® OfficeConnect® 56K LAN Modem 3C886 User Guide http://www.3com.com/ Part No.
3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 3Com Corporation, 1999. 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 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: Additional Safety Information ■ Take exceptional care during the installation and removal of the unit. ■ Use the power adapter supplied with the unit to ensure compliance with national safety standards. ■ Disconnect the power adapter before moving the unit.
■ Be sure nothing rests on the unit’s system cables and that the cables are not located where they can be stepped on and cause damage to the unit. ■ Keep the unit away from radiators and heat sources. Allow 1 inch (25mm) around the unit to provide adequate air circulation. ■ Install the unit in a clean area that is free from dust or extreme temperatures. ■ Allow a clearance gap of at least a 6 inches (150 mm) from the rear panel of the unit, to allow for cable access.
TABLE OF CONTENTS IMPORTANT SAFETY INFORMATION Additional Safety Information 3 ABOUT THIS GUIDE Introduction 11 How to Use This Guide Conventions 11 Year 2000 Compliance 1 11 12 INTRODUCTION Introduction 13 56K Access 13 Applications 13 Local Networking with Access to the Internet 14 Local Networking with Access to a Remote Office 14 Features 15 Ease of Installation and Use 15 High Performance 15 Connectivity 15 Routing 15 Bandwidth Management 15 Remote Management 15 Protocols 16 Error Control and Dat
WAN Connection 21 One High Speed Connection 21 Sharing the Connection 21 Call Routing Protocol and IP Address Translation 22 Placing a Call to a Previously Defined Destination 22 Call Routing While No Other Calls are Connected 22 Understanding VPNs and PPTP 23 Setting Up the Server Side of the Tunnel 24 Setting Up the Client Side of the Tunnel 24 For Windows Dial-Up Networking Users 24 Establishing a Tunnel via the LAN Modem 24 3 HARDWARE DESCRIPTION AND INSTALLATION Package Contents 27 Before You Install
56K LAN Modem Main Page 54 Links From the Illustration 54 Links from the Buttons 55 6 ADVANCED CONFIGURATION Advanced Configuration 57 Setting Up Additional Service Providers 57 ISP Versus Private Network 58 When to Select ISP 58 When to Select Private Network 58 Setting Up a Connection to an ISP 58 Before You Begin 58 Setting Up a Connection to the Internet 59 Setting Up a Connection to a Private Network 62 Before You Begin 62 Setting Up a Connection to a Remote LAN 62 Associating Service Providers with
Configuring the LAN Modem Remotely via an Analog Modem 7 PLACING, RECEIVING AND DISCONNECTING CALLS Placing Calls 77 Placing a Call Automatically 77 Call Routing Among Service Providers 77 Placing a Call Manually 78 Placing a Call Manually to a Temporary Service Provider Receiving Calls 79 Receiving Voice Calls 79 Receiving Data Calls 79 Auto Answer 79 Disconnecting Calls 80 Disconnecting Calls Manually 80 Disconnecting Calls Automatically Using Timers 80 Minimum Call Duration 80 Idle Timeout 80 Using a C
A NETWORKING PRIMER B USING THE CUSTOM WEB BROWSER C FACTORY DEFAULTS D SPECIFICATIONS General Specifications Year 2000 Compliance 105 105 GLOSSARY 3COM CORPORATION LIMITED WARRANTY FCC CLASS B STATEMENT FCC DECLARATION OF CONFORMITY
ABOUT THIS GUIDE About This Guide provides an overview of this guide, describes guide conventions, and tells you where to look for specific information. Introduction Audience Description How to Use This Guide Conventions This guide describes how to install and configure the 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. This table shows where to find specific information in this guide.
ABOUT THIS GUIDE 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: To remove the IP address, enter the following command: SETDefault!0 -IP NETaddr = 0.0.0.0 NOTE: This guide always gives the full form of a command in uppercase and lowercase letters. However, you can abbreviate commands by entering only the uppercase letters and the appropriate value.
INTRODUCTION 1 This chapter provides an overview of the OfficeConnect® 56K LAN Modem, referred to throughout this document as the 56K LAN Modem or simply as the LAN Modem. Introduction The 56K LAN Modem is an easy to install, Local Area Network (LAN) to Wide Area Network (WAN) personal analog IP router. The LAN Modem provides four built-in 10BASE-T Ethernet connections for the LAN, while utilizing the V.90 ITU 56K standard for WAN access.
CHAPTER 1: INTRODUCTION Local Networking with Access to the Internet Users can share access to the Internet while continuing to network locally, as shown in Figure 1.
