3Com OfficeConnect 3C8861 User Manual
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3Com OfficeConnect 3C8861 User Manual

56k lan modem
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Part No. 984/000027-2
Published March 1999
OfficeConnect
56K LAN Modem
3C886

User Guide

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Summary of Contents for 3Com OfficeConnect 3C8861

  • Page 1: User Guide

    OfficeConnect 56K LAN Modem ® 3C886 User Guide http://www.3com.com/ Part No. 984/000027-2 Published March 1999 ®...
  • Page 2 95052-8145 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change. 3Com Corporation provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

  • Page 3: Important Safety Information

    If any of the following conditions occur, isolate the electricity supply and refer to your 3Com reseller.
  • Page 4 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.

  • Page 5: Table Of Contents

    ABLE OF ONTENTS MPORTANT AFETY NFORMATION Additional Safety Information BOUT UIDE Introduction How to Use This Guide Conventions Year 2000 Compliance NTRODUCTION Introduction 56K Access Applications Local Networking with Access to the Internet Local Networking with Access to a Remote Office Features Ease of Installation and Use High Performance...
  • Page 6 WAN Connection One High Speed Connection Sharing the Connection Call Routing Protocol and IP Address Translation Placing a Call to a Previously Defined Destination Call Routing While No Other Calls are Connected Understanding VPNs and PPTP Setting Up the Server Side of the Tunnel Setting Up the Client Side of the Tunnel For Windows Dial-Up Networking Users Establishing a Tunnel via the LAN Modem...
  • Page 7 56K LAN Modem Main Page Links From the Illustration Links from the Buttons DVANCED ONFIGURATION Advanced Configuration Setting Up Additional Service Providers ISP Versus Private Network When to Select ISP When to Select Private Network Setting Up a Connection to an ISP Before You Begin Setting Up a Connection to the Internet Setting Up a Connection to a Private Network...
  • Page 8 Configuring the LAN Modem Remotely via an Analog Modem LACING ECEIVING AND Placing Calls Placing a Call Automatically Call Routing Among Service Providers Placing a Call Manually Placing a Call Manually to a Temporary Service Provider Receiving Calls Receiving Voice Calls Receiving Data Calls Auto Answer Disconnecting Calls...

  • Page 9: Fcc Declaration Of Conformity

    ETWORKING RIMER SING THE USTOM ACTORY EFAULTS PECIFICATIONS General Specifications Year 2000 Compliance LOSSARY ORPORATION FCC C LASS TATEMENT FCC D ECLARATION OF ROWSER IMITED ARRANTY ONFORMITY...

  • Page 11: 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 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.

  • Page 12: Year 2000 Compliance

    The OfficeConnect LAN Modem is Year 2000 compliant. Specifically, its system clock is capable of accepting and storing dates including and beyond the year 2000. For information on Year 2000 compliance and 3Com products, visit the 3Com Year 2000 web page: Description The word “command”...

  • Page 13: Introduction

    Now, the V.90 56K ITU standard provides download speeds of up to 56K. upgrades to new features and enhancements as they become available. For further information, visit 3Com’s 56K web site at Applications The primary applications for the 56K LAN Modem are:...

  • Page 14: Local Networking With Access To The Internet

    1: I HAPTER NTRODUCTION Local Networking with Users can share access to the Internet while continuing to network locally, as Access to the Internet shown in Figure 1. Figure 1 Local Networking with Internet Access Local Networking with Users can share access to a remote office LAN while continuing to network locally, Access to a Remote as shown in Figure 2.

  • Page 15: Features

    Domain Name Service (DNS) server functionality for the LAN, which translates the common, alphanumeric name of a device (for example, “www.3com.com”) to its numeric IP address Network Address Translation (NAT) between LAN and WAN, which allows multiple users on the LAN to share a single remote connection Multiplexing traffic from several computers to the same remote destination...

  • Page 16: Protocols

    ITU-T V.22 ITU-T V.23 Bell 212A ITU-T V.21 Bell 103 Security PAP CHAP and MS-CHAP support Upgradability Flash memory for field firmware updates Firmware posted on 3Com’s Web site Fully upgradable to future 56K standards Diagnostics LED status display Statistics display...

