3Com 3C886 - OfficeConnect 56K LAN Modem Router User Manual
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3Com 3C886 - OfficeConnect 56K LAN Modem Router User Manual

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

User Guide

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  • 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 Copyright © 3Com Corporation, 1999. All rights reserved. No part of this documentation may be 5400 Bayfront Plaza reproduced in any form or by any means or used to make any derivative work (such as translation, Santa Clara, California transformation, or adaptation) without permission from 3Com Corporation.

  • Page 3: Important Safety Information

    Always exercise caution when installing or modifying telephone lines. Do not use a telephone, which is connected to the unit, to report a gas leak in the vicinity of the leak. Do not spill food or liquids on the unit. If the unit gets wet, isolate the electrical supply and contact your 3Com reseller.
  • Page 4 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.

  • Page 5: Table Of Contents

    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 Connectivity Routing Bandwidth Management Remote Management...
  • Page 6 Before You Begin You Should Have This Information Determine Whether You Use Dynamic or Static IP Addresses Setting Up Your Computer If You Have a Static IP Address For Windows 98 and 95 Users For Windows NT 4.0 Users For Macintosh Users For Windows 3.11 Users...
  • Page 7 Understanding Data Call Parameters Minimum Call Duration Disconnecting an Automatic Data Call Disconnecting a Manual Data Call Number of Times to Redial for a Manual Call Delay Between Redial Attempts When Placing a Manual Call Configuring the Data Call Parameters Selective Password Protection...
  • Page 8 Evaluating Symptoms and Solutions Finding More Information Contacting Technical Support Downloading Firmware to Your 56K LAN Modem Resetting the 56K LAN Modem to a Factory Default Setting Resetting the 56K LAN Modem to the Factory Defaults Reviewing Statistics Understanding System Statistics...
  • Page 9 ETWORKING RIMER SING THE USTOM ROWSER ACTORY EFAULTS PECIFICATIONS General Specifications Year 2000 Compliance LOSSARY ORPORATION IMITED ARRANTY FCC C LASS TATEMENT FCC D ECLARATION OF ONFORMITY...

  • Page 11: About This Guide

    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 words “enter” When you see the word “enter” in this guide, you must type and “type” something and then press the Return or Enter key. Do not press the Return or Enter key when an instruction simply says “type.” [Key] names Key names appear in text in one of two ways: Referred to by their labels, such as “the Return key”...

  • Page 13: Introduction

    Local networking with shared access to a remote office LAN 1.Capable of receiving at up to 56 Kbps and sending at up to 33.6 Kbps. Due to FCC regulations, re- ceiving speeds are limited to 53 Kbps. Actual speeds may vary. Requires compatible phone line and serv- er equipment.

  • Page 14: Local Networking With Access To The Internet

    ISDN LAN Modem Analog POTS line 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. Office OfficeConnect™...

  • Page 15: Features

    Connectivity One 56K integrated analog modem Built in four-port 10BASE-T, 10 Mbps Ethernet hub. Up to 25 users can be supported by connecting to an external eight port-hub One pass through analog voice port for connecting an external analog device...

  • Page 16: Protocols

    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). IP address negotiation using IPCP (RFC 1332)

  • Page 17: Warranty

    Features 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

    Internet email. An example of ten workstation connections is shown in Figure 3. 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

    LAN users to share applications, files and printers between computers. For example, if only one computer has a Web browser, other LAN users may share the browser for accessing the Internet. Note that speed will likely be reduced when sharing applications. Refer to your operating system...

  • Page 21: Wan Connection

    Once the call is established, up to four users may share the single connection created by the call over the LAN Modem’s four-port built in hub. Or, up to 25 users may share this connection over an external hub. Figure 6 shows two users on the LAN accessing the Internet through the same Internet provider and over the same connection.

  • Page 22: Call Routing Protocol And Ip Address Translation

    Network ID of the packet matches the Network ID of the Remote Office LAN, with or without Internet access, then the call is placed to the remote LAN. If it does not match the Network ID of the remote LAN, with or without Internet access, then the call is routed to the direct ISP connection.

  • Page 23: Understanding Vpns And Pptp

    One of the protocols which enables a VPN to be created is PPTP. The PPTP protocol allows for multiple workstations to establish a secure multi-protocol connection to a remote, private network via a single, locally-dialed ISP account as shown in Figure 8.

  • Page 24: Setting Up The Server Side Of The Tunnel

    Initiate a tunnel between client and server using your client software Setting Up the Server In order to establish a tunnel, the client side must be able to dial into a PPTP tunnel Side of the Tunnel server on the remote private network such as a Windows NT server version 4.0 or later.
  • Page 25 Understanding VPNs and PPTP 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 for more http://www.remoteaccess.3com.com/support/docs/lanmodem...
  • Page 26 2: 56K LAN M HAPTER ODEM UNCTIONALITY ESCRIPTION...

