3Com Network Router NETBuilder II User Manual

®
NETBuilder II HSSI Module  
Installation Guide  
®
A member of the NETBuilder family  
THE  
PRESIDENT S  
ENVIRONMENT  
AN D  
CONSERVATION  
CH ALLEN GE  
AWA RD  
1992  
For 3Com User Group Information  
1-800-NET-3Com  
or your local 3Com office  
Manual Part No. 09-0489-000  
Published January, 1994. Printed in the U.S.A.  
 
BeforeYou Begin  
This guide describes how to install, cable, maintain, and troubleshoot the High-Speed Serial  
®
Interface (HSSI) module for the NETBuilder II base system. The information in this guide  
applies to the NETBuilder II 4-slot chassis and the NETBuilder II 8-slot chassis.  
For more information about the NETBuilder II base system installation, refer to the  
NETBuilder II Base System Installation Guide.  
This guide is intended for the system administrator, network equipment installer, or network  
manager who is responsible for installing and managing the network hardware. It assumes a  
working knowledge of network operations, but it does not assume prior knowledge of 3Com  
internetworking equipment.  
NOTE: If the information in the release note shipped with your software differs from the  
information in this guide, follow the release note.  
How to Use This Guide  
The following list shows where to find specific information. Refer to the documentation  
roadmap in the front of this manual for information on related manuals.  
If you are looking for:  
Turn to:  
Installation procedure  
Chapter 1  
Chapter 2  
Appendix A  
Appendix B  
Troubleshooting and maintenance information  
Description of the HSSI module components  
Technical support information  
Conventions  
“Enter” vs. “Type”  
When the word “enter” is used in this manual, it means type  
something, then press the Return key. Do not press the  
Return key when an instruction simply says “type.”  
Text represented as  
screen display  
This typeface is used to represent displays that  
appear on your terminal screen and commands that you  
enter, for example:  
setd !3 -path cl = e  
Bold vs. plain text in  
procedures  
Bold text summarizes the task you must perform. Plain text  
provides additional information, for example:  
3.  
Assign a name to port 1.  
Use a name that is easy to remember.  
v
 
Keys  
When specific keys are referred to in the text, they are  
called out by their labels, such as “the Return key” or “the  
Escape key,” or they may be shown as [Return] or [Esc].  
If two or more keys are to be pressed simultaneously, the  
keys are linked with a plus sign (+), for example:  
Press [Ctrl]+[Alt]+[Del].  
Italics  
Italics are used to denote new terms or emphasis.  
Special Messages  
A special format indicates notes, cautions, and warnings. These messages are defined as  
follows.  
NOTE: Notes call attention to important features or instructions.  
CAUTION: Cautions contain directions that you must follow to avoid immediate system  
damage or loss of data.  
WARNING: Warnings contain directions that you must follow for your personal safety. Follow  
all instructions carefully.  
vi  
 
Chapter 1  
Installation  
®
This chapter describes how to install the HSSI module into the NETBuilder II base system.  
The HSSI module provides a single serial interface for a WAN connection in the NETBuilder II  
base system. It supports transmission rates up to OC1, including E3, T3, and sub-rates.  
NOTE: The HSSI module must be used with NETBuilder II HSSI and Single-Mode FDDI  
Software 6.2. For information about the software, see the NETBuilder II HSSI and Single-  
Mode FDDI Software 6.2 Release Notes.  
Before Installing the HSSI Module  
Before you install the HSSI module into the NETBuilder II base system, follow these steps:  
1. Observe appropriate ESD precautions.  
Electrostatic discharge (ESD) can damage circuit board components. Failures resulting  
from ESD may not be covered under your warranty. To prevent this, follow these handling  
procedures:  
Keep the HSSI module in its antistatic shielded bag until you are ready to install it.  
Do not touch pins, leads, or solder connections on the board.  
Handle the board by the edges only.  
Store or ship the HSSI module in static-protective packaging.  
Observe proper grounding techniques when handling the HSSI module: Use a foot strap  
and grounded mat, or wear a grounded static discharge wrist strap.  
2. Inspect the HSSI module for shipping damage.  
If you find any damage, contact the shipping company to file a report. If the assembly  
must be returned to your network supplier, ship it in its original shipping carton. If the  
original carton was damaged in shipment, repack the system in a carton that provides  
equivalent protection.  
 
