workstation to acquire an IP address as part of the LAN Modem’s new subnet.
Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support 103 The Dial-In Wizard Profile Type Selection window appears, as shown in Figure 58. Figure 58 Dial-In Wizard Profile Type Selection Window 3 Select Single User from the drop-down list, and then click Next.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT The Dial-In Wizard Password window appears, as shown in Figure 59. Figure 59 Dial-In Wizard Password Window 4 Enter a unique Username and Password which the dial-in user must enter when calling in to this LAN Modem. This information will be entered in the Username and Password fields when you configure your client device. 5 Click Next. The Dial-In Wizard Internet Service Provider Selection window appears.
Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support 105 Figure 60 Dial-In Wizard Internet Service Provider Window 6 Select an Internet Service Provider for this dial-in user to use when accessing the Internet from the remote location. 7 Click Finish. This completes the server-side portion of the configuration process for a Single User dial-in.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Figure 61 Dial-In Wizard Profile Type Selection Window 3 Select LAN Modem Site-to-Site from the drop-down list, and then click Next. The Dial-In Wizard Password window appears, as shown in Figure 62. Figure 62 Dial-In Wizard Password Window 4 Enter a unique Username and Password for the second site LAN Modem.
Part I. Configuring the Server-side Dual 56K LAN Modem for Dial-in Support 107 This information will be entered in the Username and Password fields when you configure a Private Network Service Provider profile in the second site LAN Modem. 5 Click Next. The Dial-In Wizard Site Assignment window appears, as shown in Figure 63.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Figure 64 Dial-In Wizard Internet Service Provider Window 8 Select an Internet Service Provider for this dial-in user to use when accessing the Internet from the remote location. 9 Click Finish. This completes the server-side portion of the configuration for LAN Modem Site-to-Site Dial-in. To allow for Site-to-Site configuration, you must also do the following: ■ Configure this LAN Modem as a client-side device. Refer to “Part II.
Part II. Configuring a Client Device for Dial-out Access 109 The Dial-In Wizard Profile Type Selection window appears, as shown in Figure 65. Figure 65 Dial-In Wizard Profile Type Selection Window 3 Select Advanced from the drop-down list, and then click Next. The password page appears. 4 Enter a unique Username and Password to identify and verify this analog router when it calls in to the LAN Modem.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Configuring a LAN Modem Using Single-User Dial-out Access Before You Start the Configuration Changing the LAN Modem’s IP Address To configure a LAN Modem that will use the Single-User scenario to access a remote LAN Modem, you create a Private Network Service Provider profile much as you would for standard Private Network access. You must first, however, perform the additional step of changing the LAN Modem’s IP address.
Part II. Configuring a Client Device for Dial-out Access 111 configuration first will ensure that the LAN Modem occupies a subnet different from the LAN Modem into which it will be dialing.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Figure 66 Private Network Parameters Window 3 In the Name field, enter a name for this Service Provider, such as the location of the server-side LAN Modem. 4 In the Dial Out Prefix field, if applicable, enter the number required by your location to reach an outside line, if necessary. An example would be dialing “9” for use with a PBX. If not required, leave this field blank.
Part II. Configuring a Client Device for Dial-out Access 113 6 In the Alternate drop-down list box, you can select Alternate and enter the second LAN Modem telephone number, to be dialed if the first number is unavailable. Or, if the server LAN Modem was set up to allow Multilink dial-in calls, select Multilink and enter the second telephone number. Otherwise leave this field blank.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT 14 For Network Address Translation, your choice depends on the Dial-User Profile Type that you selected for this LAN Modem, as follows: ■ ■ If you are configuring this LAN Modem for Single-User LAN Modem using NAT, leave NAT enabled. If you are configuring this LAN Modem for LAN Site-to-Site, disable NAT. 15 Under WAN Link IP address, leave these fields blank. The LAN Modem will automatically assign these values upon connection.
Configuring Dial-in User Parameters 115 Figure 67 Dial-in User Selection Screen 2 Choose either New Dial-in User to create a new profile, or choose an existing Dial-in User from the drop-down list, and click Select. The Dial-in User Parameters screen opens, as shown in Figure 68.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Figure 68 Dial-in Users Parameters Screen 3 In the Name field, enter a unique name to designate this dial-in user. 4 In the Password field, enter a password to verify access when this user dials into the LAN Modem.
