3Com® Router 5000 Family Getting Started Guide www.3Com.com/ Part Number 10015122 Rev. AB Published September 2007 Mfg.
3Com Corporation 350 Campus Drive Marlborough, MA 01752-3064 Copyright © 2006–2007, 3Com Corporation. 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 written permission from 3Com Corporation.
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Contents 5 Contents Download the latest software and documentation for your 3Com® Router Contents About This Guide Before You Start 9 Release Notes 9 CD-ROM 9 Conventions 10 Related Documentation 10 Documentation Comments 11 1 Introducing the Router 5000 Family About the Router 5000 13 3Com Router 5012 (3C13701) Indicators 16 System Description 16 3Com Router 5232 (3C13751) Indicators 18 System Description 19 3Com Router 5642 (3C13755) Indicators 20 System Description 21 3Com Router 5682 (3C13759) Indi
Contents 2 Installation Installing the Router on a Workbench 25 Installing the Router in a Rack 25 Power Cords, Grounds and Cables 26 PGND Wire 26 Power Cord 27 Power input and PGND 27 AC Power Cord 27 Console Terminal 29 Router to LAN Connection 30 Router to WAN Connection 31 Connecting the AUX port to the Modem WAN Interface to DSU/CSU 32 3 31 Starting and Configuring the Router 5000 Startup of the Router 5000 43 Setting up Configuration Environment 43 Powering on the Router 45 Startup Process 46
Contents Solve Problems Online 67 Purchase Extended Warranty and Professional Services Access Software Downloads 68 Contact Us 69 Telephone Technical Support and Repair 69 68 7
Contents
About This Guide This guide provides the information you need to install and use the 3Com® Router 5000 Family. The guide is intended for use by network administrators who are responsible for installing and configuring network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks). Before You Start Release Notes This section contains information about the documents and CD-ROM that accompany your Router 5000.
About This Guide Conventions Table 1 lists conventions that are used throughout this guide.
Documentation Comments 11 Documentation Comments Your suggestions are very important to us. They will help make our documentation more useful to you. Please e-mail comments about this document to 3Com at: pddtechpubs_comments@3com.com Please include the following information when commenting: ■ Document title ■ Document part number (on the title page) ■ Page number (if appropriate) Example: Router 5000 Family Getting Started Guide Part Number 10015122 Rev.
About This Guide
About the Router 5000 13 1 Introducing the Router 5000 Family This section introduces the 3Com® Router 5000 and describes how it can be used in your network. It also describes the different models of Router 5000, including: About the Router 5000 ■ 3Com Router 5012 (3C13701) ■ 3Com Router 5232 (3C13751) ■ 3Com Router 5642 (3C13755) ■ 3Com Router 5682 (3C13759) The 3Com Router 5000 Family is intended for use on enterprise-level networks.
Chapter 1: Introducing the Router 5000 Family Multiple interface card/interface module options The Router 5000 provides SIC slots and MIM slots for installing expansion modules including serial interfaces, T1/CT1/PRI interface, E1/CE1/PRI interface, BRI S/T and U interfaces, Ethernet interface (including FE/GE, electrical interface and fiber interface), ADSL/G.SHDSL interface, ATM 25M/155M interface, and so on.
3Com Router 5012 (3C13701) 15 3Com Router 5012 (3C13701) Figure 1 Front view of 3Com Router 5012 1) POWER 2) SYSTEM 3) SLOT1 4) SLOT2 5) SLOT3 6) WAN 7) LAN Figure 2 Rear view of 3Com Router 5012 1) Power switch 2) Power socket 3) Grounding screw 4) Fixed interface (WAN) 5) Console port (CON) 6) Auxiliary port (AUX) 7) Fixed Ethernet interface (LAN) 8) MIM slot 1 9) SIC slot 2 10) SIC slot 3
Chapter 1: Introducing the Router 5000 Family Indicators Eight indicators are provided on 3Com Router 5012. Their meaning is explained in the following table: Table 2 Router 5012 Indicators LED Indication POWER System power LED: OFF means power is off, ON means power is on. SYSTEM Hardware system operating LED. Blinking indicates that the system is in normal operation. Steady ON or OFF means that the system is in abnormal operation. SLOT1 MIM LED.