 
1-2  
Installation  
Before Installing the HSSI Module  
3. Verify that you have received all the contents.  
When you purchase the HSSI module, you receive the following:  
HSSI module  
NETBuilder II HSSI Module Installation Guide  
If an item is missing from an undamaged carton, contact your network supplier to secure a  
replacement.  
®
HSSI Module  
NETBuilder II  
Installation Guide  
A member of the NETBuilder family  
For 3Com User Group Information  
1-800-NET-3Com  
or your local 3Com office  
Manual Part No. 09-0489-000  
Published January, 1994. Printed in the U.S.A.  
4. Write down the serial number and the MAC address from the label on the  
component side of the HSSI module on the following line:  
Serial number label  
Serial number example: S/N:1BK12345  
MAC address example: 0800021A4B5C  
You will need this information if you have to contact your network supplier.  
The MAC address is also encoded in the HSSI module’s EEPROM. Use the procedure in  
Appendix B, “Displaying the MAC Address,” to display the MAC address encoded in the  
EEPROM.  
 
Installation  
1-3  
Installing the HSSI Module  
Installing the HSSI Module  
Use this procedure to install the HSSI module into the NETBuilder II base system. You will  
need a small flathead screwdriver.  
NOTE: There are two versions of the NETBuilder II 4-slot and 8-slot chassis. The older, single-  
wide versions of the NETBuilder II 4-slot and 8-slot chassis have two flipper ejectors for each  
module. The newer, dual-wide versions have one flipper ejector for each module, except for the  
top slot which is reserved for the CEC module. When the term “dual-wide NETBuilder II  
chassis” is used in this manual, it refers to a chassis with only one flipper ejector per module.  
1. Select an I/O slot in which to install the HSSI module.  
You can install the module in any available I/O slot in the rear of the NETBuilder II base  
system. The top slot is designated for the CEC module only.  
2. Remove the blanking plate from the I/O slot you have selected for the HSSI module.  
CEC slot  
1
2
3
4
8
7
6
5
I/O slots  
(8)  
1
Loosen captive screws  
(with screwdriver if necessary)  
2
Push flipper  
ejector(s) open  
3
Slide blanking plate  
out of rear panel  
CAUTION: Only remove the blanking plate from an I/O slot that will house an I/O module. All  
unused I/O slots require blanking plate covers to maintain proper cooling of the unit and  
regulatory compliance. Failure to cover open slots can result in overheating of the NETBuilder  
II base system and voiding of the warranty.  
 
1-4  
Installation  
Installing the HSSI Module  
3. Insert the HSSI module into an uncovered I/O slot.  
Make sure the flipper ejector(s) are in an open position.  
Flipper  
open  
Flipper  
closed  
With the connector end toward the backplane and the board facing up (check that the  
labels on the connector/LED panel are right side up), grasp the left and right sides of the  
panel and fit the board into the I/O slot opening along the guide rails.  
4. Lock the board in the slot.  
For the dual-wide NETBuilder II chassis, use your thumbs to push the board all the way  
into the slot. As you slide the board into the slot, the flipper ejector engages itself. For  
single-wide NETBuilder II chassis, push the flipper ejector closed.  
1
2
3
4
8
7
6
5
Push board into slot  
5. Check that the connector/LED panel of the newly inserted module is flush with the  
NETBuilder II chassis.  
To verify that the board is seated correctly, check that it is aligned with the connector/LED  
panel of an installed module.  
6. Hand tighten the captive screws. Do not use a screwdriver.  
A solid connection of the connector/LED panel to the chassis is required for proper  
operation. Do not use the screws to force the board into place.  
 