Features Features 15 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 High Performance ■ Internal 56K modem, capable of transmitting at speeds up to 33.6 Kbps and downloading at speeds up to 56 Kbps1 (without compression) ■ V.42/MNP 2-4 error control and V.
CHAPTER 1: INTRODUCTION Protocols ■ IETF PPP (RFC 1661, 1662, 1663) ■ IETF Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) security (RFC 1994) ■ MS-CHAP support (as defined in Network Working Group Information Memo: Microsoft PPP CHAP Extensions. S. Cob, Rev. 1.3 March 1997 including only the functionality that keeps with IETF 1994).
Features 17 Warranty ■ 3Com Corporation Limited Warranty (refer to the end of this User Guide for details) Support for Internet Applications Your 56K LAN Modem supports applications that use the User Datagram Protocol (UDP) and the Transmission Control Protocol (TCP). This protocol is used primarily by Internet games. Look for the latest list of Internet applications and games that interoperate with the LAN Modem at http://www.remoteaccess.3com.com/support/docs/lanmodem/ welcome.
CHAPTER 1: INTRODUCTION
2 56K LAN MODEM FUNCTIONALITY DESCRIPTION This chapter provides a description of the 56K LAN Modem’s key functionality, covering the following topics. Connection Types 56K Technology ■ Connection Types ■ Call Routing Protocol and IP Address Translation ■ Understanding PPTP This section discusses LAN side and WAN side connections. Your 56K LAN Modem utilizes the V.90 56K ITU standard, which is backward compatible with all US Robotics 56K standards, and is capable of download speeds of up to 56K1.
CHAPTER 2: 56K LAN MODEM FUNCTIONALITY DESCRIPTION 10 Mbps Ethernet LAN OfficeConnect Hub 8 TPO Port Status Alert LAN STATUS Alert PWR AA CD RD SD OH Tx Coll 1 2 3 4 OfficeConnect® 56K LAN Modem PWR PKTCOLL Network Utilization 1 2 3 4 5 6 7 8 COAX 1% 2% 3% 6% 12% 25% 50% 80% green = link OK, off = link fail, yellow = partition Office Connect¨ Hub 3 Com 3 Com OfficeConnect 56KLAN Modem Figure 3 56K LAN Modem Ten Workstation Connection Example An example of the minimum number of conne
Connection Types WAN Connection One High Speed Connection 21 The 56K LAN Modem allows up to 25 users to connect to a WAN using one analog connection to a single location. The WAN connection may be utilized by a single user to connect to a remote site such as a corporate LAN, as shown in Figure 5.
CHAPTER 2: 56K LAN MODEM FUNCTIONALITY DESCRIPTION Call Routing Protocol and IP Address Translation Placing a Call to a Previously Defined Destination This section describes the call routing protocol used by the 56K LAN Modem and explains how IP addresses are translated.
Understanding VPNs and PPTP 19 Jack’s PC 192.168.1.2 2. Translates PC IP addresses to IP address assigned by ISP 16 8. 1. 2 IP address assigned by ISP 198.6.1.1 Chrissy’s PC 192.168.1.3 LAN STATUS Alert RD SD OH Tx Coll 1 2 3 Com 3 4 3C886 56K LAN Modem Internet/Intranet or online service 1 . .1 1.1 6 . . 8 1 19 98.6 6.1. 1 8. 19 Public telephone network Analog POTS line OfficeConnect 56K LAN Modem 192.168.1.1 4 1. 8. 16 2. Analog POTS line 2.1 68 .1.
CHAPTER 2: 56K LAN MODEM FUNCTIONALITY DESCRIPTION The main steps for creating a VPN are as follows. Each step is explained in detail in subsequent sections.
Understanding VPNs and PPTP 25 You are ready to access a remote private network LAN as if you were connected locally. Each workstation that wishes to have access to the remote private LAN will need to create its own tunnel. Refer to http://www.remoteaccess.3com.com/support/docs/lanmodem for more information. For specific instructions on how to configure a VPN adapter in Windows 98, 95 or Windows NT, refer to Microsoft’s Web site at http://www.microsoft.com. and then enter PPTP in the search field.
CHAPTER 2: 56K LAN MODEM FUNCTIONALITY DESCRIPTION
3 HARDWARE DESCRIPTION AND INSTALLATION This chapter provides an overview of the hardware description and installation of the 56K LAN Modem.
CHAPTER 3: HARDWARE DESCRIPTION AND INSTALLATION ■ TCP/IP software. TCP/IP is provided as part of the Windows 98, 95, NT and Macintosh System 7.6 and later operating systems. For Windows 3.11 users, TCP/IP software is provided on the 3Com Companion Programs CD-ROM. Available storage space on your computer’s hard drive is not required because nothing is installed onto your computer as part of the 56K LAN Modem setup procedure.