Configuring Dial-in User Parameters 117 7 In the ISP Selection field, select the service providers that this dial-in user can access. 8 In the Data Compression field, choose to have data compression active or inactive. By default compression is disabled. (In order for compression to occur, the other end of the connection must also have compression active.) Callback Parameters This section allows you to enable and configure callback functionality.
CHAPTER 8: CONFIGURING THE DUAL 56K LAN MODEM FOR DIAL-IN SUPPORT Placing a Call from a Client-side LAN Modem Once you have created a service provider profile on your client LAN Modem, you can place a call in one of three ways: 1 Use the client LAN Modem’s Manual Call Control page to place a call manually. 2 Use the LAN Modem Desktop Manager on a client workstation to place a call manually.
9 PLACING, RECEIVING AND DISCONNECTING CALLS This chapter covers the following main topics: Using the LAN Modem Desktop Manager (Windows only) ■ Using the LAN Modem Desktop Manager (Windows only) ■ Placing calls ■ Receiving calls ■ Disconnecting calls The LAN Modem Desktop Manager for Windows 95, 98, NT, and 2000 provides direct access to LAN Modem call functionality directly from the Windows desktop, without requiring the use of a Web browser.
CHAPTER 9: PLACING, RECEIVING AND DISCONNECTING CALLS Placing a Call Automatically To place a call using one of your four pre-defined service provider profiles, simply launch the application. For example, if you have an ISP configured as one of your service providers, launching a Web browser such as Netscape Navigator or Internet Explorer will cause the LAN Modem to automatically dial and connect you to this pre-configured ISP.
Receiving Calls Placing a Call Manually to a Temporary Service Provider 121 You can also manually place a call to a service provider that has not been previously configured, as long as that service provider issues IP addresses dynamically to the calling party. To place a call manually to a temporary location, follow these steps: This call profile will remain under TempSvcProvider until you change the settings of these fields. 1 From the LAN Modem Home Page, click the Manual Calling button.
CHAPTER 9: PLACING, RECEIVING AND DISCONNECTING CALLS ■ Downloading the latest firmware. Refer to Chapter 10, “Downloading Firmware to Your Dual 56K LAN Modem,” for instructions. ■ Reviewing Dual 56K LAN Modem statistics Refer to Chapter 10, “Reviewing Statistics,” for instructions. Auto Answer must be enabled for your LAN Modem to receive an incoming data call. Note that Auto Answer is disabled by default.
Disconnecting Calls Disconnecting Calls Automatically Using Timers 123 Disconnect timers are set via the Data Call Parameters window. Specifically, you can set the following parameters: Minimum Call Duration Enter the minimum length of a call that must be reached before the Dual 56K LAN Modem detects inactivity on the connection and then starts an inactivity timer. The default is 120 seconds (two minutes), which is also the lowest value allowed for this field.
CHAPTER 9: PLACING, RECEIVING AND DISCONNECTING CALLS
10 TROUBLESHOOTING AND MAINTENANCE This chapter explains how to isolate and solve problems encountered with the Dual 56K LAN Modem, such as problems caused by incorrect settings or improper installation. Basic maintenance information for the Dual 56K LAN Modem is also provided.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE Monitoring the Alert LED Monitoring the LAN Status LEDs Power cycle the Dual 56K LAN Modem and observe the Alert LED. During the power-up self-test, the Alert LED will remain lit. ■ If the Alert LED goes off, the test has been successful. ■ If the Alert LED flashes for more than several seconds, it means the LAN Modem is either in firmware download mode or there is an internal failure.
Evaluating Symptoms and Solutions Table 6 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Incompatible IP address on your computer Reset the IP address on your computer, as follows: Windows 95 and 98: 1 Run winipcfg.exe. 2 Select the Ethernet adapter connected to the Dual 56K LAN Modem. 3 Click Release All and then Renew All. Windows 2000 and NT 4.0: 1 Run ipconfig /release and then ipconfig /renew. Macintosh: 1 From the Apple menu, select Control Panels, and then TCP/IP.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE Table 6 Symptoms, Causes, and Solutions Symptom Possible Cause Clicking Submit in the LAN Modem’s configuration pages does not take you to the next screen JavaScript may not be enabled in Enable JavaScript in your Web browser your Web browser. Refer to your browser’s documentation for information. Sending SMTP mail is slow. Only one workstation to one server is supported at one time for SMTP mail.