Installation  
1-5  
Installing the HSSI Module  
Cabling the HSSI Module for Network Connection  
A SCSI-type cable connects the HSSI Module DTE connector to a Data Service Unit (DSU).  
Table 1-1 describes the connectors. Table 1-2 describes the pin assignments.  
3Com recommends using minimum lengths of this cable, especially if you plan to use these  
serial lines at high speeds. The maximum cable length allowed is 50 feet.  
To connect the HSSI module to the network, insert a SCSI type cable into the female connector  
in the rear of the HSSI module  
Table 1-1. Connectors  
Connector  
Description  
Plug connector type 2 row, 50 pin, shielded tab connectors,  
AMP plug part number 749111-4 or equivalent  
AMP shell part number 749193-2 or equivalent  
Receptacle type  
2 row, 50 pin, receptacle header with rails and latch blocks,  
AMP part number 749075-5 or equivalent  
Table 1-2. HSSI Adapter Cable Pinouts  
Signal Name  
Mnemonic Pin Number  
(+ side)  
Pin Number  
(- side)  
Direction  
Signal Ground  
Receive Timing  
DCE Available  
Receive Data  
SG  
RT  
CA  
RD  
LC  
ST  
1
26  
--  
2
27  
in  
3
28  
in  
4
29  
in  
Loopback Request  
Send Timing  
5
30  
in  
6
31  
in  
Signal Ground  
DTE Available  
Terminal Timing  
SG  
TA  
TT  
7
32  
--  
8
33  
out  
out  
out  
out  
out  
--  
9
34  
Loopback Circuit A LA  
Send Data SD  
Loopback Circuit B LB  
10  
35  
11  
36  
12  
37  
Signal Ground  
SG  
SG  
SG  
13  
38  
5 ancillary to  
DCE  
14 - 18  
39 - 43  
out  
Signal Ground  
19  
44  
--  
5 ancillary from  
DCE  
20 -24  
45 - 49  
in  
Signal Ground  
25  
50  
--  
 
1-6  
Installation  
Installing the HSSI Module  
CAUTION: Connections between 3Com equipment and other equipment and peripherals must  
be made using shielded cables in order to maintain compliance with FCC, and other agency  
radio frequency emissions limits. All interconnection cables should be equipped with shielded  
connectors. The backshells of these connectors must completely surround the cable shield.  
Internal Loopback test  
An internal loopback test is performed automatically when you insert the HSSI module into the  
NETBuilder II chassis. A successful loopback test is indicated by the following example  
message:  
3Com Corporation NETBuilder II power-on  
IPL1: 1.0.5, REM: 1.0.5  
Booting from floppy...  
Decompressing...  
Booting complete  
HSSI Interface: Self Tests passed - slot 1  
PHY_CONTROLLER: Self Tests passed - slot 3  
MAC CONTROLLER: Self Tests passed - slot 4  
FDDI Started. MAC[4] PHY[3]  
Wed Dec 31 16:00:06 1969 Path 4 AVAILABLE  
Wed Dec 31 16:00:06 1969 Path 1 AVAILABLE  
Wed Dec 31 16:00:06 1969 Path 2 AVAILABLE  
Wed Dec 31 16:00:06 1969 Path 2 UP  
Fri Sep 10 16:50:06 1993 System Initialized and Running  
Fri Sep 10 16:50:06 1993 Path 4 UP  
Fri Sep 10 16:50:17 1993 Path 1 UP  
Fri Sep 10 16:50:35 1993 Port 2 - Forwarding State  
Fri Sep 10 16:50:36 1993 Port 4 - Forwarding State  
Fri Sep 10 16:50:56 1993 Port 1 - Forwarding State  
the appropriate action to take.  
Hotswap  
When you hotswap an HSSI module in a running system, the following is displayed:  
HSSI Interface: Self Tests passed - slot 1  
Wed Dec 31 16:00:06 1969 Path 1 AVAILABLE  
Fri Sep 10 16:50:17 1993 Path 1 UP  
 