Installing the 56K LAN Modem 29 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 3: HARDWARE DESCRIPTION AND INSTALLATION Installing the Analog Cable ■ 10BASE-T Ethernet cable (8-pin to 8-pin connectors) labeled Ethernet which was provided in the package. It is recommended that you use the cable provided. However, if you choose to use another cable it must be a straight-through 10BASE-T Ethernet cable. A crossover cable may not be used to connect the LAN Modem to a workstation. ■ Power adapter (you must use the power adapter provided in the package).
Installing the 56K LAN Modem Connecting to Another Ethernet Hub 31 You can connect to another Ethernet hub to allow up to 25 users to access the WAN. Instructions for adding another Ethernet hub to allow 10 users, a more common scenario, is as follows. Before You Begin In addition to an external 10BASE-T Ethernet hub, you will need a 10BASE-T Ethernet cable, which may have been provided with the additional hub.
CHAPTER 3: HARDWARE DESCRIPTION AND INSTALLATION Installing Analog Equipment You can connect an analog touch-tone telephone, answering machine, fax machine, or external analog modem to the 56K LAN Modem’s pass-through Phone port. You will need an RJ-11 to RJ-11 cable that came with the analog device for your analog phone port connection. To install an analog device: 1 Insert one end of an RJ-11 cable into the port labeled Phone on the back of the 56K LAN Modem, as shown in Figure 14.
Installing the Power Cable 33 2 Plug the other end of the power module into a surge-protected standard 110 VAC wall outlet. The PWR and AA indicator LEDs illuminate. The ALERT LED flashes momentarily as the unit undergoes a power-up self-test diagnostic. Once completed, only the PWR LED and LAN port LED remain lit. This completes the 56K LAN Modem installation. If you do not have TCP/IP installed and set up on your computer, refer to Chapter 4, “Setting Up TCP/IP for Windows and Macintosh.
CHAPTER 3: HARDWARE DESCRIPTION AND INSTALLATION
4 SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH This chapter describes how to set up the Windows and Macintosh operating system (OS) TCP/IP stack. Your computer must have a TCP/IP stack in order to use the 56K LAN Modem. If you already have TCP/IP installed and set up on your computer, then go on to Chapter 5. These instructions vary depending upon your particular operating system. Refer to the appropriate section.
CHAPTER 4: SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH Figure 17 Select Network Component Type Dialog Box 3 Select Protocol and then click Add. 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. 6 From the Network Configuration list box, select TCP/IP and then click Properties.
TCP/IP Setup Using Windows 95 and 98 37 Figure 19 Network Dialog Box 7 Select IP Address. The IP Address dialog box appears. Figure 20 IP Address Dialog Box 8 Most users should select Obtain an IP Address automatically as most LANs utilize dynamic IP addresses. If this LAN uses static IP addressing, enter the IP address and subnet mask. (You can obtain this information from your system administrator or ISP.) 9 Select the Advanced tab. The TCP/IP Properties Advanced screen opens.
CHAPTER 4: SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH Figure 21 TCP/IP Properties Advanced Screen 10 Check the box to set TCP/IP as the default protocol. 11 Click OK to close the TCP/IP Properties dialog box. 12 Click OK to close the Network dialog box. 13 Restart Windows 98 or 95 to let these changes take effect. TCP/IP Setup Using Windows NT 4.0 Windows NT 4.0 provides TCP/IP as part of its standard operating system. If you have not already set up TCP/IP, do the following.
TCP/IP Setup Using Windows NT 4.0 Figure 22 Windows NT Protocols Configuration Window 3 Click Add. The Select Network Protocol window appears as shown in Figure 23. Figure 23 Select Network Protocol Window 4 Select TCP/IP Protocol and then click OK. The following message appears. Figure 24 DHCP Message Box 5 Select the appropriate response for your network.
CHAPTER 4: SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH If you are using dynamic IP addressing on your LAN and would like your LAN Modem to act as your DHCP server, select Yes. Note that you must select Yes if there is no other DHCP server on your LAN. 6 You are then prompted to insert your installation CD-ROM. Insert the Windows NT 4.0 CD ROM and then click Continue.
TCP/IP Setup Using Mac OS 7.6 or later 41 Figure 26 Microsoft TCP/IP Properties Window 9 From the Adapter drop down list box, select the Ethernet card that is connected to the 56K LAN Modem. 10 If this LAN uses dynamic IP addresses, select Obtain an IP Address automatically. 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. TCP/IP Setup Using Mac OS 7.