3Com Router 5232 (3C13751) 17 Table 3 System description of 3Com Router 5012 (continued) 3Com Router 5232 (3C13751) Item Description Input voltage Rated voltage range: 100 to 240 VAC, 50 or 60 Hz Max voltage range: 85 to 264 VAC, 47 to 63 Hz System power consumption 60 W Operating temperature 0 to 40°C (32°F to 104°F) Relative humidity (noncondensing) 5% to 90% ■ SDRAM (synchronous dynamic random-access memory): As the primary memory, stores data for communication with CPU during system operat
Chapter 1: Introducing the Router 5000 Family Figure 4 Rear view of 3Com Router 5232 Indicators 1) Power switch 2) Power socket 3) Grounding screw 4) Fixed LAN interface (LAN0) 5) Fixed WAN interface (WAN0) 6) MIM SLOT1 7) MIM SLOT2 8) MIM SLOT3 10 indicators are provided on 3Com Router 5232. Their meaning is explained in the following table: Table 4 LEDs of 3Com 5232 Router LED Indication POWER System power LED: OFF means power is off, ON means power is on.
3Com Router 5232 (3C13751) 19 System Description Table 5 System description of 3Com Router 5232 Item Description Fixed interface One AUX port One console port Two LAN ports Slot 3 MIM slots CPU MPC 8245 300 MHz NVRAM 128 KB Boot ROM 512 KB SDRAM 256 MB Flash 32 MB Physical dimensions (H x W x D) 44.4 x 442 x 413 mm (1.7 x 17.4 x 12.4 in.) Weight 8 kg (17.6 lb) Input voltage Rated voltage range: 100 to 240 VAC, 50 or 60 Hz Max.
Chapter 1: Introducing the Router 5000 Family 3Com Router 5642 (3C13755) Figure 5 Front view of 3Com Router 5642 { (1) (2) (3) (4) (5) 1) POWER 2) SYSTEM 4) CON 5) SLOT0~3 (READY/ACTIVE) 3) AUX Figure 6 Rear view of 3Com Router 5642 (1) (2) (3) (7) (6) (4) (5) 1) Power switch 2) Power socket 3) Grounding screw 4) MIM SLOT1 5) MIM SLOT0 6) MIM SLOT2 7) MIM SLOT3 Indicators The Router 5642 LED indicators are described in the following table: Table 6 Router 5642 Indicators LED I
3Com Router 5642 (3C13755) 21 Table 6 Router 5642 Indicators (continued) System Description LED Indication LAN Ethernet interface LED: Green means the interface is normal. Blinking yellow means data is being transceived over the Ethernet. Table 7 System description of 3Com Router 5642 Item Description Slot 4 MIM slots CPU MPC8245 300 MHz NVRAM 128 KB Boot ROM 512 KB SDRAM 256 MB Flash 32 MB Physical dimensions (H x W x D) 88.2 x 442 x 413 mm (3.5 x 17.4 x 16.3 in.
Chapter 1: Introducing the Router 5000 Family 3Com Router 5682 (3C13759) Figure 7 Front view of 3Com Router 5682 1) POWER 2) SYSTEM 3) AUX 4) CON 5) SLOT0~7 (READY/ACTIVE) Figure 8 Rear view of 3Com Router 5682 1) Power switch 2) Power socket 3) Grounding screw 4) MIM SLOT1 5) MIM SLOT0 6) MIM SLOT2 7) MIM SLOT3 8) MIM SLOT4 9) MIM SLOT5 10) MIM SLOT6 11) MIM SLOT7
3Com Router 5682 (3C13759) 23 Indicators 18 LEDs are provided on 3Com Router 5682 Router. Their meaning is explained in the following table: Table 8 Router 5682 Indicators System Description LED Indication POWER System power LED: OFF means power is off. ON means power is on. When redundant power supplies (RPS) are installed, POWER lights when RPS works normally, POWER blinks when only one power supply fails; POWER is OFF when both power supplies fail.
Chapter 1: Introducing the Router 5000 Family
Installing the Router on a Workbench 25 2 Installation This section describes installation of the router: Installing the Router on a Workbench Installing the Router in a Rack ■ Installing the router on a workbench ■ Installing the router in a rack If you are not rack-mounting the router, place it on a clean, sturdy bench top. Observe the following guidelines: ■ Ensure the stability and well-grounding of the workbench. ■ Leave a space of 10 cm around the router for heat dissipation.