Evaluating Symptoms and Solutions Table 6 Symptoms, Causes, and Solutions Symptom Possible Cause Solution You are using only one telephone If you are only using one telephone line with your LAN line with the LAN modem, and it Modem, it must be connected to Line 1. In this case, is connected to the Line 2 port. make sure that you connect the telephone line to the port labeled “Line 1” on the LAN Modem’s back panel. Outgoing calls have been disabled. Make sure that outgoing calls are enabled.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE Table 6 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Auto Answer is set to Disable. Auto Answer must be enabled for the LAN Modem to answer incoming data calls. By default Auto Answer is disabled. Refer to “Configuring Dial-in User Parameters” for more information. (continued) LAN Modem is not answering Dial-in data calls Browser is not displaying newly Web browser may be caching entered information. older pages.
Finding More Information 131 Finding More Information For more information about the Dual 56K LAN Modem, such as Frequently Asked Questions and specific technical notes, go to the following URL, http://www.3com.com/support/docs/lanmodem and bookmark this site for quick and easy access. Contacting Technical Support Contact your Network Supplier or refer to the technical support card that was included with your LAN Modem to find the technical support telephone number for your location.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE The Dual 56K LAN Modem reinitializes itself, and goes back to its factory default settings. All user-entered information has been erased. Reviewing Statistics ■ Restart your computer. ■ Launch your Web browser. Various statistics about LAN and WAN parameters are stored and available for review. To view statistics, follow these steps: 1 From the Dual 56K LAN Modem Main Configuration Home Page, click the Statistics button.
Reviewing Statistics Understanding Current Call Information 133 The current call statistics are described in Table 8. Table 8 Current Call Statistics Description Current Call Information Description Connect Message Indicates the modem CONNECT message received for the current call. Call direction Indicates whether the current call is incoming or outgoing. Service provider name Indicates the destination to which the current call is connected.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE Table 9 Last Call Statistics Description Last Call Information Description Number of octets transmitted Indicates the number of octets (bytes) transmitted by the Dual 56K LAN Modem. Called telephone number Indicates the telephone number dialed to reach the service provider for the last call. Reason for call coming up Indicates how the call was placed and which workstation placed the call. Typical entries you may see are: “Manual Dial by Workstation A.
Synchronizing the LAN Modem Clock 135 the LAN Modem. You can manually synchronize this internal clock to match the date and time of another attached workstation. To update the LAN Modem’s Real Time clock: 1 From the LAN Modem Main Configuration Page, click the Advanced button. 2 Click the Maintenance button. 3 Click the Update LAN Modem’s clock button (you may have to scroll down to see it). The LAN Modem synchronizes its clock to match the date and time on your workstation. The Set Password page opens.
CHAPTER 10: TROUBLESHOOTING AND MAINTENANCE
A NETWORKING PRIMER This chapter provides a description of basic networking concepts and modem terminology to help you better understand the key functionality of the Dual 56K LAN Modem. What is a network? What is a LAN? A network is a set of computers and other devices, such as printers, servers, hubs, and modems, that are connected together either directly through cabling, or indirectly through dial-up telephone or other services.
APPENDIX A: NETWORKING PRIMER 10 Mbps Ethernet LAN ted nnec re Co Mo 3 Com Figure 69 Example of a LAN What is a WAN? A WAN (Wide Area Network), often referred to as “the WAN,” is that portion of a network which involves use of the pre-existing public telephone network and network infrastructures, such as the public Internet, or long-distance carrier services such as DSL or cable, for transporting data over long distances and a wide geographical area.
What is a network? 139 What is a POTS connection? POTS stands for “Plain Old Telephone Service” and refers to a basic, analog telephone connection without any added features or functions. A POTS line is used to connect analog devices, such as a telephone, fax machine, or your Dual 56K LAN Modem, to the public telephone network.
APPENDIX A: NETWORKING PRIMER What is an IP Address? An IP address is a numeric value of a set form—32 bits, or binary digits of either one or zero—which is used within a TCP/IP network to uniquely identify the location of every device within the network for purposes of routing data. Each bit is in actuality a digital signal representing either a one or zero.
What is a network? 141 reserved for other purposes). By contrast, a Class A network’s IP address allocates eight bits for the network number and 24 bits for the local address, allowing for a possible combination of 16,777,214 (224-2) local addresses. To return to the postal analogy, just as a street address refers to the set location or residence itself and not to the occupant, who may change over time, an IP address refers to a device’s location and not the device itself.
APPENDIX A: NETWORKING PRIMER A private organization’s internal router uses this new breakdown of (longer) network number and (shorter) host number to route data to subdivided areas, or subnets, within the broader “network” (as identified by the original network number). The temporary, longer network number identifies the subnet within the broader network, and the temporary, shorter host number identifies the exact location of a host within that subnet.