  • Page 17: Warranty

    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.
  • Page 18 1: I HAPTER NTRODUCTION...

  • Page 19: Lan Modem Functionality Description

    Understanding PPTP . V.90 technology takes advantage of the typical network http://www.3com.com/56k 1.Capable of receiving at up to 56 Kbps and sending at up to 33.6 Kbps. Due to FCC regulations, re- ceiving speeds limited to 53 Kbps. Actual speeds may vary. Requires compatible phone line and server equipment.

  • Page 20: Application Sharing Over The Lan

    2: 56K LAN M HAPTER ODEM UNCTIONALITY Figure 3 56K LAN Modem Ten Workstation Connection Example An example of the minimum number of connections is shown in Figure 4. Figure 4 56K LAN Modem Minimum Connection Example Application Sharing over the LAN Most operating systems such as Windows 95, 98 and MacOS provide the capability for LAN users to share applications, files and printers between computers.

  • Page 21: Wan Connection

    WAN Connection The 56K LAN Modem allows up to 25 users to connect to a WAN using one analog connection to a single location. One High Speed The WAN connection may be utilized by a single user to connect to a remote site Connection such as a corporate LAN, as shown in Figure 5.

  • Page 22: Call Routing Protocol And Ip Address Translation

    2: 56K LAN M HAPTER ODEM Call Routing Protocol This section describes the call routing protocol used by the 56K LAN Modem and and IP Address explains how IP addresses are translated. Translation Placing a Call to a The 56K LAN Modem distinguishes between three types of destinations: Previously Defined Destination If all of these connection types are configured on the 56K LAN Modem and are...

  • Page 23: Understanding Vpns And Pptp

    Figure 7 IP Address Translation Understanding VPNs Virtual private networks (VPN) are private, secure networks created in public and PPTP networks such as the Internet. A VPN is essentially a secure, private tunnel within the Internet. Since VPN calls are placed through a local ISP, they eliminate long distance charges that would occur from directly dialing to a remote private network.

  • Page 24: Chapter 2: 56K Lan M

    In order to establish a tunnel, the client side must have PPTP tunnel client software Side of the Tunnel such as 3Com’s NETBuilder, PathBuilder, Total Control Hub. An additional requirement is Microsoft’s Windows Dial-Up Networking version 1.2 or higher which includes the required software VPN adapter, or Windows NT operating system with Service Pack 3, or Network TeleSystem’s TunnelBuilder™...
  • Page 25 Refer to for more http://www.remoteaccess.3com.com/support/docs/lanmodem 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 . and then enter PPTP in the search field.
  • Page 26 2: 56K LAN M HAPTER ODEM UNCTIONALITY ESCRIPTION...

  • Page 27: Hardware Description And Installation

    A frames-capable, JavaScript-enabled Web browser. A Web browser is required to access and configure your LAN Modem and to view the OfficeConnect 56K LAN Modem User Guide. You may use the customized browser provided on the 3Com Companion Programs CD-ROM, or you may use any frames-capable Web browser, such as Netscape Navigator (3.0 and later) or Microsoft Internet Explorer (3.0 and...

  • Page 28: Chapter 3: Hardware

    NSTALLATION 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. LAN STATUS RD SD...

  • Page 29: Back Panel Connector Description

    Table 4 Front Panel LED Indicator Definitions (continued) Coll Ports 1-4 Back Panel Connector The back panel provides the following components. Description Figure 10 56K LAN Modem Back Panel From left to right the back panel consists of the following. Installing the 56K LAN This section describes how to do the following.

  • Page 30: Installing The Analog Cable

    3: H HAPTER ARDWARE ESCRIPTION AND 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.

  • Page 31: Connecting To Another Ethernet Hub

    Connecting to Another You can connect to another Ethernet hub to allow up to 25 users to access the Ethernet Hub 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.

  • Page 32: Installing Analog Equipment

    3: H HAPTER ARDWARE ESCRIPTION AND Installing Analog You can connect an analog touch-tone telephone, answering machine, fax Equipment 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.
  • Page 33 Installing the Power Cable 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.
  • Page 34 3: H HAPTER ARDWARE ESCRIPTION AND NSTALLATION...