Chapter 2: Installation Power Cords, Grounds and Cables PGND Wire WARNING: The normal connection of the PGND wire is an important guard against the lightning and interference. Therefore, the user must first correctly connect the PGND wire before installing and using the device. The power input end of the Router 5000 is connected to a noise filter. The neutral point of the noise filter is directly connected to the chassis and is called protection ground (PGND).
Power Cords, Grounds and Cables 27 Use a PGND wire to connect the screw to the earth ground, and the grounding resistance should not be greater than 5-ohm. Likewise, if the router is installed in a 19-inch standard rack, this rack is required to be grounded too. CAUTION: When the router is in normal operation, it is required to be well grounded. Otherwise, the router cannot reliably avoid lightning, which may damage the router itself and even the peer device.
Chapter 2: Installation Figure 11 AC Power Connector (1) Power switch (2) AC input receptacle Recommended power outlet The user is recommended to use a single-phase 3-core outlet with a neutral point or a multi-functional computer power socket. The neutral point of the outlet should be grounded reliably. Normally, the neutral point of the power supply system in a building is buried in the ground during the construction and cabling.
Console Terminal 29 Console Terminal Introduction to console port 3Com 5000 Router provides an RS232 asynchronous serial console (CON) port, through which configuration of the router can be performed. For the attributes of the console port, refer to Table 12.
Chapter 2: Installation Router to LAN Connection Introduction to the Ethernet interface The Router 5000 provide fixed 100BASE-TX FE interface(s). For the interface attributes, refer to Table 13. Table 13 Attributes of the Ethernet interface Attribute Description Connector RJ45 Interface MDI Operating mode 10/100Mbps auto-sensing Full duplex/half duplex Ethernet MDI (Media Dependent Interface) is the typical Ethernet interface on ordinary network cards.
Router to WAN Connection 31 Router to WAN Connection Connecting the AUX port to the Modem The Router 5000 provide multiple types of WAN interfaces, and the fixed WAN interfaces include an AUX port and a WAN interface (synchronous/asynchronous serial interface). This section describes the connection of the two interfaces. Introduction to the AUX port As an RS232-compliant asynchronous serial interface, the AUX port can be used as the backup of other WAN interface in the dial-up mode.
Chapter 2: Installation Figure 14 AUX cable assembly WAN Interface to DSU/CSU Introduction to the synchronous/asynchronous serial interface The fixed WAN interface of the Router 5000 is a synchronous/asynchronous serial interface, which is usually used for the connection with a WAN device, such as a Modem or CSU/DSU. It can operate in the synchronous/asynchronous mode or DTE/DCE mode, depending on the application. For the attributes of the interface, please refer to Table 15.
Router to WAN Connection 33 Table 15 Attributes of the synchronous/asynchronous serial interface Description Attribute Synchronous Asynchronous Function DDN leased line backup Modem dial-up Terminal access Backup Asynchronous lease line terminal access Protocol PPP PPP MP SLIP LAPB MP HDLC X.25 Frame Relay ■ Synchronous/asynchronous mode Synchronous/Asynchronous serial interface can work in either synchronous or asynchronous mode.
Chapter 2: Installation CAUTION: The baud rate should not exceed 64kbps when the V.24 cable operates in synchronous mode. ■ DTE and DCE Synchronous serial interface can operate in both DTE and DCE mode. For two devices connected directly, one should operate in DTE mode, and the other should operate in DCE mode.
Router to WAN Connection 35 Figure 15 V.24 (RS232) DTE cable assembly ■ V.24 (RS232) DCE cable assembly Figure 16 V.24 (RS232) DCE cable assembly ■ V.
Chapter 2: Installation Figure 17 V.35 DTE cable assembly ■ V.35 DCE cable assembly Figure 18 V.35 DCE cable assembly ■ X.
Router to WAN Connection 37 Figure 19 X.21 DTE cable assembly ■ X.21 DCE cable assembly Figure 20 X.21 DCE cable assembly The synchronous/asynchronous series interface matches a DB28 connector, and current these types of synchronous/asynchronous series interface cables are supported: ■ V.24 (RS232) DTE cable: DB25 (male) connector ■ V.24 (RS232) DCE cable: DB25 (female) connector ■ V.35 DTE: 34PIN (male) connector ■ V.35 DCE: 34PIN (female) connector ■ X.21 DTE: DB15 (male) connector ■ X.