  • Page 27: Hardware Description And Installation

    If you already have a version of Microsoft’s Internet Explorer Web browser installed and would like to install a later version, you should first uninstall the older version. During installation, you may be asked to replace the older files. It is recommended...

  • Page 28: Front Panel Led Description

    Alert 3C886 Figure 9 56K LAN Modem Front Panel The functions of the front panel LEDs are described in Table 4. These front panel LEDs indicate proper operation and display 10BASE-T and analog port activity status. Table 4 Front Panel LED Indicator Definitions...

  • Page 29: Back Panel Connector Description

    Connect to a 10BASE-T Ethernet LAN Install analog equipment Install the power cable Before You Begin Before you begin, you will need the following in addition to the 56K LAN Modem: RJ-11 (6-pin) to RJ-11 (6-pin) telephone cable which was provided in your modem package.

  • Page 30: Installing The Analog Cable

    To connect a computer to the 56K LAN Modem, do the following. 10BASE-T Ethernet Port 1 Insert one end of the 10BASE-T Ethernet cable into one of the four LAN ports on the back of the 56K LAN Modem, as shown in Figure 12.

  • Page 31: Connecting To Another Ethernet Hub

    LAN Modem does not have an MDI/X switch, you must use a crossover cable. 1 Insert one end of the 10BASE-T Ethernet cable into one of the four LAN ports on the back of the LAN Modem, as shown in Figure 13.

  • Page 32: Installing Analog Equipment

    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. L IN 1 0 - 0 .8...
  • 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 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.
  • Page 37 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.)

  • Page 38: Tcp/Ip Setup Using Windows Nt

    13 Restart Windows 98 or 95 to let these changes take effect. TCP/IP Setup Using Windows NT 4.0 provides TCP/IP as part of its standard operating system. If you Windows NT 4.0 have not already set up TCP/IP, do the following.
  • Page 39 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.
  • Page 40 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.

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

    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

    Manually and then enter the IP address. TCP/IP Setup Using If you are using Windows 3.11, a TCP/IP stack may not be provided as part of the Windows 3.11 operating system. If you do not have a TCP/IP stack, you can use MS_TCP which is provided on the 3Com Companion Programs CD-ROM.
  • Page 43 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.
  • Page 44 4: S TCP/IP HAPTER ETTING INDOWS AND ACINTOSH...

  • Page 45: Typical Configuration

    Installed the hardware as described in Chapter 3, “Hardware Description and Installation” Installed and set up TCP/IP on all the computers you intend to connect to the LAN Modem. If TCP/IP is not installed and set up, refer to Chapter 4.

  • Page 46: You Should Have This Information

    If you determine that your computer has a static IP address, refer to “Setting Up Your Computer If You Have a Static IP Address.” If your computer has a dynamic IP address, you may begin configuring the 56K LAN Modem directly. Refer to “Configuring the 56K LAN Modem for the Typical Configuration”.

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

    LAN as well as one of your DNS servers. Follow the procedure in the appropriate section to make sure that this is the case. Note that if your computer has a dynamic IP address, this configuration would occur automatically and you can go on to “Configuring the 56K LAN Modem for the Typical Configuration”.

  • Page 48: For Macintosh Users

    HAPTER ONFIGURING THE ODEM 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.

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

    LAN Modem will change its default IP address. If this occurs, the unit will reset itself and then function as described in this section. Regardless of the start page to which your Web browser is set, your Web browser will go to the 56K LAN Modem configuration setup screen.
  • Page 50 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. Refer to “Setting Up Additional Service Providers”for instructions on configuring your ISP connection manually.
  • Page 51 9 In the User ID and Password fields, enter your user ID and password for your ISP account. 10 If your ISP requires a DNS address, enter it in the DNS Address field. If you are not sure, leave this field blank.

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

    ONFIGURING THE ODEM 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”.

  • Page 53: Configure Additional Parameters

    Otherwise, visit the LAN Modem homepage directly at the following URL: http://www.remoteaccess.3com.com/support/docs/lanmodem/welcom e.html If you would like to configure another ISP or a connection to a remote office LAN, Configure Additional Parameters access the main configuration page via one of the following methods: If you are using the 56K LAN Modem custom Web browser, click Configure Modem to modify additional parameters.