Chapter 2  
Troubleshooting and Maintenance  
This chapter describes how to troubleshoot and maintain the HSSI module.  
If you are unable to resolve a problem with your HSSI module, you will need to contact a  
customer service representative. Refer to Appendix C, “Technical Support,” for information  
about who to contact in your area.  
Troubleshooting Startup Problems  
The following symptom indicates a self-test failure at startup. For complete information on  
configurable firmware parameters, refer to the NETBuilder Family Bridge/Router Guide,  
Version 6.2 or later.  
Symptom  
The following message is displayed:  
HSSI Interface: Self Tests failed - slot X  
The value of X can be 1 through 4 or 1 through 8, depending on whether you have a 4-slot or an  
8-slot NETBuilder chassis.  
Action  
Check to see if the card is inserted completely into the NETBuilder II chassis.  
Maintaining the HSSI Module  
This section describes preventive maintenance you can take and how to replace the HSSI  
module.  
Preventive Maintenance  
3Com recommends the following procedures for preventive maintenance:  
Observe the guidelines in Appendix A of the NETBuilder II Base System Installation  
Guide for minimum and maximum electrical and environmental requirements.  
Keep the area around the NETBuilder II base system clean and avoid accumulated dust.  
Allow sufficient air space around the NETBuilder II base system for proper ventilation.  
This protects the HSSI module from excessively high temperatures.  
Observe ESD guidelines whenever handling the HSSI module.  
Refer to Chapter 5 of the NETBuilder II Base System Installation Guide for preventive  
maintenance tips that apply to the entire system.  
 
 
2-2  
Troubleshooting and Maintenance  
Maintaining the HSSI Module  
Replacing the HSSI Module  
If any component in the HSSI module fails, you will need to replace the entire module. The  
HSSI module can be hot-swapped, which means that you can safely remove and install a new  
one without turning off or rebooting the NETBuilder base system. To perform the following  
procedure, you may need a small flathead screwdriver.  
To replace the module, follow these steps to remove the HSSI module:  
1. Disconnect any network cabling from the HSSI module, and remove the cable from  
the strain relief bracket.  
You do not need to remove the bracket.  
2. Unscrew the two captive screws that anchor the board in the slot until they disengage  
from the chassis. Do not remove the screws from the I/O panel.  
Use a screwdriver to loosen the screws, if necessary.  
NOTE: If you have a dual-wide NETBuilder II chassis, skip step 3.  
3. Release the ejector handles on both sides of the board by pushing the handles apart.  
The board will disengage from the NETBuilder II backplane and partially eject from the  
slot.  
4. For the dual-wide NETBuilder II chassis, use one hand to disengage the flipper  
ejector by pulling it back, and simultaneously use the other hand to pull on the  
anchoring screw on the opposite side of the I/O panel.  
5. Use both hands to grasp the board and gently pull it from the slot.  
6. Install the new HSSI module using the procedures outlined in Chapter 1,  
 
Appendix A  
HSSI Module Components  
This appendix describes the HSSI module components and gives the specifications of the  
board. The following figures show the major components and the connector/LED panel.  
Status LED  
CA LED  
TX LED  
Connector  
Backplane  
connector  
to NETBuilder II  
TX  
CA  
HSSI  
®
STATUS  
LEDs  
The following table explains the states of the three LEDs.  
Table A-1. LED states  
LED  
Normal  
Color  
Indicates  
Behavior  
TX  
CA  
on  
on  
green  
green  
packets forwarding  
CSU available  
STATUS on  
green  
off  
normal operation  
module disabled  
self-test  
yellow  
red  
fault  
 
 
A-2  
HSSI Module Components  
Connectors  
Connectors  
There are 4 connectors on the HSSI module.  
Table A-2. HSSI Module Connectors  
Location  
Connector  
Number of pins  
Purpose  
Backplane Connector: J1 and J3  
48-pin  
connects module to  
the core bus  
J2  
8-pin  
power connector  
Front LED/connector 50-pin SCSI II  
panel:  
50-pin  
connects module to  
HSSI interface  
Specifications  
The following table lists the physical dimensions of the HSSI module.  
Table A-3. Physical Dimensions  
Attribute  
Length  
Width  
Description  
8.8 in (22.25 cm)  
3.9 in (9.9 cm)  
0.6 in (1.5 cm)  
0.6 lbs (0.26 kg)  
Height  
Weight  
The following table lists the maximum current consumption of the HSSI module  
Table A-4. Maximum Current Consumption  
+5 Volts  
+12 Volts  
2.0 amps  
0.4 amps  
 