CHAPTER 4: SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH Figure 27 TCP/IP Dialog Box for Macintosh Computers 2 Select Ethernet from the Connect via drop down list box. 3 Most users should select Using DHCP Server from the Configure drop-down list box, as most LANs utilize dynamic IP addressing. If this LAN uses static IP addressing, select Manually and then enter the IP address. TCP/IP Setup Using Windows 3.11 Setting up TCP/IP using MS_TCP If you are using Windows 3.
TCP/IP Setup Using Windows 3.11 Figure 29 Network Group Box 4 From the Network Setup dialog box, click the Drivers button. Figure 30 Network Setup Dialog Box 5 From the Network Drivers dialog box, click Add Protocol. 6 Select Unlisted or Update Protocol and then click OK. 7 From the Install Driver dialog box, enter the path to the MS _TCP directory. For example, if you installed MS_TCP on your C: drive in a directory called MS_TCP, you would enter C:\MS_TCP. 8 Select MS TCP/IP-32.
CHAPTER 4: SETTING UP TCP/IP FOR WINDOWS AND MACINTOSH
5 CONFIGURING THE 56K LAN MODEM This chapter describes the typical configuration procedure for your 56K LAN Modem. These steps include setting up your 56K LAN Modem and connecting to the Internet. If you have already followed the instructions provided in your Getting Started Guide, then you have already set up the typical configuration. Go to Chapter 6, “Advanced Configuration” to learn about additional configuration changes you might like to make.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM You Should Have This Information Determine Whether You Use Dynamic or Static IP Addresses If you want to set up a connection to an ISP, you will need: ■ Your ISP’s telephone access number. ■ Your user name, password and DNS address (if your service provider requires a specific DNS address). Your setup procedure varies depending upon whether you are using a dynamic or a static IP address.
Typical Configuration Setting Up Your Computer If You Have a Static IP Address 47 If your computer has a static IP address, you must verify and possibly change some settings on your computer before you begin the LAN Modem configuration procedure. The 56K LAN Modem must be your gateway to get outside of your LAN as well as one of your DNS servers. Follow the procedure in the appropriate section to make sure that this is the case.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM 8 In the TCP/IP DNS Server box, enter the Gateway IP address you wrote down as part of the previous step and then click Add. 9 Click OK to close the Microsoft TCP/IP Properties dialog box. 10 Click OK to close the Network Control Panel box. You are asked to restart your computer. 11 Click OK. For Macintosh Users 1 From the Apple menu, open Control Panels. Double-click TCP/IP. 2 Choose Ethernet from the Connect Via pop-up menu, if it is not already chosen.
Typical Configuration Configuring the 56K LAN Modem for the Typical Configuration 49 The following steps allow you to configure the 56K LAN Modem for the typical configuration. You may need the IP address which you recorded previously in the “Setting Up Your Computer If You Have a Static IP Address”section. 1 Launch your Web browser. The LAN Modem attempts to use its default IP address (192.168.1.1) to communicate with the attached computer.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM Figure 33 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 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 ISP Wizard appears. If you do not want to use the ISP Wizard, click Abort to reach the 56K LAN Modem main configuration page.
Typical Configuration 51 Figure 34 ISP Wizard Window 5 In the ISP Name field, enter a name that you wish to associate with your ISP. 6 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. 7 In the Call Waiting Disable Command field, enter the appropriate command to disable call waiting. Your telephone company should provide this value.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM If you cannot access a Web site and your computer has a static IP address, refer to “Configuring a Static IP Address on the 56K LAN Modem”. If you experience any other problems, refer to Chapter 7, “Placing, Receiving and Disconnecting Calls”. You will be connected to the LAN Modem Web site. This verifies the correct configuration of your ISP connection.
Typical Configuration 53 6 Enter your password and then click Submit. The 56K LAN Modem’s main configuration page appears. 7 Click the ISP Wizard button. You will see the information you entered previously. 8 Click Continue. A call is launched to your ISP. A congratulations message appears when you successfully connect to your ISP. This configuration covers the typical parameters needed to connect to your ISP.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM 56K LAN Modem Main Page The 56K LAN Modem main page is shown in Figure 35. From here you can access configuration parameters as well as place and disconnect manual calls. Bookmark this page for easy access. Alternatively, if you are using the 56K LAN Modem Web browser, click Configure Modem from the Links menu bar to go directly to your LAN Modem’s main page.