  • Page 54: Lan Modem Main Page

    ONFIGURING THE ODEM 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

    ISP using the ISP Wizard, invoking the ISP Wizard again will create a new profile and overwrite any previous settings. If you would like to add a second ISP profile, use the Service Providers icon to access the Service Providers configuration page.
  • Page 56 5: C 56K LAN M HAPTER ONFIGURING THE ODEM...

  • Page 57: Advanced

    Associating computers on the LAN with selected service providers Editing service provider profiles If you have set up a connection to an ISP as part of the typical (that is, initial) setup procedure, then you have already defined one service provider. Because this is considered a typical configuration, some default values have been assumed.

  • Page 58: Isp Versus Private Network

    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.

  • Page 59: Setting Up A Connection To The Internet

    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.
  • Page 60 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 Setting Up Additional Service Providers 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: Setting Up A Connection To A Private Network

    DNS IP address(es) Setting Up a Connection to a Remote LAN The following steps allow you to set up a connection to a remote LAN. 1 From the 56K LAN Modem main page, click the Service Providers image. The Service Provider Selection window appears.
  • Page 63 Setting Up Additional Service Providers 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.
  • Page 64 If you select No, you will have to manually launch a call to this service provider every time you want to connect. You may want to set this field to No if your calls are being connected unintentionally as a result of packets generated by your workstations.

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

    Providers, you can see the service providers which are accessible from this computer. If you have more than one ISP configured, all calls will be routed to the first ISP listed. To connect to another ISP that you have configured, uncheck the box(es) of...

  • Page 66: Editing Service Provider Profiles

    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

    The 56K LAN Modem attempts to use its default IP address to communicate with the computer. If communication cannot be established, the 56K LAN Modem will change its default IP address. If this occurs, the IP address shown in Figure 40 will be different.

  • Page 68: Local Domain Name

    3 In the Subnet Mask field, review the default and enter a different subnet mask if required. 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.

  • 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. However, advanced users may wish to further define the manner in which the LAN Modem operates.

  • Page 70: Changing Modem Controls

    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.

  • Page 71: Changing Data Call Parameters

    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.

  • Page 72: Disconnecting A Manual Data Call

    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

    3 Enter your new password in the Password (repeat) field to verify. 4 Click Submit. Once you have set a password on your LAN Modem, and the unit remains idle for five minutes or longer, you may be “locked out” of the WebWizard screen. If this occurs, you will be prompted to enter your password in order to gain access to the WebWizard.

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

    No user name or password is needed. You must use an arbitrary numbered WAN link that is different from the two networks. 3 Run your web browser, and enter the IP address of the remote LAN Modem as the URL.
  • Page 75 11 Click TCP/IP Settings. The TCP/IP Settings window opens. 12 Click Specify an IP address and enter an IP address for your computer. Enter 192.168.2.1 if you are not sure. 13 Leave the other options for this window at their default settings, including the radio button for Server assigned name server addresses.
  • Page 76 6: A HAPTER DVANCED ONFIGURATION...

  • Page 77: Placing , Receiving And Disconnecting Calls

    Using a connection script Placing Calls 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.

  • Page 78: Placing A Call Manually

    1 From the 56K LAN Modem home page, click the Manual Calling button. The Manual Call Control window appears. 2 In the table, locate the name of the service provider to which you wish to connect. Verify that a call is not already connected to that or another destination by looking under the Status of Call column.

  • Page 79: Receiving Calls

    LAN Modem to never answer incoming calls, choose “Disable.” 3 Click Submit. Incoming calls for data transfer are not supported. For example, you cannot call into the 56K LAN Modem to use a computer as a server that others would dial into and use for accessing information.

  • Page 80: Disconnecting Calls Manually

    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.

  • Page 81: Accessing The Script Configuration Page

    1 From the LAN Modem main page, click the Service Providers icon. The Service Provider Selection page opens. 2 Choose the service provider for which you want to create or edit an existing connection script and click Select. If you are creating a new service provider, choose New (Internet Service Provider) or New (Private Network) and click Select.

  • Page 82: Creating A Connection Script

    ISCONNECTING ALLS 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 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.

  • Page 84: Additional Configuration Buttons

    LACING ECEIVING AND ISCONNECTING ALLS 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.

  • Page 85: Troubleshooting And Maintenance

    If the ALERT LED flashes for more than several seconds, it is either in firmware download mode or there is an internal failure. If the 56K LAN Modem is not in firmware download mode, notify your reseller that the 56K LAN Modem has...