Appendix B  
Displaying the MAC Address  
After you have installed the HSSI module, use this procedure to display the MAC address.  
This method of accessing the monitor can be done only from the bridge/router software. To find  
out about other methods of accessing the monitor utility, refer to the NETBuilder Family  
Bridge/Router Guide.  
NOTE: Using the MONitor command halts the normal operation of the bridge/router software.  
1. To access the monitor utility, enter the following command at the network manager  
prompt (#):  
mon  
The following message appears:  
WARNING: Monitor mode halts normal operation. Confirm (Y/N)  
2. Type Y.  
The following message appears:  
3Com Corporation NETBuilder II Monitor  
The angle bracket (>) prompt indicates you are in monitor mode.  
3. Enter the following command to display the System Information menu:  
si  
The following is displayed:  
System Information  
1. Display System Information Summary  
2. Display Repair Data  
3. Display I/O Module Information  
Enter display number or press Q to quit:  
4. Type 3 to access the MAC address of the HSSI module.  
The Assigned MAC addresses field lists the MAC address that has been assigned to the  
interface on the I/O module.  
This display is a few screens long. Once the first screen is displayed, press the Return key  
to display the next screen. You may press the ESC key to exit this display.  
 
 
B-2  
Displaying the MAC Address  
5. When you are finished with the display of I/O module information, type G.  
This will exit the monitor mode and return you to the bridge/router software interface.  
 
Appendix C  
Technical Support  
3Com provides easy access to technical support information through a variety of services. This  
appendix describes these services.  
Automated Fax Service  
3Com’s interactive fax service, 3ComFactsSM, provides technical information on 3Com  
products 24 hours a day, seven days a week. To access this service, dial 1-(408)-727-7021 from  
anywhere in the world using your touch tone telephone. In Europe, call (44) 442 278279.  
Free local access is available within the following countries by using the numbers listed:  
France  
Germany  
Italy  
Netherlands  
Sweden  
U.K.  
05 90 81 58  
0130 81 80 63  
1678 99085  
06 0228049  
020 792954  
0800 626403  
Within this service, you may choose to access CardFactsSM, containing adapter information, or  
NetFactsSM, containing network system product information.  
CardFacts provides adapter installation diagrams, configuration drawings, troubleshooting  
instruction, and technical articles. Document 9999 provides you with an index of adapter  
documents.  
NetFacts provides data sheets and technical articles on 3Com’s hub, bridge, router,  
terminal server, and software products. Document 8888 provides you with an index of  
system product documents.  
On-line Technical Services  
You can access the following on-line services for software updates, drivers, technical tips, and  
product information.  
3Com Product Information Service  
Ask3ComSM is a CompuServeSM-based service containing patches and drivers, technical articles  
about all 3Com products and an interactive forum for technical questions. To use Ask3Com,  
you need a CompuServe account. Log in to CompuServe, type GO THREECOM and press  
[Enter] to see the Ask3Com main menu.  
 
 
C-2  
Technical Support  
3Com Documentation on CD-ROM  
Adapter-Specific Bulletin Board System (BBS)  
This private BBS, called CardBoardSM, contains patches and drivers for 3Com adapter products,  
as well as technical articles. To access CardBoard, call the CardBoard telephone number  
nearest to your location:  
France  
(33) (1) 69 86 69 54  
Modem set up to 9600 baud, 8 data bits, no parity, 1 stop bit.  
Germany (49) 89 62732-188 or (49) 89 62732-189  
Modem set up to 9600 baud, 8 data bits, no parity, 1 stop bit.  
Italy  
(39) (2) 27 30 06 80  
Modem set up to 9600 baud, 8 data bits, no parity, 1 stop bit.  
U.K. (44) (0) 442 278278  
Modem set up to 9600 baud, 8 data bits, no parity, 1 stop bit.  
U.S. (1) (408) 980-8204  
Modem set up to 14400 baud, 8 data bits, no parity, 1 stop bit.  
3Com Documentation on CD-ROM  
An extensive library of 3Com product documentation is available in CD-ROM format through  
Support On-Site for Networks™ subscription service. This multivendor CD-ROM service,  
offered by Computer Library, a division of Ziff Communication, contains technical information  
and documentation from major data networking hardware and software manufacturers. Stand-  
alone and concurrent user subscriptions are available. For more information, call Computer  
Library at (800) 827-7889, extension 515. Outside the U.S., call (212) 503-4400 or use fax  
number (212) 503-4487.  
Warranty Information  
3Com’s warranty varies by product. For warranty information on your product, refer to your  
purchase agreement. If you are a non-contracted end customer, refer to the warranty card  
accompanying the product, or contact your authorized 3Com network supplier for assistance.  
Additional Technical Support Services  
Additional information about obtaining technical support follows, broken down into three  
sections:  
U.S. and Canada  
Europe and Africa  
Australia, New Zealand, Asia, Japan, Central America, and South America  
Refer to the section that contains information relevant to your location.  
U.S. and Canada  
Authorized 3Com network suppliers are qualified to provide network planning, installation,  
hardware maintenance, application training, and support services. Many 3Com network  
suppliers are uniquely qualified to provide on-site services for products from multiple vendors.  
Contact your 3Com network supplier first for assistance. If you do not know who this is,  
 