Chapter 2: Installation Figure 21 V24 DTE cable assembly ■ V.24 DCE cable assembly Figure 22 V.24 DCE cable assembly ■ V.35 DTE cable assembly Figure 23 V.35 DTE cable assembly ■ V.
Router to WAN Connection 39 Figure 24 V.35 DCE cable assembly ■ X.21 DTE cable assembly Figure 25 X.21 DTE cable assembly ■ X.21 DCE cable assembly Figure 26 X.21 DCE cable assembly CAUTION: These cables are optional, and must be purchased in addition to the router.
Chapter 2: Installation E1 interface to DSU/CSU Introduction to the E1 interface E1 interface, which stands for channelized CE1/PRI interface, is responsible for forwarding and processing E1 data flow, delivering CE1 access and implementing ISDN PRI function. Its attributes are listed in the following table: Table 17 E1 interface attributes Attribute Description Connector type DB15 Interface standard G.703, G.704 Maximum baud rate 2.
Router to WAN Connection 41 The cable is attached with DB15 (male) connector for the router end, and with RJ45 connector for the network end. See the following figure: Figure 28 E1 120Ω balanced twisted pair cable You can also choose to attach both ends with RJ45 connectors, for extending two 120? balanced twisted pair cables. E1 interface cable, coax connector assembly, network connector assembly and 75Ω-120Ω converter all are optional.
Chapter 2: Installation T1 interface to DSU/CSU Introduction to the T1 interface T1 interface, which stands for channelized CT1/PRI interface, is responsible for forwarding and processing T1 data flow, delivering CT1 access and implementing ISDN PRI function. Its attributes are listed in the following table: Table 18 T1interface attributes Attribute Description Connector type RJ45 Interface standard G.703/T1 102, G.704 Maximum baud rate 1.
Startup of the Router 5000 43 3 Starting and Configuring the Router 5000 Startup of the Router 5000 Setting up Configuration Environment You can only configure the router through the console port if it is the first time you use it. Connecting the router to a console terminal To set up the local configuration environment, the RJ-45 connector of the console cable needs to be connected to the console port on the router, and the DB-25 or DB-9 connector to the serial interface of a PC.
Chapter 3: Starting and Configuring the Router 5000 Setting terminal parameters Follow these steps to set the parameters of the Hyper Terminal in Windows98: 1 Select a connection port. Select the serial interface to be connected in the [Connect using] box, as shown in Figure 32. Please note that the selected serial interface should be consistent with the actual serial interface connected by the console cable.
Startup of the Router 5000 45 Figure 33 Setting serial interface parameters 3 Set HyperTerminal properties. Select [Properties\Port Settings] in the HyperTerminal to enter the properties setting window. Select the terminal emulation type to be VT100 or Auto detect, and click to return to the HyperTerminal window. Powering on the Router Checking before power-on Check according to the following items before powering on the router. ■ Whether the power cord and PGND wire are correctly connected.
Chapter 3: Starting and Configuring the Router 5000 Checking/operating after power-on After the router is powered on, please perform the following inspection. 1 Whether the LEDs on the front panel are normal ■ In the process of the Power On Self Test (POST), the LEDs light in the following sequence: SLOT1 to 3 are ON first. Then, if SLOT 2 and 3 are ON, it means that the memory test is successful. If SLOT 1 and 2 are ON, it indicates the failure of the memory test.
Startup of the Router 5000 47 Press and the system will enter the Boot menu. Otherwise, the system will enter the program decompression process. ■ After “3Com Router 5000 Boot ROM, V9.19” appears, “3Com start booting, (V2.00)” will disappear immediately. ■ The system enters the Boot menu only if is pressed immediately (within three seconds) after the statement “Press Ctrl-B to Enter Boot Menu...” appears. Otherwise, you will enter the program decompression process.
Chapter 3: Starting and Configuring the Router 5000 Configuration Fundamentals of the Router In general, the configuration steps are as follows: 1 Before configuring the router, the networking requirements should be made specific, which include networking purpose, the role of the router in the network, the division of subnets, WAN type and transmission medium, the network security policy and reliability. 2 Based on the above requirements, draw a clear and integrated networking diagram.