56K LAN Modem Main Page Links from the Buttons 55 ■ Current Call Status: Jumps to the call statistics page where the latest call information is displayed. ■ Home: Jumps to this main configuration page of the 56K LAN Modem. ■ ISP Wizard: Allows you to configure an ISP profile. Note that if you have already configured an ISP using the ISP Wizard, invoking the ISP Wizard again will create a new profile and overwrite any previous settings.
CHAPTER 5: CONFIGURING THE 56K LAN MODEM
6 ADVANCED CONFIGURATION This chapter describes the advanced configuration steps required for connecting to private networks such as a remote office LAN, and also provides instructions for changing your 56K LAN Modem’s default settings. You should have first followed the typical configuration steps as detailed in the previous chapter before attempting to configure advanced parameters. The configuration windows shown in this chapter may differ slightly from what is displayed on your computer.
CHAPTER 6: ADVANCED CONFIGURATION your LAN; in other words, all (up to 25) computers on the LAN have access to and may connect to that ISP and therefore the Internet. You may wish to review the profile for this ISP connection to determine if you would like to make any changes. For instructions, refer to “Editing Service Provider Profiles.” ISP Versus Private Network There are two types of service providers you may configure on your LAN Modem, an ISP and a Private Network.
Setting Up Additional Service Providers 59 Setting Up a Connection to the Internet To set up a connection to an ISP, do the following. 1 From the 56K LAN Modem main page, click the Service Providers image. Figure 36 ISP Service Provider Selection Window 2 Select New (Internet Service Provider) from the drop down list box and then click Select. The Internet Service Provider Parameters window appears.
CHAPTER 6: ADVANCED CONFIGURATION Figure 37 ISP Parameters Window 3 In the Name field, enter a name for this remote destination, such as the name of your ISP. If you have more than one account with this particular ISP, you may wish to enter a more descriptive name. 4 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 switch. If not required, leave this field blank.
Setting Up Additional Service Providers 61 9 For DNS IP Address(es), enter the primary DNS address of your ISP in the Primary field, if required (that is, your ISP does not automatically supply these addresses upon establishing a connection). If there is a secondary address, enter it in the Secondary field. 10 Under Miscellaneous, indicate whether or not you would like to use compression when transferring data by selecting the appropriate radio button.
CHAPTER 6: ADVANCED CONFIGURATION Setting Up a Connection to a Private Network This section describes your 56K LAN Modem setup procedures for accessing a private network, such as a remote office or corporate LAN.
Setting Up Additional Service Providers 63 Figure 39 Private Network Parameters Window 3 In the Name field, enter a name for this remote destination, such as the location of the remote office. You may wish to use a more descriptive name if you have more than one account with this private network. 4 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.
CHAPTER 6: ADVANCED CONFIGURATION 6 In the Telephone Number 1 field, enter the telephone number you must dial in order to reach your ISP. 7 In the Telephone Number 2 field, enter an alternate number to dial your ISP, to be used if the first number is unavailable. 8 Under Security, enter your user ID and password (these may be case sensitive).
Associating Service Providers with Computers on the LAN 65 18 Advanced users can review or make changes to the modem settings associated with this service provider by clicking the Modem Settings button. To leave these values set to their defaults, click Submit. To change these settings, refer to “Configuring Modem Control Parameters”. If your service provider requires that you create a connection script, refer to Chapter 7, “Using a Connection Script” for assistance.
CHAPTER 6: ADVANCED CONFIGURATION To change the associations of this particular workstation, do the following. 1 Check or clear the boxes of the service providers you would like to associate or disassociate. 2 Click Submit. If you wish to password protect the configuration profile of the 56K LAN Modem, refer to “Locking and Unlocking the Configuration.” Editing Service Provider Profiles The following steps allow you to edit a previously configured service provider connection.
Configuring LAN Parameters Configuring LAN Parameters Understanding LAN Parameters 67 This section describes how to configure the parameters of your LAN. (LAN refers to that section of the network comprising your 56K LAN Modem and all of the computers or devices attached to it by means of Ethernet cabling.) This section describes the LAN parameters and then provides steps for their configuration. The LAN (Ethernet) Parameters window, shown in Figure 40, contains the following fields.
CHAPTER 6: ADVANCED CONFIGURATION WARNING: If you change the IP address and/or the subnet mask, the 56K LAN Modem will re-initialize itself to work with the new settings. All calls will be terminated and you may need to reconfigure the IP address(es) of the computer(s) connected to your 56K LAN Modem. For a LAN using static IP addresses, you must manually reconfigure the PC’s IP addresses via the PC Parameters window. For a LAN using dynamic IP addresses, if you have Windows 95 or 98, launch Winipcfg.