Technical Support  
C-3  
Additional Technical Support Services  
contact your nearest 3Com sales office. To find the 3Com sales office nearest you, call  
1-800-NET3Com (638-3266).  
Before ContactingYour Network Supplier  
Before you talk to your network supplier, make sure that you have detailed information about  
the problem, including:  
A complete description that includes:  
The sequence of events or actions that led to the problem  
The nature, symptoms, and duration of the problem  
The system components involved  
Whether or not you can reproduce the problem  
A list of all the 3Com products you have, including:  
Hardware models and serial numbers  
Software part numbers and revision levels  
A list of all other products involved in the problem, including:  
Hardware products (types and model numbers) such as personal computers,  
monitors, fixed disks, and modems  
Software products, including operating systems and applications  
A list of all recent system configuration changes, including:  
Hardware  
Operating system and application software  
Network and system administration procedures  
Your network supplier will determine what action needs to be taken to resolve the problem.  
Returning Products for Repair  
If you need to have a product repaired, local 3Com authorized service partners are good sources  
for quality repairs and spare parts. However, a situation may arise in which you need to return a  
product directly to 3Com for service. Before doing this, you must obtain a Return Materials  
Authorization (RMA) number.  
Obtaining an RMA Number. To obtain an RMA number, contact 3Com Customer Repair  
Services at 800-876-3Com. If you have a touch-tone phone, select hardware repair, option #2.  
If you do not have a touch-tone phone, remain on the line for assistance. You also can fax your  
repair request to 3Com at 408-764-7120. In order to obtain an RMA number, you must provide  
the following information:  
Name and phone number of technical contact at your company  
Company name  
Company shipping address  
Product name  
Model and serial numbers of the main unit  
Failed subassembly name and serial number, if applicable  
 
C-4  
Technical Support  
Additional Technical Support Services  
Failure symptoms with diagnostic error messages, if applicable  
Proof of purchase for warranty repairs  
If you send a product to 3Com for repair without an RMA number displayed clearly on the  
outside of the box, it will be returned to you unopened.  
Paying for Repairs. You may pay for repairs by C.O.D., MasterCard®, or VISA®. Terms are  
available only if you have prearranged a special authorization with the 3Com credit department  
and you enclose a copy of the purchase order with the equipment.  
3Com reserves the right to charge for “no problem found,” regardless of the product warranty  
status.  
Packing and Shipping Products to 3Com. To ensure the safe arrival and speedy repair of your  
equipment, follow these packing and shipping guidelines:  
Package carefully, using the original container if possible.  
Wrap controller boards and adapters in antistatic material.  
Do not include cables, software, or documentation.  
Include any problem diagnostic information.  
Include a packing list, purchase order, and other repair documentation.  
Print the RMA number clearly on the outside of the box. (If you send a product to 3Com  
for repair without an RMA number displayed clearly on the outside of the box, it will be  
returned to you unopened.)  
Prepay the shipping costs to 3Com.  
Ship your products to:  
3Com Corporation  
5400 Bayfront Plaza  
RMA Receiving, Attention: RMA (your RMA number)  
Santa Clara, CA 95052-8145  
3Com returns products by air freight, priority 2, and pays all return shipping costs.  
Repair Timeframes. Repairs may take up to thirty (30) working days in-house. A 24-hour  
turnaround option, which includes priority 1 return air freight, is available for an additional  
expedite charge.  
Additional 3Com Support Services  
If you want to supplement your network supplier’s service, 3Com offers a variety of technical  
support services including:  
Network Integration Service, a set of professional services that can assist you with  
large-scale, complex projects  
Annual on-site support contracts  
Annual hardware maintenance contracts  
Technical support service by telephone  
 