What is a network? 143 If your LAN will not connect to the public Internet, you can set up your own unique (that is, private) IP address numbering. IP addresses for private networks such as an office LAN must also be unique but only within that LAN. What is DHCP? Dynamic Host Configuration Protocol is a process that automatically assigns a unique, temporary IP address to a newly attached computer on an IP network.
APPENDIX A: NETWORKING PRIMER throughput. On the LAN side, computers on a typical network can communicate with each other at up to 10 Mbps. When dialing up to a long distance location using 56K, you can establish a network connection speed of up to 56 Kbps without compression or up to 115.2 Kbps with compression. If you are dialing into the Internet, the speed of the router providing access must also be considered. In addition, the Internet itself may have speed limitations.
What is a network? 145 connected ISP. By bypassing the analog-to-digital conversion in the downstream path, 56K technology can use nearly all of the available 64K network bandwidth. (Upstream data, typically less sensitive, travels at the standard V.34 rate of 33.6K.) Based on “encoding” rather than “modulation”, the result is download speeds once thought not possible. Older, V.
APPENDIX A: NETWORKING PRIMER
B INSTALLING AND USING THE VIRTUAL FAX MODEM This appendix describes the installation of the Virtual FAX Modem application (included on the OfficeConnect Dual 56K LAN Modem Companion Programs CD-ROM) for use with your Dual 56K LAN Modem. The Virtual FAX Modem application allows Windows 95, 98, NT 4.0, and 2000 users to use the LAN Modem as if it were directly connected to your computer’s COM port. This permits direct connections to online services such as America Online (version 4.
APPENDIX B: INSTALLING AND USING THE VIRTUAL FAX MODEM After your computer has been rebooted, the Virtual Fax Modem icon will be placed in the lower right corner of the Windows desktop. The Presets field located in the Virtual Fax Modem application has been pre-selected for use with the LAN Modem and should be left set to its default value. The next step is to install the LAN Modem Virtual COM port driver into the Windows operating system.
Installing the Virtual FAX Modem Configuring the LAN Modem for use with the Virtual Fax Modem 149 Once you have installed the Virtual Fax Modem application and the LAN Modem COM port driver, you can further define the manner in which the Virtual Fax Modem interacts with the LAN Modem. This is done via the Virtual Fax Modem Parameters page. To access the Virtual Fax Modem Parameters page, do the following. 1 From the LAN Modem main page, click the Advanced button. The Advanced submenu opens.
APPENDIX B: INSTALLING AND USING THE VIRTUAL FAX MODEM ■ Telephone Line: This field is used to assign the phone line to be used by the Virtual Fax Modem. By default, this field is set to Any, permitting the use of the first available line. To always use telephone line 1 choose One. To always use telephone line 2 choose Two. 4 Click Submit. This completes the installation and setup of the Virtual Fax Modem. Windows applications can now access the Virtual Fax Modem for sending Class 2.
C CREATING A VIRTUAL PRIVATE NETWORK (VPN) TUNNEL This appendix tells you how to create a VPN tunnel from a client workstation, using the appropriate client software. Creating a Virtual Private Network (VPN) Tunnel The Dual 56K LAN Modem’s support of the PPTP protocol allows you to establish a Virtual Private Network tunnel between a workstation attached to the LAN Modem and a remote private network LAN.
APPENDIX C: CREATING A VIRTUAL PRIVATE NETWORK (VPN) TUNNEL Initiating the VPN Tunnel Once the PPTP tunnel server has been set up at the private network and all client workstations that will use a VPN tunnel have been set up with client software, each user simply initiates a tunnel from his or her workstation. Because the steps for initiating a tunnel vary according to the client software used, refer to the documentation provided with your PPTP software for the specific steps.
D FACTORY DEFAULTS This appendix lists the factory default settings of the Dual 56K LAN Modem. Dual 56K LAN Modem Factory Defaults Refer to Table 12 for the Dual 56K LAN Modem factory defaults. Table 12 Dual 56K LAN Modem Factory Defaults LAN Parameters LAN Modem IP Address 192.168.1.1 Subnet Mask 255.255.255.