  • Page 86: Monitoring The Lan Port Status Leds

    ROUBLESHOOTING AND AINTENANCE 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.
  • Page 87 2 Double click Advanced and click Proxies. 3 Check the box labeled Direct connection to the Internet. There is a configuration problem. Reset the 56K LAN Modem to the factory default setting. Refer to “Resetting the 56K LAN Modem to a Factory Default Setting” for assistance.
  • Page 88 A data call may be in progress. Disconnect any data calls currently in progress. CD LED does not remain green. The user name and/or password Make sure that the user name and password for this for this service provider may not service provider are entered accurately on the Service be entered properly.
  • Page 89 Network and then the Configuration tab. Click the File and Print Sharing button. Clear both check boxes and then click OK. Make sure that the timeout value is not set to “0”. Check the timeouts configured for the 56K LAN Modem as explained in “Changing Data Call Parameters”...

  • Page 90: Finding More Information

    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. Contacting Technical Refer to the technical support card that was included with your LAN Modem to Support locate the technical support telephone number for your location.

  • Page 91: Reviewing Statistics

    Displays the firmware version of the 56K LAN Modem. Boot software version number For internal use only. The LAN Modem has been up for Displays the length of time the 56K LAN Modem has been running. This timer is cleared when the unit is power cycled or reset.

  • Page 92: Understanding Last Call Information

    DNS address is not needed. Data call options If the current call is a data call, indicates the type of data call (i.e.,PPP), the type of PPP authentication negotiated, and whether hi/fn LZS compression is on or off. For example, PPP PAP/Compression-On.

  • Page 93: Understanding Service Provider Information

    “DNS query from Workstation A for http://www.xxx.com.” “Packet from Workstation A to IP address xxxx.” Understanding Service The Service Provider information described in Table 12 is provided after a call has ended. Provider Information Table 12 Service Provider information description...
  • Page 94 8: T HAPTER ROUBLESHOOTING AND AINTENANCE...
  • Page 95 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. A network can be in the same room, the same building covering a local area or geographically dispersed over a wide area.
  • Page 96 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.
  • Page 97 The bits of the subnet mask are set to 1 if the host should treat the corresponding bit in the IP address as part of the original network number. These bits in the mask are set to 0 if the host should treat the bits as part of the device number as shown in Figure 46.
  • Page 98 ISP for access. This allows multiple users on your LAN to appear as one connection to your ISP. You probably do not want to use NAT If your LAN network is static; that is, an IP address is assigned to your computer by your MIS department or ISP and manually configured.
  • Page 99 Internet and on-line service providers use at their end to connect to the PSTN, such as a T1 or an ISDN BRI line. Typically, the only analog portion of the PSTN is the phone line that connects your home to the telephone company’s central office (CO).
  • Page 100 A: N PPENDIX ETWORKING RIMER...
  • Page 101 Click here to jump to the 56K LAN Modem registration page. Updates Click here to jump to the site where you will find the latest information on the 56K LAN Modem such as the latest firmware version and user documentation.
  • Page 102 This takes you the 3Com Support Web site. 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 Browser previous version.
  • Page 103 * The 56K LAN Modem attempts to use this default IP address to communicate with the computer during initial configuration. If communication cannot be established initially, the 56K LAN Modem will change its default IP address. If this occurs, the IP address will be different from the default shown here.
  • Page 104 C: F PPENDIX ACTORY EFAULTS...

  • Page 105: General Specifications

    110-240 VAC Output 13 VDC * You must use the power supply provided with your 56K LAN Modem. 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.
  • Page 106 D: S PPENDIX PECIFICATIONS...
  • Page 107 Value set at the factory. Domain A domain is a unique name which refers to a single device on the Internet and is used for organizational purposes. Domain Name Server. DNS translates the common alphabetic name into the numeric IP address. For example, Oscar’s_PC is translated to 192.168.1.2.
  • Page 108 IP address An IP address is a set of numbers that uniquely identifies each device in a network. Internet Service Provider. A business that supplies access to the Internet such as your telephone company or AOL.
  • Page 109 Internet and on-line service providers use at their end to connect to the PSTN, such as a T1 or an ISDN BRI line. A virtual private network is a secure, private data network that is established over the Internet, resulting in cost savings by using local, toll free access numbers.
  • Page 110 LOSSARY...
  • Page 111 LAN 65 setting up a connection to 58 editing profiles 66 IP address setting up a connection to a private determining if static or dynamic 46 network 62 reserving workstation 65 setting up a connection to an ISP 58 resetting workstation...
  • Page 113 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 If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna.
  • Page 115 An FCC compliant telephone cord with a modular plug is provided with this equipment. This device connects to the telephone network via an RJ -11 plug and jack. The plug and jack also comply with FCC part 68 rules. Be sure that the telephone line you are connecting the modem to is a standard analog line and not a digital (PBX), party, or coin telephone line.

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