  • Page 35: Setting U Ptcp/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.
  • Page 36 4: S TCP/IP HAPTER ETTING 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.
  • Page 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.

  • Page 38: Tcp/Ip Setup Using Windows Nt

    4: S TCP/IP HAPTER ETTING 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.
  • Page 39 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.
  • Page 40 4: S TCP/IP HAPTER ETTING 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.

  • Page 41: Tcp/Ip Setup Using Mac Os 7.6 Or Later

    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.

  • Page 42: Tcp/Ip Setup Using Windows 3.11

    3Com Companion Programs CD-ROM. Setting up TCP/IP using To set up MS_TCP, do the following. MS_TCP 1 Install MS_TCP, located on the 3Com Companion Programs CD-ROM, onto your hard drive. 2 From the Program manager, click Network. Figure 28 Program Manager Group Box 3 From the Network group box, click Network Setup.
  • Page 43 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.
  • Page 44 4: S TCP/IP HAPTER ETTING INDOWS AND ACINTOSH...

  • Page 45: Typical Configuration

    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”...

  • Page 46: You Should Have This Information

    5: C 56K LAN M HAPTER ONFIGURING THE You Should Have This If you want to set up a connection to an ISP, you will need: Information Determine Whether You Your setup procedure varies depending upon whether you are using a dynamic or Use Dynamic or Static IP a static IP address.

  • Page 47: Setting Up Your Computer If You Have A Static Ip Address

    Setting Up Your If your computer has a static IP address, you must verify and possibly change some Computer If You Have a settings on your computer before you begin the LAN Modem configuration Static IP Address procedure. The 56K LAN Modem must be your gateway to get outside of your LAN as well as one of your DNS servers.

  • Page 48: For Macintosh Users

    5: C 56K LAN M HAPTER ONFIGURING THE 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.

  • Page 49: Configuring The 56K Lan Modem For The Typical Configuration

    Configuring the 56K LAN The following steps allow you to configure the 56K LAN Modem for the typical Modem for the Typical configuration. You may need the IP address which you recorded previously in the Configuration “Setting Up Your Computer If You Have a Static IP Address”section. 1 Launch your Web browser.
  • Page 50 5: C 56K LAN M HAPTER ONFIGURING THE 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.
  • Page 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.

  • Page 52: Configuring A Static Ip Address On The 56K Lan Modem

    From here, you can read any new, up-to-date information, register your product, or perform firmware upgrades as they become available. If you have installed the Custom Browser from the 3Com Companion Programs CD-ROM, access this page at any time by clicking the Updates button from your browser’s Links menu bar.

  • Page 53: Configure Additional Parameters

    From here, you can read any new, up-to-date information, register your product, or perform firmware upgrades as they become available. If you have installed the Custom Browser from the 3Com Companion Programs CD-ROM, access this page at any time by clicking the Updates button from your browser’s Links menu bar.

  • Page 54: Lan Modem Main Page

    5: C 56K LAN M HAPTER ONFIGURING THE 56K LAN Modem Main The 56K LAN Modem main page is shown in Figure 35. From here you can access Page 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.

  • Page 55: Links From The Buttons

    Current Call Status: Jumps to the call statistics page where the latest call information is displayed. Links from the Buttons 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.
  • Page 56 5: C 56K LAN M HAPTER ONFIGURING THE ODEM...

  • Page 57: 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.

  • Page 58: Isp Versus Private Network

    6: A HAPTER DVANCED ONFIGURATION 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.”...

  • Page 59: Setting Up A Connection To The Internet

    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.
  • Page 60 6: A HAPTER DVANCED ONFIGURATION 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.
  • Page 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.

  • Page 62: Chapter 6: Advanced

    6: A HAPTER DVANCED ONFIGURATION Setting Up a Connection This section describes your 56K LAN Modem setup procedures for accessing a to a Private Network private network, such as a remote office or corporate LAN. Before You Begin Before you begin, you will need the following information from your Network Administrator: In addition, you may need the following information, depending on your particular network setup.
  • Page 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.
  • Page 64 6: A HAPTER DVANCED ONFIGURATION 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.

  • Page 65: Associating Service Providers With Computers On The Lan

    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”...