Configuration Fundamentals of the Router 49 ■ Provides network diagnostic tools, such as Tracert and Ping, to quickly diagnose the availability of the network. ■ Provides all kinds of detailed debugging information to diagnose network faults. ■ The command line interpreter adopts fuzzy search for the keywords of the command. If the user enters the conflict-free keyword for a command, the command will be interpreted accordingly. For example, for a display command, the user can just enter dis.
Chapter 3: Starting and Configuring the Router 5000
Troubleshooting the Power System 51 4 Troubleshooting Troubleshooting the Power System Fault: POWER LED is OFF or blinking. Troubleshooting: Check: ■ Whether the power switch of the router is turned on. ■ Whether the power supply switch is turned on. ■ Whether the power cord of the router is properly connected. ■ Whether the power supply matches the requirement of the router. CAUTION: Do not hot swap the power cord.
Chapter 4: Troubleshooting Troubleshooting of “displaying illegible characters on the terminal” Fault: After the POST of the router, the console terminal displays illegible characters. Troubleshooting: Verify whether the terminal (e.g., the HyperTerminal) parameter settings are as follows: Baud rate: 9600, Data bits: 8, Stop bit: 1, Parity: None, Flow control: None and Terminal emulation: VT100 If the parameter settings differ from the above values, please reconfigure.
Application Software Upgrade 53 The user can decide whether the SDRAM has fault by checking the LED status of the router. During the router’s POST, the SLOT1 to 3 LEDs and SERIAL0 LED will be ON first. In this case, if the SLOT1 and SLOT2 LEDs light, it can be concluded that the SDRAM test has failed. If the SDRAM is damaged, replace it with a new one (before opening the chassis, please contact the agent of 3Com Corporation Co, Ltd. and get his permission to continue with the operation).
Chapter 4: Troubleshooting Upgrade the application software again after the problem is solved. Fault 2: When upgrading the software using the TFTP approach, and the system displays the following message: Loading... NET download completed... read len = [05567609] The downloaded software is not a valid version. Please download the correct version. Press key when ready. Troubleshooting The Router 5000 should be loaded with different application software versions.
Introduction 55 5 Router Software Maintenance Introduction The Router manages three types of files: ■ Boot ROM image file used for booting the application at boot ■ Application image file (main software) ■ Configuration file Software maintenance mainly involves these three types of files, including: ■ Upgrading application and Boot ROM image through XMODEM ■ Upgrading the application image through TFTP ■ Uploading/downloading the application image and configuration file through FTP The Router
Chapter 5: Router Software Maintenance Software Maintenance under v 3.11 Environment This section describes how to maintain the Boot ROM image using V9.19 as an example. The entire Boot ROM image file in this section includes two segments: extended and basic. You can separately upgrade and back up the extended segment. Boot Menu Start the router; when the message “Press Ctrl-B to enter Boot Menu ..........” appears, press .
Software Maintenance under v 3.11 Environment 57 3 Set the type of the application image file to change the type of a boot file or order in which the boot files are selected. The dual image function is available with the router. By default, the system defines and attempts to boot in order with three boot files: main, backup, and secure, provided they are available from Flash memory. If the router fails to boot with the secure boot file, it prompts the boot failure.
Chapter 5: Router Software Maintenance M=MAIN B=BACKUP S=SECURE ************************************************************ NO. Name Size Type Time 1 main.bin 5988025 M Oct/10/2002 10:10:10 2 backup.bin 5985198 B Oct/10/2002 10:10:10 3 a.bin 987491 N/A Oct/10/2002 10:10:10 4 secure.bin 988022 S Oct/10/2002 10:10:10 ************************************************************ 5 Exit to main menu Enter your choice(1-5): 3 In this menu, select <3> for example to change the file type of a.bin.
Software Maintenance under v 3.11 Environment 59 6 Clear console authentication. This option allows you to log in from the console port without authentication. Select the option; exit and then restart the router. The screen displays “Login authentication ignored”, allowing you to log in from the console port without authentication. Note that this is a one-time operation. It takes effect only at the first reboot after resetting console authentication is selected.