Configuring Modem Control Parameters 69 If you wish to password protect the configuration profile of the 56K LAN Modem, refer to “Locking and Unlocking the Configuration.” Configuring Modem Control Parameters Understanding Modem Controls Most users will be able to safely leave the modem control parameters set to their default values. However, advanced users may wish to further define the manner in which the LAN Modem operates.
CHAPTER 6: ADVANCED CONFIGURATION Changing Modem Controls To access and make changes to the Modem Control parameters, do the following. 1 Click the Service Providers icon from the LAN Modem’s main page. 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 Changing Data Call Parameters 71 This section describes changing the data call parameter default settings. The data call parameters consist of timeout values for both automatic calls and manual calls. The timeout values are a useful means of controlling bandwidth efficiently while keeping telephone usage and Internet access costs down. If there is no network activity on a call for a specified amount of time, then that call is automatically disconnected.
CHAPTER 6: ADVANCED CONFIGURATION simultaneously with the minimum call duration. For example, if the minimum call duration is set to two minutes, and the inactivity timer is set to 30 seconds, the call will be connected for at least two minutes even if there has been no activity for 30 seconds or more. To prevent a data call from being disconnected due to inactivity, enter 0 (note that you must then manually disconnect the call via the Manual Calling screen). The default is seven minutes.
Changing Your Password 73 To set up selective password protection, do the following. 1 From the LAN Modem main page, click the Password button. 2 Check the box labeled Disable password protection for Manual Calling screen. 3 Click Submit. All workstations are now able to access the Manual calling screen by clicking the Manual Calling button from the main configuration screen.
CHAPTER 6: ADVANCED CONFIGURATION Configuring the LAN Modem from a Remote Location Configuring the LAN Modem Remotely via Another LAN Modem This section provides instructions for accessing and making configuration changes to your LAN Modem remotely using either another LAN Modem or an analog modem. In addition you will need a Web browser, and any PPP dialer software, such as Windows 98/95’s Dial-Up Networking, installed on your local computer.
Configuring the LAN Modem from a Remote Location 75 For Windows 95 users: PPP, Windows 95, Windows NT 3.5, Internet should be chosen in the Type of Dial-Up Server list box. For Windows 98 users: PPP, Internet, Windows NT Server, Windows 98, should be chosen in the Type of Dial-Up Server list box. 9 Under Advanced Options, uncheck all boxes. 10 Choose the TCP/IP check box for Allowed Network Protocols. Uncheck the boxes for NetBEUI and IPX/SPX Compatible. 11 Click TCP/IP Settings.
CHAPTER 6: ADVANCED CONFIGURATION
PLACING, RECEIVING AND DISCONNECTING CALLS 7 This chapter covers the following main topics: Placing Calls ■ Placing calls ■ Receiving calls ■ Disconnecting calls ■ Using a connection script Your 56K LAN Modem allows you to place calls to a remote location in one of two ways: either automatically via a pre-defined service provider, or manually by entering the telephone number of the destination on a call-by-call basis.
CHAPTER 7: PLACING, RECEIVING AND DISCONNECTING CALLS Placing a Call Manually You can also choose to manually place a call to either an existing service provider or to a destination that has not been defined. To place a call manually to an existing service provider (that is, one that is already configured), do the following. 1 From the 56K LAN Modem home page, click the Manual Calling button. The Manual Call Control window appears.
Receiving Calls Receiving Calls 79 The 56K LAN Modem can receive both voice and data calls, as follows. Receiving Voice Calls Voice calls received by the 56K LAN Modem will be routed to any analog equipment connected to the Phone port, by default, assuming that a data call is not currently connected. For assistance with installing an external analog device, refer to chapter 3, “Installing Analog Equipment”.
CHAPTER 7: PLACING, RECEIVING AND DISCONNECTING CALLS Disconnecting Calls Disconnecting Calls Manually You can disconnect calls manually or utilize timers to disconnect calls automatically. To disconnect calls manually, do the following: 1 From the 56K LAN Modem home page, click Manual Calling. The Manual Call Control window appears. 2 In the table, locate the name of the service provider from which you wish to disconnect and then verify that the call is active under the Status of Call column.
Using a Connection Script Accessing the Script Configuration Page 81 You can associate a unique connection script for each of your four service provider profiles. You enter the script via the LAN Modem’s Script Configuration page. To access the Script Configuration page, do the following. 1 From the LAN Modem main page, click the Service Providers icon. The Service Provider Selection page opens.