Technical Support  
C-5  
Additional Technical Support Services  
Factory repair service  
Spare parts  
Software update service  
You can receive information about these programs and services from your authorized 3Com  
network supplier or directly from 3Com by calling 1-800-NET-3Com or the 3Com sales office  
nearest you.  
Europe and Africa  
Authorized 3Com network suppliers often are equipped to provide repair service. Contact your  
network supplier first for assistance. If your equipment needs repairs that are not available from  
your network supplier, or if you purchased your equipment directly from 3Com, you or your  
network supplier usually will send the equipment to the 3Com Europe repair center in England.  
Equipment Warranties and Repair Services  
3Com’s warranty varies by product. For warranty information on your product, refer to your  
purchase agreement. If you are a non-contracted end customer, refer to the warranty card  
accompanying the product, or contact your authorized 3Com network supplier for assistance.  
3Com Europe offers a 30-day exchange/repair service (in-house) for most products. A  
standard charge is made on all items returned for exchange or repair when the product’s  
warranty has expired, whether or not the item is found to be faulty.  
When you send items to 3Com Europe for repair, you are responsible for paying all shipping or  
freight charges. 3Com Europe pays all return freight charges.  
3Com Europe may exchange your equipment for an identical part. If you require that your  
original equipment be repaired rather than exchanged, please note this on the documents you  
send with your equipment.  
Returning Products for Repair  
Before you return any product for repair, contact 3Com’s European Repair Services by phone  
or fax with your purchase order or reference number, and include shipping and flight  
information with the shipping date.  
Phone: (44) 44 2 278 125  
Fax: (44) 44 2 236 824  
The account administrator for your country will assist you with your repair needs.  
PreparingYour Equipment for Shipment  
To ensure that your equipment arrives without damage and can be traced through the repair  
process, please prepare it in the following manner:  
Attach a reference number to equipment that is under warranty.  
Include a purchase order for the repair work if the equipment is not under warranty.  
 
C-6  
Technical Support  
Additional Technical Support Services  
Make sure that the packing list you include with your equipment has the following  
information on it:  
Reference number you assigned to the equipment (for equipment under warranty)  
Model, item, or part number  
Unit or board serial number (for warranty repairs only)  
Proof of purchase (for end customer warranty repairs)  
Fault diagnosis attached to each unit  
Pack equipment carefully.  
Enclose all network adapters and units that have exposed boards in Faraday cage-type  
shielding material to prevent electrostatic damage.  
Send equipment to:  
European Repair  
3Com Europe Ltd.  
ISOLAN House  
Brindley Way  
London Road  
Hemel Hempstead  
Hertfordshire  
HP39 XJ England  
If you are sending equipment from outside England, please contact European Repair Services  
to determine your nearest logistics centre.  
Australia, New Zealand, Asia, Japan, Central America, and  
South America  
3Com’s warranty varies by product. For warranty information on your product, refer to your  
purchase agreement. If you are a non-contracted end customer, refer to the warranty card  
accompanying the product, or contact your authorized 3Com network supplier for assistance.  
Authorized 3Com network suppliers are qualified to provide network planning, installation,  
hardware maintenance, application training, and support services. Contact your 3Com network  
supplier first for assistance. If you do not know who this is, contact your nearest 3Com sales  
office.  
For Australia and New Zealand:  
3Com Intercontinental sales office (Sydney, Australia) 61 2 9593020  
For Asia:  
3Com Asia, Ltd.  
Hong Kong office 852 8489200  
Singapore office 65 3218929  
Taiwan office 886 2 7754352  
For Japan:  
3Com KK (81) 3 3243-9234  
For Central America and South America:  
Icon Support in the U.S. (fax) 408 7645742  
 

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