  • Page 66: Editing Service Provider Profiles

    6: A HAPTER DVANCED ONFIGURATION 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.”...

  • Page 67: Configuring Lan Parameters

    Configuring LAN This section describes how to configure the parameters of your LAN. (LAN refers Parameters 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.

  • Page 68: Local Domain Name

    6: A HAPTER DVANCED ONFIGURATION 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.

  • Page 69: Configuring Modem Control Parameters

    If you wish to password protect the configuration profile of the 56K LAN Modem, refer to “Locking and Unlocking the Configuration.” Configuring Modem Most users will be able to safely leave the modem control parameters set to their Control Parameters default values.

  • Page 70: Changing Modem Controls

    6: A HAPTER DVANCED ONFIGURATION Changing Modem To access and make changes to the Modem Control parameters, do the following. Controls 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.

  • Page 71: Changing Data Call Parameters

    Changing Data Call This section describes changing the data call parameter default settings. The data Parameters 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.

  • Page 72: Disconnecting A Manual Data Call

    6: A HAPTER DVANCED ONFIGURATION 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.

  • Page 73: Changing Your Password

    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.

  • Page 74: Configuring The Lan Modem From A Remote Location

    6: A HAPTER DVANCED ONFIGURATION Configuring the LAN This section provides instructions for accessing and making configuration changes Modem from a to your LAN Modem remotely using either another LAN Modem or an analog Remote Location 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.
  • Page 75 Configuring the LAN Modem from a Remote Location 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.
  • Page 76 6: A HAPTER DVANCED ONFIGURATION...

  • Page 77: Placing , Receiving And Disconnecting Calls

    3Com assumes no liability for phone charges or other expenses incurred in connection with the use of this product.

  • Page 78: Placing A Call Manually

    7: P HAPTER LACING ECEIVING AND 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.

  • Page 79: Receiving Calls

    Receiving Calls 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.

  • Page 80: Disconnecting Calls Manually

    7: P HAPTER LACING ECEIVING AND Disconnecting Calls You can disconnect calls manually or utilize timers to disconnect calls automatically. Disconnecting Calls To disconnect calls manually, do the following: Manually 1 From the 56K LAN Modem home page, click Manual Calling. The Manual Call Control window appears.

  • Page 81: Accessing The Script Configuration Page

    Accessing the Script You can associate a unique connection script for each of your four service provider Configuration Page 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.

  • Page 82: Creating A Connection Script

    7: P HAPTER LACING ECEIVING AND Creating a Connection You can choose to manually create a script from within a text editor of your choice Script 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.
  • Page 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.

  • Page 84: Additional Configuration Buttons

    7: P HAPTER LACING ECEIVING AND 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.

  • Page 85: 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. CAUTION: There are no user-serviceable parts inside your 56K LAN Modem. Unauthorized opening of the unit will void the warranty.

  • Page 86: Monitoring The Lan Port Status Leds

    TCP/IP control panel and select Using DHCP Server . The fields should now read <will be supplied by server>. Select File and then Close and save changes when prompted. Enter the following URL in your Web browser: http://192.168.1.1/. Alternatively, you can enter http://3Com.oc.lanmodem. Control...
  • Page 87 If you are using Netscape, launch your Web browser. From the Options menu, select General Preferences . From Browser Starts With, select Home Page Location and then enter a URL such as http://www.3com.com. You must use the new LAN Modem IP address to access the LAN Modem.
  • Page 88 8: T HAPTER ROUBLESHOOTING AND Table 8 Symptoms, Causes, and Solutions Symptom Possible Cause Sending SMTP mail is slow. Only one workstation to one server is supported at one time for SMTP mail. Although multiple service You may not have configured the providers are configured, all IP address and the subnet mask calls are going to the same...
  • Page 89 In order to take advantage of 56K-based analog connections, your remote server (such as an ISP) must support 56K technology. To locate a 56K-enabled ISP in your area, visit http://www.3com.com/56K. Current FCC rules restrict the power output of a Service Provider’s modems, limiting download speeds to 53Kbps.

  • Page 90: Finding More Information

    For more information about the 56K LAN Modem, such as frequently asked Information questions and specific technical notes, go to the following URL, http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html 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.