CHAPTER 7: PLACING, RECEIVING AND DISCONNECTING CALLS Creating a Connection Script You can choose to manually create a script from within a 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 83 6 Enter the Parity setting required by your service provider. Enter e if the remote server requires Even parity, o if the remote server requires Odd parity, or n if the remote server requires that parity be set to None. Click OK when finished. The Stop Bits dialog box opens. 7 Enter 1 to set the stop bits to one, or enter 2 to set the stop bits to two, and then click OK. Note the results in the script window.
CHAPTER 7: PLACING, RECEIVING AND DISCONNECTING CALLS Once completed, your script will be automatically invoked each time you launch a call to your service provider. Additional Configuration Buttons The Script Configuration page provides the following configuration buttons, located along the bottom of the script text entry window. ■ The Submit button saves your script and returns to the Service Provider Parameters page. ■ The Reset button restores the last saved version of your connection script.
8 TROUBLESHOOTING AND MAINTENANCE This chapter explains how to isolate and solve problems encountered with the 56K LAN Modem. Problems may stem from incorrect option settings or improper installation. This chapter covers the following main topics.
CHAPTER 8: TROUBLESHOOTING AND MAINTENANCE ■ Monitoring the LAN Port Status LEDs A fast flash of the ALERT LED indicates that the DHCP server has issued all of the available IP addresses, and is unable to fulfill a request for a new IP address. Refer to “ALERT LED continues to flash” for more information. Observe the LAN port status LED labeled 1, 2, 3, or 4, depending on the port number to which your computer is attached.
Evaluating Symptoms and Solutions Table 8 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Your Web browser may be configured to use a proxy server. Set your browser to use the LAN Modem. For internet Explorer: 1 From within Explorer, choose View and Internet Options . 2 Select the Connection tab. 3 Under the Proxy Server header, uncheck the box labeled Accessing the Internet using a proxy server. For Netscape: 1 From within Netscape, choose Edit and select Preferences.
CHAPTER 8: TROUBLESHOOTING AND MAINTENANCE Table 8 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Sending SMTP mail is slow. Only one workstation to one server is supported at one time for SMTP mail. If more than one workstation starts an SMTP mail session to the same remote server at the same time, the mail transfer rate for each additional workstation will be slowed.
Evaluating Symptoms and Solutions Table 8 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Calls continue to reconnect or calls do not timeout and disconnect. An application or LAN device is sending IP packets. Enable NetBIOS filtering. To do so, access the LAN Parameters screen and click the box to enable NetBIOS filtering. When this box is checked, NetBIOS packets are prevented from initiating an outgoing call, but they will be passed if the call is already established.
CHAPTER 8: TROUBLESHOOTING AND MAINTENANCE Finding More Information For more information about the 56K LAN Modem, such as frequently asked questions and specific technical notes, go to the following URL, http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html nd then bookmark this site for quick and easy access. If you are using the 56K LAN Modem custom browser, click Updates from the menu bar.
Reviewing Statistics Reviewing Statistics 91 Various statistics about LAN and WAN parameters are stored and available for review. To view statistics, do the following. 1 From the 56K LAN Modem’s home page, select Statistics. 2 Select the type of statistics you would like to review. You can view the following types of statistics. ■ System ■ Current Call ■ Last Call ■ Service Provider Refer to the appropriate section for a list and description of the information provided.
CHAPTER 8: TROUBLESHOOTING AND MAINTENANCE Table 10 Current Call Information Description (continued) Current Call Information Description Secondary DNS address Indicates the secondary DNS address of the service provider to which the current call is connected. This field will be empty if a secondary DNS address is not needed. Data call options If the current call is a data call, indicates the type of data call (i.e.
Reviewing Statistics 93 Table 11 Last Call Information Description Last Call Information Description Reason for call coming up Indicates how the call was placed and which workstation placed the call. Depending on how the call placed you should see something similar to the following: “Manual Dial by Workstation A.” “DNS query from Workstation A for http://www.xxx.com.” “Packet from Workstation A to IP address xxxx.
CHAPTER 8: 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 56K LAN Modem. What is a network? What is a LAN? A network is a set of computers and other devices such as printers, modems, and scanners that are connected together either directly via physical cables or indirectly via dial-up telephone services.
APPENDIX A: NETWORKING PRIMER How does a LAN connect to a WAN? You can connect a LAN to a WAN via a number of devices such as a router or a bridge that can place a call to the remote LAN using an analog telephone line. Routers and bridges are devices that link networks. A bridge sends every bit of information across the WAN while a router is considered a more sophisticated device because of its ability to route only the desired bits of information across the WAN.
What is a network? 97 as Class C. The next 21 bits identify the network and the last 8 represent the local or host address, limiting the number of devices to 256. In contrast, a Class A network allocates 24 bits for local addresses, allowing for many more devices. IP addresses are composed of four sets of eight bits usually separated by a period (for example, 192.168.1.1).