APPENDIX D: FACTORY DEFAULTS
E SPECIFICATIONS This appendix describes the specifications of the Dual 56K LAN Modem. ■ Specifications Year 2000 Compliance Refer to Table 13 for the Dual 56K LAN Modem specifications. Table 13 Dual 56K LAN Modem Specifications WAN Interface Analog (POTS) telephone service provided by the telephone company WAN (Analog) Connectors RJ-11 LAN Interface Ethernet IEEE 802.3 10BASE-T standard Physical Dimensions Depth 7.3 in (185.4 mm) Width 8.7 in (220 mm) Height 2.15 in (54.6 mm) Weight 2.
APPENDIX E: SPECIFICATIONS
GLOSSARY analog signals A variety of signals and wavelengths that can be transmitted over communications lines. An example is a voice call over the phone line. BACP/BAP Bandwidth Allocation Control Protocol (BACP) and Bandwidth Allocation Protocol (BAP) are used in conjunction with the Multilink PPP feature. When Multilink PPP is negotiated, the BACP negotiates with the peer equipment to determine whether the peer supports BAP.
GLOSSARY PPP calls to improve data transfer times using a compression method called hi/fn LZS. DBA default DHCP Dynamic Bandwidth Allocation. DBA is a method of reallocating bandwidth (such as a second modem channel) automatically. DBA allows you to place a voice call while a Multilink PPP call is active. Value set at the factory. Dynamic Host Configuration Protocol. DHCP allows a server to automatically assign an IP address to a newly-attached computer on an IP network. DNS Domain Name System.
GLOSSARY 159 Modem’s two 56K lines, Multilink PPP is used to combine these two 56K connections into a virtual, single 112K connection. NetBIOS filtering NetBIOS filtering is a LAN Modem feature that helps prevent the LAN Modem from establishing unwanted calls. This feature filters the DNS requests made by NetBIOS that inadvertently cause the LAN Modem to place a call. NetBIOS is a protocol primarily used by Windows 98, 95 and NT for local file and printer sharing.
GLOSSARY V.34 V.34+ An ITU standard that currently allows data rates as high as 28,800 bps. An enhancement to V.34 that enables transfer rates as high as 33, 600 bps. V.90 V.90 is the ITU standard which allows modems to receive data at up to 56Kbps over the standard, public switched telephone network (PSTN). V.90 technology exploits the digital connections that most Internet and on-line service providers use at their end to connect to the PSTN, such as a T1 or an ISDN BRI line.
3Com Corporation LIMITED LIFETIME WARRANTY OfficeConnect Dual 56K LAN Modem HARDWARE 3Com warrants this hardware product to be free from defects in workmanship and materials, under normal use and service, for the following length of time from the date of purchase from 3Com or its authorized reseller: Lifetime, except that the fan and power supply hardware (if any) are warranted for one (1) year 3Com’s sole obligation under this express warranty shall be, at 3Com’s option and expense, to repair the defectiv
Dead- or Defective-on-Arrival. In the event a product completely fails to function or exhibits a defect in materials or workmanship within the first forty-eight (48) hours of installation but no later than thirty (30) days after the date of purchase, and this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and a replacement shall be provided by advance replacement.
REGULATORY AND APROVAL INFORMATION EUROPEAN UNION This device complies with the requirements of European Directive 1995/5/EC. IC (INDUSTRY CANADA) ■ Equipment Jack: CA-11A This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the radio interference regulations of Industry Canada (formerly the Canadian Department of Communications).
ii. Caller identification information (which occurs between the first and second ring cadence) is not destroyed. This equipment does not meet Telecom’s impedance requirements. Performance limitations may occur when used in conjunction with some parts of the network. Telecom will accept no responsibility should difficulties arise in such circumstances. The code for Call Waiting disable is *52 on the Telecom New Zealand telephone network.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could effect the operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make necessary modifications to maintain uninterrupted service.
A Advanced Dial-in explained 98 Alert LED 126, 128 analog equipment installation 44 Auto Answer configuring 101 manually 122 with the Desktop Manager 122 Dynamic Bandwidth Allocation (DBA) defined 27 dynamic IP address versus static 32 F B back panel description 17 BACP/BAP defined 27 firmware checking for updates 94 H hub connecting to the LAN Modem 56 configuring 87 outgoing calls preventing 87 P password changing 89 selective protection 91 Password Authentication Protocol (PAP) 19 Phone port 4
V Virtual Fax Modem explained 28 virtual fax modem configuring LAN Modem 149 installing 147 installing COM Port driver 148 terminating calls 150 virtual private network using with Windows 152 virtual private network (VPN) creating 151 virtual private networks explained 29 W warranty 20, 161 Web site LAN Modem Support 52 WebWizard 53 WINS server specifying 87