  • Page 91: Reviewing Statistics

    Reviewing Statistics 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.

  • Page 92: Understanding Last Call Information

    8: T HAPTER ROUBLESHOOTING AND Table 10 Current Call Information Description (continued) Current Call Information Secondary DNS address Data call options Call start time The call has been up for (seconds) The connection has been idle for (seconds) Number of octets received Number of octets transmitted Called telephone number Reason for call coming up...

  • Page 93: Understanding Service Provider Information

    Table 11 Last Call Information Description Last Call Information Reason for call coming up Understanding Service The Service Provider information described in Table 12 is provided after a call has Provider Information ended. Table 12 Service Provider information description Service Provider Information Number of successful connections Number of failed connections...
  • Page 94 8: T HAPTER ROUBLESHOOTING AND AINTENANCE...

  • Page 95: What Is A Network

    ETWORKING RIMER 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? 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.

  • Page 96: How Do Different Devices Communicate With Each Other

    A: N PPENDIX ETWORKING RIMER How does a LAN connect You can connect a LAN to a WAN via a number of devices such as a router or a to a WAN? bridge that can place a call to the remote LAN using an analog telephone line. Routers and bridges are devices that link networks.
  • Page 97 Domain Name Service translates the common alphabetic name into the numeric IP address. For example, www.3com.com is translated to an specific IP address by DNS. If you do not use the DHCP functionality of the 56K LAN Modem, you will have to manually configure the following parameters for each computer on the...

  • Page 98: What Are Numbered And Unnumbered Links

    A: N PPENDIX ETWORKING RIMER 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.
  • Page 99 For assistance with locating an 56K service provider in your area, or for a more detailed explanation of 56K technology, visit 3Com’s 56K Web page at http://www.3com.com/56k...
  • Page 100 A: N PPENDIX ETWORKING RIMER...

  • Page 101: Custom Links

    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.

  • Page 102: Using Favorites

    SING THE USTOM Using Favorites Under the Favorites menu, a subcategory labeled 3Com sites lists several helpful sites already bookmarked for you. These include: Installing the Custom If you already have a version of the Internet Explorer Web browser installed and Internet Explorer you would like to install a later, customized version, you should first uninstall the...
  • Page 103 This appendix lists the factory default settings of the 56K LAN Modem. 56K LAN Modem Refer to Table 13 for the 56K LAN Modem factory defaults. Factory Defaults Table 13 * The 56K LAN Modem attempts to use this default IP address to communicate with the ACTORY EFAULTS 56K LAN Modem Factory Defaults...

  • Page 104: Appendix C: Factory Defaults

    C: F PPENDIX ACTORY EFAULTS...

  • Page 105: General Specifications

    The OfficeConnect LAN Modem is Year 2000 compliant. Specifically, its system clock is capable of accepting and storing dates including and beyond the year 2000. For information on Year 2000 compliance and 3Com products, visit the 3Com Year 2000 web page:...
  • Page 106 D: S PPENDIX PECIFICATIONS...
  • Page 107 LOSSARY 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. baud rate A term used to measure the speed of an analog transmission from one point to another.

  • Page 108: Netbios Filtering

    LOSSARY 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. Internet Service Provider.
  • Page 109 LOSSARY V.34+ 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.
  • Page 110 LOSSARY...
  • Page 111 Alert LED 85, 88 analog cable installation 30 analog equipment installation 32 Auto Answer 79 back panel description 29 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...

  • Page 113: Obtaining Service

    If it appears that any product that is stated to meet this standard does not perform properly with regard to such date data on and after January 1, 2000, and Customer notifies 3Com before the later of April 1, 2000, or ninety (90) days after purchase of the product from 3Com or its authorized reseller, 3Com shall,...

  • Page 114: Governing Law

    THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OTHER HAZARDS, OR ACTS OF GOD. TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL,...

  • Page 115: Fcc Part

    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. Changes or modifications not expressly approved by 3Com could void the user’s authority to operate this equipment.

This manual is also suitable for:

Officeconnect 3c8860Officeconnect 3c8862Officeconnect 3c8864Officeconnect 3c88673c886aOfficeconnect 3c886

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