APPENDIX A: NETWORKING PRIMER What is NAT? Network Address Translation, also known as IP address sharing, allows multiple users to share a single connection, such as an Internet connection. For example, with the 56K LAN Modem, when any user on the LAN launches a Web browser for Internet access, their computer’s IP address is translated into the IP address provided by the ISP for access. This allows multiple users on your LAN to appear as one connection to your ISP.
What is a network? 99 Note that employing data compression upon pre-compressed files, such as a ZIP archive, may actually increase the time required for file transmission. As such, V.42bis is preferable in these circumstances, as it is capable of recognizing pre-compressed files and withholding additional, unnecessary compression. How does 56K technology work? The V.90 56K ITU standard allows modems to receive data at up to 56 Kbps over the standard, public switched telephone network (PSTN). V.
APPENDIX A: NETWORKING PRIMER
B USING THE CUSTOM WEB BROWSER An Internet Explorer Web browser tailored for use with your 56K LAN Modem is provided on the 3Com Companion Programs CD-ROM. You may prefer to use this browser as it has been customized for your 56K LAN Modem, as shown in Figure 47, making it easier to use. If you use a different Web browser, make sure that it supports frames. (Netscape 3.0 and later and Internet Explorer 3.0 and later both support frames.
APPENDIX B: USING THE CUSTOM WEB BROWSER ■ User Guide Click here to jump to the Internet location of the OfficeConnect 56K LAN Modem User Guide. Using Favorites Under the Favorites menu, a subcategory labeled 3Com sites lists several helpful sites already bookmarked for you. These include: ■ 3Com Corporate This takes you to the 3Com Corporate Web site. ■ 3Com Remote Access This takes you to the 3Com Remote Access Web site. ■ 3Com Shopping This takes you the 3Com Shopping Network.
C FACTORY DEFAULTS This appendix lists the factory default settings of the 56K LAN Modem. 56K LAN Modem Factory Defaults Refer to Table 13 for the 56K LAN Modem factory defaults. Table 13 56K LAN Modem Factory Defaults LAN Parameters LAN Modem IP Address * 192.168.1.1 Subnet Mask 255.255.255.
APPENDIX C: FACTORY DEFAULTS
D SPECIFICATIONS This appendix describes the following specifications of the 56K LAN Modem. General Specifications ■ General ■ Year 2000 Compliance Refer to Table 14 for the 56K LAN Modem specifications. Table 14 56K LAN Modem Specifications Network Interface Analog (POTS) telephone service provided by the telephone company Network (analog) Connector RJ-11 LAN Interface Ethernet IEEE 802.3 10BASE-T standard Physical Dimensions Length 8.66 in (22.0 cm) Width 5.44 in (13.8 cm) Height 1.
APPENDIX D: SPECIFICATIONS
GLOSSARY analog signals baud rate bit rate A variety of signals and wavelengths that can be transmitted over communications lines. An example is a voice call over the phone line. A term used to measure the speed of an analog transmission from one point to another. Although not technically accurate, baud rate is commonly used synonymously with bit rate. Also referred to as transmission rate. The number of binary digits (or bits) transmitted per second (bps).
GLOSSARY ITU International Telecommunications Union. Headquartered in Geneva, Switzerland the ITU is an international organization within which governments and the private sector coordinate global telecom networks and services. IP address An IP address is a set of numbers that uniquely identifies each device in a network. ISP Kbps MS-CHAP modem Internet Service Provider. A business that supplies access to the Internet such as your telephone company or AOL. Kilobits per second.
GLOSSARY V.34+ 109 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.
GLOSSARY
Macintosh 86 Windows 95 86 Windows NT 86 A Alert LED 85, 88 analog cable installation 30 analog equipment installation 32 Auto Answer 79 ISP versus Private Network L B back panel description 29 C CD LED 88 Challenge Handshake Authentication Protocol (CHAP) 16 changing data call parameters 71 your password 72, 73 configuration advanced 57 data call parameters 72 from a remote location 74 LAN parameters 67 Modem Controls 69 Mode parameters 69 static IP address 52 typical 45, 49 connecting 10BASE-T E
3Com Corporation LIMITED WARRANTY OfficeConnect 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 defective product or p
WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION.
■ Consult the dealer or an experienced radio/TV technician for help. The user may find the following booklet prepared by the Federal Communications Commission helpful: The Interference Handbook This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402. Stock No. 004-000-00345-4. NOTE: In order to maintain compliance with the limits of a Class B digital device, 3Com requires that you use quality interface cables when connecting to this device.