Chapter 5: Router Software Maintenance software version. If the system prompts “invalid version” in this case, you can select from Main Menu to have the system skip version check during upgrade. This, however, works only once; the system checks software version all the same at reboot. 2 Select to exit and reboot the router. To enter Boot Menu, you must press within three seconds after the information “Press Ctrl-B to enter Boot Menu...” appears.
Software Maintenance under v 3.11 Environment 61 To validate the new baud rate set on the console terminal, you must disconnect and then reconnect the terminal emulation program. 4 Select [Transfer/Send file…] in the HyperTerminal window. The following window pops up: Figure 34 Send File dialog box 5 In the displayed Send file dialog box, click to select the application image file to be downloaded, and select XMODEM for the Protocol field. Then click .
Chapter 5: Router Software Maintenance Restore the baud rate of the console terminal to 9600 bps as prompted, disconnect the terminal and dial again. Then, you can see the system boot banner.
Software Maintenance under v 3.11 Environment 63 Step 2: In Boot ROM Download Menu, select <4> to copy the current extended segment to Flash memory. Backup Extended Segment, are you sure?[Y/N] Enter . For a successful backup, the console screen displays: Writing to FLASH.Please wait...#### Backuping Boot ROM program to FLASH successed! Step 3: When Boot ROM Download Menu appears again, select <5> to and reboot the router.
Chapter 5: Router Software Maintenance CAUTION: No TFTP/FTP Server is available with the Router 5000. You must install one yourself. 1 Start TFTP or FTP Server on the PC connected to the Ethernet interface on the router and set the path for getting the source file. Given FTP Server, you need to set user name and password in addition.
Software Maintenance under v 3.11 Environment 65 inet on ethernet (e) : IP address of the Ethernet interface for downloading host inet (h) : IP address of FTP Server user (u): User name, same as the one configured at FTP Server. ftp password (pw) (blank = use rsh): Password, which must be consistent with that at FTP Server flags (f): 0x0 After you configure these parameters, the system saves them automatically. 4 Press to return to Net Port Download Menu, and there select <2>.
Chapter 5: Router Software Maintenance Dealing with a Router Password Loss Contact our technical staff in the event of Boot ROM password or user password loss. They can help you to set a new password.
A OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS 3Com offers product registration, case management, and repair services through eSupport.3com.com. You must have a user name and password to access these services, which are described in this appendix. Register Your Product to Gain Service Benefits To take advantage of warranty and other service benefits, you must first register your product at: http://eSupport.3com.
APPENDIX A: OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS Purchase Extended Warranty and Professional Services To enhance response times or extend your warranty benefits, you can purchase value-added services such as 24x7 telephone technical support, software upgrades, onsite assistance, or advanced hardware replacement. Experienced engineers are available to manage your installation with minimal disruption to your network.
Contact Us Contact Us Telephone Technical Support and Repair 69 3Com offers telephone, internet, and e-mail access to technical support and repair services. To access these services for your region, use the appropriate telephone number, URL, or e-mail address from the table in the next section. To obtain telephone support as part of your warranty and other service benefits, you must first register your product at: http://eSupport.3com.
APPENDIX A: OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS Country Telephone Number Country Telephone Number Philippines 1800 144 10220 or 029003078 800 810 0504 800 616 1463 080 698 0880 00801 444 318 001 800 441 2152 Asia, Pacific Rim — Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand 1800 075 316 2907 0456 000 800 440 1193 001 803 852 9825 03 3507 5984 1800 812 612 0800 450 454 PR of China Singapore South.
Contact Us Country Telephone Number 71 Country Telephone Number Guatemala Haiti Honduras Jamaica Martinique Mexico Nicaragua Panama Paraguay Peru Puerto Rico Salvador Trinidad and Tobago Uruguay Venezuela Virgin Islands AT&T +800 998 2112 57 1 657 0888 AT&T +800 998 2112 1 800 998 2112 571 657 0888 01 800 849CARE AT&T +800 998 2112 AT&T +800 998 2112 54 11 4894 1888 AT&T +800 998 2112 1 800 998 2112 AT&T +800 998 2112 1 800 998 2112 AT&T +800 998 2112 AT&T +800 998 2112 57 1 657 0888 Latin America —
APPENDIX A: OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS
