Installing the
®
SuperStack® II NETBuilder®
Token Ring and FRAD
Bridge/Router
Models 32x and 52x
http://www.3com.com/
Part No. 09-0848-003
Published May 1997
3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
Copyright ©
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from 3Com Corporation.
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.
3Com may make improvements or changes in the product(s) and/or the program(s) described in this
documentation at any time.
UNITED STATES GOVERNMENT LEGENDS:
If you are a United States government agency, then this documentation and the software described herein
are provided to you subject to the following restricted rights:
For units of the Department of Defense:
Restricted Rights Legend:
forth in subparagraph (c) (1) (ii) for Restricted Rights in Technical Data and Computer Software Clause at 48
C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara, California 95052-8145.
For civilian agencies:
Restricted Rights Legend:
(a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and
the limitations set forth in 3Com Corporation’s standard commercial agreement for the software.
Unpublished rights reserved under the copyright laws of the United States.
If there is any software on removable media described in this documentation, it is furnished under a license
agreement included with the product as a separate document, in the hard copy documentation, or on the
removable media in a directory file named LICENSE.TXT. If you are unable to locate a copy, please contact
3Com and a copy will be provided to you.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may
not be registered in other countries.
3Com, NETBuilder, and SuperStack are registered trademarks of 3Com Corporation. 3TECH is a trademark
of 3Com Corporation. 3ComFacts is a service mark of 3Com Corporation.
CompuServe is a registered trademark of CompuServe, Inc. IBM is a registered trademark of International
Business Machines Corporation. AppleTalk is a registered trademark of Apple Corporation. Banyan and
VINES are registered trademarks of Banyan Systems. UNIX is a registered trademark in the United States and
other countries, licensed exclusively through X/Open Company Limited. XNS is a trademark of Xerox
Corporation. Siemens and EWSD are registered trademarks of Siemens Aktiengesellschaft. AT&T and 5ESS
are registered trademarks of American Telephone and Telegraph. DMS is a registered trademark of Nothern
Telecom Limited.
Other brand and product names may be registered trademarks or trademarks of their respective holders.
Guide written by Ramona Boersma. Edited by Amy Guzules. Technical illustration by Debra Knodel.
Production by Ramona Boersma.
3Com Corporation, 1997.
Use, duplication, or disclosure by the Government is subject to restrictions as set
Use, reproduction, or disclosure is subject to restrictions set forth in subparagraph
All rights reserved. No part of this documentation may be
Electromagnetic Compatibility Information
Classes
Various national agencies (in the United States, The Federal Communications Commission (FCC)) govern the
levels of electromagnetic emissions from digital devices. Electromagnetic emissions can interfere with radio
and television transmission. To reduce the risk of harmful interference these agencies have established
requirements for manufacturers of digital devices
The manufacturer of a digital device must test and label a product to inform an end-user of the maximum
emission level from the product when used in accordance with its instructions. The emission levels
encountered are classified as Class A or Class B. A system that meets the Class A requirement can be
marketed for use in an industrial or a commercial area. A system that meets the more stringent Class B
requirement can be marketed for use in a residential area in addition to an industrial or a commercial area.
The end user is generally held responsible for ensuring that his system is suitable for its environment as
stated in the above paragraph and bears the financial responsibility for correcting any harmful interference.
ii
Modifications
Modifications or changes made to this device, and not approved by 3Com, may void the authority granted
by the FCC, or other such agency, to operate this equipment.
Shielded Cables
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, electromagnetic frequency emissions
limits. This statement does not apply to the ISDN cable or 10BASE-T cables.
Federal Communications Commission Notice
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses and can create radio frequency energy and, if not installed and used inaccordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area can cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Canadian Notice
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set
out in the interference-causing equipment standard entitled “Digital Apparatus,” ICES-003 of the
Department of Communications.
Avis Canadien
Cet appareil numérique respecte les limites bruits radioélectriques applicables aux appareils numériques de
Classe A prescrites dans la norme sur le matériel brouilleur: “Appareils Numériques”, NMB-003 édictée par
le ministre des Communications.
Japanese Notice
Type Approval Information
This apparatus has been approved for use for connection to the following public telecommunication
services: ISDN basic access, X.25 (V.24, V.36, and X.21), X.21 leased lines, X.21bis leased lines (V.24 and
V.36). Any other usage will invalidate the approval of the apparatus if as a result it then ceases to conform
against the standards against which approval was granted.
Notice
The Industry Canada label identifies certified equipment. This certification means that the equipment meets
certain telecommunications network protective, operational, and safety requirements. The Department
does not guarantee the equipment will operate to the users’ satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities
of the local telecommunications company. The equipment must also be installed using an acceptable
method of connection. In some cases, the inside wiring associated with a single line individual service may
be extended by means of a certified connector assembly. The customer should be aware that compliance
with the above conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated
by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions,
may give the telecommunications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of the power utility,
telephone lines, and internal metallic water pipe system, if present, are connected together. This precaution
may be particularly important in rural areas.
CAUTION:
contact the appropriate inspection authority or an electrician, as appropriate.
Users should not attempt to make electrical ground connections by themselves, but should
iii
CE Notice
Marking by the following symbol indicates compliance of this equipment with the
EMC and Telecom Directives of the European Community. Such marking is indicative that this equipment
meets or exceeds the following technical standards:
EN 55022
■
technology equipment.
EN 50082-1
■
commercial, and light industrial.
I-CTR2
■
■
I-CTR3
— Limits and methods of measurement of radio interference characteristics of information
— Electromagnetic compatibility – generic immunity standard part 1: residential,
— For connection to X.25 packet switched services and X.21 leased lines.
— For models with ISDN interfaces: connection to basic rate ISDN services.
iv
C
ONTENTS
BOUT THIS GUIDE
A
Conventions 1
1
I
NSTALLING THE HARDWARE
Required Equipment 1-1
Mounting 1-3
Rack-Mount Kit 1-3
Installing on a Tabletop 1-3
Stacking with Brackets 1-4
Installing in a Rack 1-4
Cabling the Connectors 1-5
Cabling the LAN Connector (Models 323, 327, and 52x) 1-6
Cabling the ISDN Connector (Model 52x) 1-6
Cabling the Serial Connectors 1-7
Models 32x (DTE mode) 1-8
Models 32x (DCE-like mode) 1-8
Models 52x (DTE mode) 1-9
Models 52x (DCE-like mode) 1-9
Attaching a Redundant Power System 1-10
Connecting a PC, Terminal, or Modem 1-11
Shutting Down 1-12
2
VERVIEW
O
Model Features 2-1
Chassis Panels 2-1
LEDs 2-3
Hardware Interrupt Switch 2-3
v
Connectors and Cables 2-3
Console Cables 2-3
PC Cable 2-4
Terminal Cable 2-5
Modem Cable 2-6
LAN Connectors and Cables 2-6
UTP Connector and Cable 2-6
STP Connector and Cable 2-7
Cabling Standards 2-8
Serial Cables 2-9
V.35 to V.35 DCE Cable (32x) 2-9
V.35 to V.35 Direct Connect Cable (32x) 2-10
UNIVERSAL to V.35 Adapter Cable 2-11
UNIVERSAL to V.35 Direct Connect Cable 2-12
UNIVERSAL to RS-449/V.36 DCE Cable 2-13
UNIVERSAL to RS-449/V.36 Direct Connect Cable 2-14
UNIVERSAL to RS-232 DCE Cable 2-15
UNIVERSAL to RS-232 Direct Connect Cable 2-16
RS-232 to RS-232 DCE Cable 2-17
RS-232 to RS-232 Direct Connect Cable 2-18
UNIVERSAL to X.21 Adapter Cable 2-19
ISDN Cable (Model 52x ) 2-20
Physical Specifications 2-21
3
4
vi
PGRADING MEMORY
U
Removing the Cover 3-1
Installing Memory 3-2
Reinstalling the Cover 3-3
ROUBLESHOOTING
T
Troubleshooting During the Test Phase 4-2
Troubleshooting During the Load Phase 4-2
LED Meanings 4-3
Troubleshooting the Token Ring Connection 4-4
A
ROVISIONING YOUR
P
Ordering North American ISDN BRI Services A-1
North American Switch Provisioning Tables A-3
AT&T 5ESS Switch A-4
AT&T 5ESS Custom Switch A-5
DMS 100 and National ISDN A-6
Siemens EWSD Switch A-7
SPIDs A-7
NT1s and Power Supplies A-8
Ordering German ISDN BRI Services A-9
ISDN L
INE
B
ECHNICAL SUPPORT
T
Online Technical Services B-1
World Wide Web Site B-1
3Com Bulletin Board Service B-1
Access by Analog Modem B-2
Access by Digital Modem B-2
3ComFacts Automated Fax Service B-2
3ComForum on CompuServe Online Service B-3
Support from Your Network Supplier B-3
Support from 3Com B-4
Returning Products for Repair B-5
I
NDEX
3COM C
ORPORATION LIMITED WARRANTY
vii
viii
A
BOUT
T
HIS
G
UIDE
Conventions
This guide includes complete hardware installation and cabling
information for your SuperStack
32x or 52x.
This guide is for the following audience:
■
Inexperienced end users configuring their first internetworking
device
■
Experienced network administrators who are configuring the central
node as well as the peripheral node (boundary router)
■
Experienced system integrators
If the information in the release notes shipped with your product differs
from the information in this guide, follow the release notes.
Table 1 provides a list of notice icons that are used throughout this
guide.
Table 1
Icon
Notice Icons
Notice Type Alerts you to...
Information note
®
II NETBuilder® bridge/router model
Important features or instructions
Caution Risk of personal safety, system damage, or loss
Warning Risk of severe personal injury
of data
HAPTER
2
C
BOUT THIS GUIDE
: A
1
I
NSTALLING THE
This chapter describes how to install your SuperStack II NETBuilder
bridge/router.
H
ARDWARE
Required Equipment
Table 1-1
Shipping carton
contents
What you need to
provide
(continued)
Equipment Received and Equipment Needed
Table 1-1 lists the items you receive in the shipping carton and items
you need to provide.
SuperStack II NETBuilder bridge/router
Power cable
Rack-mount kit
*
Software CD-ROM
Documentation and documentation CD-ROM
NETBuilder Upgrade Utilities CD-ROM (models 320, 327, and 527 only)
Unshielded twisted pair (UTP) or shielded twisted pair (STP) cable for LAN connection
(Models 323, 327, 523, and 527 only)
Integrated Services Digital Network (ISDN) cable for ISDN connection (Model 52x only)
A cable (3Com® part number 3C8101) to connect to a SuperStack II Redundant Power
System (RPS).
Terminal, PC, or modem and cable
(models 320, 327, and 527 only)
1-2
HAPTER
C
NSTALLING THE HARDWARE
1: I
Table 1-1
What you need to
provide
* The software is preinstalled in the flash memory drive of the bridge/router and automatically loads when you turn on the
power. The software CD-ROM is for software recovery purposes only.
Equipment Received and Equipment Needed (continued)
(continued)
For serial connection, provide the following:
Channel service unit/digital service unit (CSU/DSU) device or modem if desired
Up to three of the following cables:
X.21 or V.35 adapter cable
UNIVERSAL connector to RS-449/V.36 data communications equipment (DCE) cable
UNIVERSAL to RS-232 DCE cable
UNIVERSAL to V.35 direct connect cable
UNIVERSAL to RS-232 direct connect cable
UNIVERSAL to RS-449/V.36 direct connect cable
RS-232 to RS-232 direct connect cable
V.35 to V.35 direct connect cable
V.35 to V.35 DCE cable
RS-232 to RS-232 DCE cable
WARNING:
To eliminate cable noise emission in excess of FCC
regulations, part 15, subpart J, and EN55022B, all interconnection
cables should be equipped with shielded connectors, the backshells of
which must completely surround the cable shield.
For more information on cables, refer to Chapter 2.
Mounting
1-3
Mounting
Rack-Mount Kit The rack-mount kit contains the following hardware:
Installing on a
Tabletop
You can mount your bridge/router on a tabletop, stack it, or mount it
in a rack.
Two rack-mount brackets
Six M4x10 mm Phillips flathead
machine screws for use
with rack-mount brackets
Two stacking brackets
Four M4x8 mm Phillips
panhead screws for use
with stacking brackets
Figure 1-1 Rack-Mount Kit Contents
If you plan to install your
bridge/router on a tabletop, attach
Four adhesive-backed
rubber feet
Attach feet to corners
of chassis bottom
the rubber feet as shown.
Flex plastic sheet until
feet pop loose
1-4 CHAPTER 1: INSTALLING THE HARDWARE
Stacking with
Brackets
The stacking brackets can be used to securely stack several
bridge/routers on a tabletop. Use the stacking brackets and the
M4x8 mm panhead stacking screws shown in Figure 1-1.
Attach brackets as shown
to lock two units together
Place screws in holes as shown
Bottom bracket acts as a support
Installing in a Rack To install the bridge/router in a rack, use the rack-mount brackets and
the M4x10 mm flathead rack-mount screws shown in Figure 1-1 and
follow these steps:
1 Secure the rack-mount brackets to each side of the chassis using three
flathead screws per bracket.
Cabling the Connectors 1-5
2 Hold the chassis between the poles of the rack and attach the brackets
to the rack using panhead screws (you must provide these screws).
Tighten each screw securely.
CAUTION: Using fewer than two screws to secure the brackets to the
rack may cause the boundary router to fall and sustain damage not
covered by the warranty.
Cabling the Connectors
This section describes how to cable the LAN, ISDN, and serial
connectors on your bridge/router.
If you are planning to connect your SuperStack II bridge/router directly
®
to another SuperStack II system or to a NETBuilder II
bridge/router
with an HSS V.35 3-port module installed, you must use a modem
eliminator between the two devices. Be sure the default setting of
External for the -PATH CLock parameter is maintained on each device.
Contact your 3Com supplier for a list of suggested modem eliminators.
1-6 CHAPTER 1: INSTALLING THE HARDWARE
LAN
16Mb
Active
Fault
UTP
STP
UTP
cable
OR
STP
cable
Cabling the LAN
Connector (Models
323, 327, and 52x)
Cabling the ISDN
Connector
(Model 52x)
This section applies to models 323, 327, and 52x only. You can use
only one type of LAN connector on each bridge/router. The following
figure shows how to cable a LAN connector.
For more information on AUI and 10BASE-T cables, refer to Chapter 2.
This section applies to model 52x bridge/routers only. The following
figure shows how to cable an ISDN connector.
LAN
UTP
STP
16Mb
Active
Fault
ISDN
B1
S/T
B2
Line
Link
Act
Connect
Line
Fault
Error
Wall outlet
ISDN cable
Network
termination
(nt1)/power
supply*
*required for U.S. and Canada only
The NT1 and power supply shown in the figure above must either be
leased from the telephone company or purchased from an ISDN
equipment vendor in the U.S. and Canada only. In other countries, you
do not need to provide this equipment because the function of the
equipment is provided by the ISDN switch. For more information about
ISDN, refer to Appendix A.
For more information on ISDN cables, refer to Chapter 2.
Cabling the Connectors 1-7
Cabling the Serial
Connectors
The serial connectors provide the following options:
■ The UNIVERSAL connector can be converted to a V.35, V.36, X.21,
RS-449, or RS-232 connector.
■ All serial connectors can function in either DTE or DCE-like mode,
which allows you to connect a serial connector to either a CSU/DSU
device or modem (DTE mode), or to an IBM cluster controller
(DCE-like mode). A connection to an IBM cluster controller must be
made using a permanent leased line only. You can operate the serial
connectors in any combination of DTE and DCE-like modes.
The cables you use determine the serial connector function. Table 1-2
lists the types of devices available for serial connections, cable options
for connection to each device, and if the cable is sold by 3Com. Cables
used for IBM cluster controller connectivity (DCE-like mode) are referred
to as direct connect cables.
Table 1-2 Serial Connector Cabling Information
Connector
*
Connection to Connector
V.35 CSU/DSU device or
modem
V.35 CSU/DSU device or
modem
V.35 IBM cluster controller V.35 DCE-like V.35 to V.35 direct connect
V.35 IBM cluster controller UNIVERSAL DCE-like UNIVERSAL to V.35 direct
X.21 CSU/DSU device or
modem
RS-449 or V.36 CSU/DSU
device or modem
RS-449 or V.36 IBM cluster
controller
RS-232 CSU/DSU device or
modem
RS-232 CSU/DSU device or
modem
RS-232 IBM cluster controller UNIVERSAL DCE-like UNIVERSAL to RS-232 direct
RS-232 IBM cluster controller RS-232 DCE-like RS-232 to RS-232 direct
*If you cable the UNIVERSAL connector, you need to perform some software configuration. For more information, refer to the
software guide.
V.35 DTE V.35 to V.35 DCE cable No. Easily obtained from
UNIVERSAL DTE V.35 adapter cable Yes (3C8035).
UNIVERSAL DTE X.21 adapter cable Yes (3C8021).
UNIVERSAL DTE UNIVERSAL to RS-449/V.36
UNIVERSAL DCE-like UNIVERSAL to RS-449/V.36
UNIVERSAL DTE UNIVERSAL to RS-232 DCE
RS-232 DTE RS-232 to RS-232 DCE cable No. Easily obtained from
Mode
Cable Name Sold by 3Com?
cable manufacturer.
cable
connect cable
DCE cable
direct connect cable
cable
connect cable
connect cable
No. See Chapter 2 for
pin assignments.
Yes (3C8135).
No. See Chapter 2 for
pin assignments.
No. See Chapter 2 for
pin assignments.
Yes (3C8023).
cable manufacturer.
Yes (3C8123).
Yes (3C8132).
1-8 CHAPTER 1: INSTALLING THE HARDWARE
The following figures show how to cable the serial connectors.
Models 32x (DTE mode)
V.35 (A)
UNIVERSAL (B)
V.35 DCE cable
V.35 adapter
X.21 adapter
RS-449/V.36 DCE
or RS-232 DCE cables
Models 32x (DCE-like mode)
V.35 (A)
UNIVERSAL (B)
SERIAL
SERIAL
RS-232 (C)
RS-232 DCE cable
B
RS-232 (C)
C
Link
Active
Fault
A
B
C
Console
Link
Active
Fault
SuperStack II
NETBuilder
Status
Console
SYSTEM
SuperStack II
NETBuilder
Run
Load
Test
Fwd Power
/Fault
Status
Run
Load
Test
SYSTEM
Fwd Power
/Fault
V.35 direct
connect cable
RS-232 direct
connect cable
V.35 direct connect
RS-449/V.36 direct connect
or RS-232 direct connect cables
IBM cluster
controller
Models 52x (DTE mode)
Cabling the Connectors 1-9
ISDN
B1
S/T
B2
Line
Link
Act
Connect
Line
Fault
Error
UNIVERSAL (B)
V.35 adapter
X.21 adapter
RS-449/V.36 DCE
or RS-232 DCE cables
Models 52x (DCE-like mode)
ISDN
B1
S/T
B2
Line
Link
Act
Connect
Line
Fault
Error
UNIVERSAL (B)
SERIAL
RS-232 (C)
RS-232 DCE cable
SERIAL
RS-232 (C)
B
C
Link
Active
Fault
B
C
Link
Active
Fault
IBM cluster
controller
RS-232 direct
connect cable
V.35 direct connect
RS-449/V.36 direct connect
or RS-232 direct connect cables
1-10 CHAPTER 1: INSTALLING THE HARDWARE
Attaching a Redundant Power System
You can attach your SuperStack II bridge/router to a SuperStack II
Redundant Power System (RPS). You will need to order the connecting
cable (part number 3C8101) from 3Com. The following figure shows
where to attach this cable.
Rear panel of unit
Attach RPS cable here
For full power supply redundancy, attach one end of the RPS cable to
the rear panel on the bridge/router and the other end to the RPS. Then
attach one end of the power cord to the rear panel on the
bridge/router and the other end to a power outlet.
In this configuration, the internal supply provides power. If the internal
supply fails or is switched off, or if there is a power failure, the RPS is
activated and the bridge/router reboots.
To reset a bridge/router in this configuration, turn the power off, wait 5
seconds and turn it back on. The bridge/router switches to the RPS,
then switches back to the internal supply to reboot.
CAUTION: For system susceptibility protection, always leave the AC
cord attached to the bridge/router hardware and to a power outlet.
Internal power supply failure is rare. If it occurs, the power switch on
your bridge/router will not operate. To reboot you will need to unplug
the RPS cable and then plug it back in. Replace your bridge/router with
another bridge/router that has a functioning internal power supply as
soon as possible. Contact your 3Com representative to replace your
bridge/router.
Connecting a PC, Terminal, or Modem 1-11
Connecting a PC, Terminal, or Modem
Connect a PC running a terminal emulation program, a terminal, or a
modem to the Console port on the SuperStack II bridge/router to
configure the bridge/router software and review startup and system
operation messages.
To connect a PC, terminal, or modem to the DPE module, follow these
steps:
1 Obtain a cable to connect the console to the Console port on the
bridge/router. See “Console Cables” on page 2-3 for cable pinouts.
The Console port is a 9-pin male connector.
For the PC, use a 9-pin female to 9-pin female PC cable. A null
modem-type cable may be used.
For the terminal, use a 9-pin female to 25-pin terminal cable. A
null modem-type cable may be used.
For the modem, use a 9-pin female to 25-pin male modem cable. A
straight-through-type cable may be used.
2 Connect one end of the cable to the Console port on the SuperStack II
system and the other end to the serial port on the back of your
console.
3 Verify that configurable parameters of your console match the
configuration settings of the Console port specified in Table 1-3.
Table 1-3 CONSOLE Port Configuration Settings
Characteristic Setting
Baud rate 9600
Databits 8
Parity None
Stop bits 1
DTR Ignored
Duplex Full
Echo Off
Flow control X-on/X-off
4 Turn on the console.
1-12 CHAPTER 1: INSTALLING THE HARDWARE
Shutting Down If your SuperStack II system is not connected to an RPS, turn off the
power by pressing the off (0) side of the power switch on the back
panel. If your system is connected to an RPS, turn off the power by
unplugging the RPS cable from the system and then pressing the off (0)
side of the power switch.
OVERVIEW
2
This chapter provides an overview of the SuperStack II NETBuilder
bridge/router, including information on:
■ Model features
■ Chassis panels
■ LEDs
■ DIP switches
■ Hardware interrupt switch
■ Connectors and cables
■ Physical specifications
Model Features Table 2-1 lists each SuperStack II NETBuilder model along with
memory, port, and upgrade information.
Table 2-1 SuperStack II NETBuilder Model Features
Flash
Model
320 4 MB 8 MB None 3 serial 8 MB 12 MB Yes
323 4 MB 8 MB 1 UTP or
327 4 MB 8 MB 1 UTP or
523 4 MB 8 MB 1 UTP or
527 4 MB 8 MB 1 UTP or
Memory
DRAM LAN Ports
STP
STP
STP
STP
Active WAN
Ports
1 serial
1 backup serial
3 serial 8 MB 12 MB No
1 ISDN BRI
1 serial
1 ISDN BRI
2 serial
Flash Memory
Upgradeable To
8 MB 12 MB Yes
8 MB 12 MB Yes
8 MB 12 MB No
DRAM
Upgradeable To
Software
Upgradeable
Chassis Panels The following figures show the front and back panels for each chassis.
Model 32x
Run
Load
Test
LEDs
2-2 CHAPTER 2: OVERVIEW
Figure 2-1 Chassis Front Panels
connector
connector
UTP
STP
UTP
STP
LAN
STP
UTP
connector
LAN
STP
UTP
connector
16Mb
Active
Fault
16Mb
Active
Fault
LEDs
16Mb
Active
Fault
connector
16Mb
Active
Fault
LEDs
V.35
connector
ISDN
S/T
S/T
V.35 (A)
Line
Act
LED
B1
B2
Line
Link
Act
Connect
Line
Fault
Error
Line
Link
Error
Connect
LED
Fault
LEDs (B1 and B2)
UNIVERSAL (B)
UNIVERSAL
connector
Model 52x
UNIVERSAL (B)
UNIVERSAL
connector
SERIAL
SERIAL
RS-232 (C)
RS-232
connector
RS-232 (C)
RS-232
connector
SuperStack II
B
A
C
Link
Active
Link
Active
Fault
NETBuilder
Console
Console
connector
Status
Fault
LEDs (A, B, and C
for serial connectors)
SuperStack II
B
C
Link
Active
Link
Active
Fault
NETBuilder
Console
Console
connector
Status
Fault
LEDs (B and C
for serial connectors)
Run
Load
Test
Fwd Power
/Fault
SYSTEM
Status
LEDs
Run
Load
Test
Fwd Power
/Fault
SYSTEM
Status
LEDs
Fwd
LED
Run
Load
Test
LEDs
Fwd
LED
Power/
Fault
LED
Power/
Fault
LED
LEDs 2-3
MODEL: ESPL-310
S/N:
NETBUILDER
REMOTE OFFICE
222
100-240VAC, 50/60HZ, 1.0-0.5A
250V, F2A
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD
REPLACE FUSE ONY WITH
SAME TYPE AND RATING
SANTA CLARA, CA. MADE IN USA
3COM CORP.
NTWK
ADDR:
080002 04BA1E LAN
04BA1F
04BA20
04BA21
07/31/95
1SC05427
8.3
WAN-A
WAN-B
WAN-C
20-0261-000
On/off
switch
Power
receptacle
RPS
connector
Product
information label
Figure 2-2 Chassis Back Panel
LEDs See “LED Meanings” on page 4-3 for a complete description of the
SuperStack II bridge/router LEDs.
Hardware Interrupt Switch
Connectors and Cables
Console Cables You can connect a PC running a terminal emulation program, a
The hardware interrupt switch is located on the left side of the
bridge/router (when facing the front panel). It is recessed into an
opening near the DIP switches. Press the switch with a nonconductive
object, such as a plastic stylus to put the system into the monitor
firmware utility.
WARNING: Use only a nonconductive object such as a plastic stylus to
press the hardware interrupt switch. Do not use the tip of a pencil.
Graphite particles from the pencil may cause you to receive an electric
shock and damage components on the motherboard.
This section describes each connector on the bridge/router.
terminal, or a modem to the Console port on the SuperStack II
bridge/router.
WARNING: To eliminate cable noise emission in excess of FCC Part 15,
Subpart J, and EN55022 B, this device cable should be shielded and
have connectors with metallic backshells.
2-4 CHAPTER 2: OVERVIEW
PC Cable
Figure 2-3 shows the pinouts for a 9-pin female to 9-pin female PC
cable. A null modem-type cable may be used.
To Console port
5 4 3 2 1
9 8 7 6
9-pin female connector
To PC serial port
9-pin female connector
Name Abbr Pin Pin Abbr Name
Receive Data
Transmit Data
Carrier Detect
Clear to Send
Request to Send
Signal Ground
Data Terminal Ready
Data Set Ready
RxD
TxD
CD
CTS
RTS
Gnd
DTR
DSR
2
3
1
8
7
5
4
6
3
TxD
2
RxD
7
RTS
8
CTS
1
CD
5
GND
6
DSR
4
DTR
Figure 2-3 9-pin to 9-pin PC Cable (Null Modem-Type)
5 4 3 2 1
9 8 7 6
Transmit Data
Receive Data
Request to Send
Clear to Send
Carrier Detect
Signal Ground
Data Set Ready
Data Terminal Ready
Connectors and Cables 2-5
Terminal Cable
Figure 2-4 shows the pinouts for a 9-pin female to 25-pin terminal
cable. A null modem-type cable may be used.
To Console port
5 4 3 2 1
9 8 7 6
9-pin female connector
25-pin male or female connector
To terminal
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
Name Abbr Pin Pin Abbr Name
Receive Data
Transmit Data
Carrier Detect
Clear to Send
Request to Send
Signal Ground
Data Terminal Ready
Data Set Ready
RxD
TxD
CD
CTS
RTS
GND
DTR
DSR
2
3
1
8
7
5
4
6
20
2
TxD
3
4
5
8
7
6
Transmit Data
RxD
Receive Data
RTS
Request to Send
CTS
Clear to Send
CD
Carrier Detect
GND
Signal Ground
DSR
Data Set Ready
DTR
Data Terminal Ready
Figure 2-4 9-pin to 25-pin Terminal Cable (Null Modem-Type)
2-6 CHAPTER 2: OVERVIEW
Modem Cable
Figure 2-5 shows the pinouts for a 9-pin female to 25-pin male modem
cable. A straight-through-type cable may be used.
LAN Connectors and
Cables
To Console port
5 4 3 2 1
9 8 7 6
9-pin female connector
Name Abbr Pin Pin Abbr Name
Transmit Data
Receive Data
Request to Send
Carrier Detect
Clear to Send
Signal Ground
Data Set Ready
Data Terminal Ready
TxD
RxD
RTS
CD
CTS
GND
DSR
DTR
3
2
7
1
8
5
6
4
20
To modem
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
3
2
4
8
5
7
6
Receive Data
RxD
Transmit Data
TxD
Request to Send
RTS
Carrier Detect
CD
Clear to Send
CTS
Signal Ground
GND
Data Set Ready
DSR
Data Terminal Ready
DTR
Figure 2-5 9-pin to 25-pin Modem Cable (Straight-Through-Type)
The bridge/router has two token ring connectors. Only one connector
can be used at one time.
UTP Connector and Cable
The following figure shows the pinouts of the UTP connector (RJ-45).
The connector bodies connect the cable shield to chassis ground.
UTP
12345 786
3 TX
4 RX
5 RX
6 TX
RJ-45 female (shielded)
Table 2-2 lists cable types, multistation access units (MAUs), and
emissions classes compatible with the UTP connector.
Connectors and Cables 2-7
Table 2-2 UTP Cable Types, MAUs, and Emissions Compliance
MAUs Emissions Compliance
Cable Type Passive
Active
Retimed
FCC and
VCCI Class A
*
EN55022 and
VDE Class B
UTP† 100 ohm:
Category 3 no yes yes no
Category 4 yes yes yes no
Category 5 yes yes yes no
Shielded
UTP
100 ohm:
†
Category 3 no yes yes yes
Category 4 yes yes yes yes
Category 5 yes yes yes yes
*Shielding of all cable types should be terminated 360 degrees at the cable plug.
†All UTP compliance testing was accomplished using cables built with Stewart Connector Co.
connector, part number 940 SP-36-08-08.
STP Connector and Cable
The following figure shows the pinouts of the STP connector (DB-9).
The connector bodies connect the cable shield to chassis ground.
STP
5
4321
9876
DB-9 female (shielded)
1 RX
2 GND
3 +5 V
4 GND
5 TX
6 RX
7 GND
8 GND
9 TX
Table 2-2 lists cable types, multistation access units (MAUs), and
emissions classes compatible with the STP connector.
Table 2-3 STP Cable Types, MAUs, and Emissions Compliance
MAUs Emissions Compliance
Active
Cable Type Passive
Retimed
STP 150 ohm:
IBM Type 1 yes yes yes yes
IBM Type 6 yes yes yes yes
*Shielding of all cable types should be terminated 360 degrees at the cable plug.
FCC and
VCCI Class A
EN55022 and
VDE Class B
*
2-8 CHAPTER 2: OVERVIEW
Auxiliary Power. Auxiliary +5 volt power is available on the STP
connector for specialty powered MAUs, powered port expanders, or
signal conversion devices such as token ring STP-to-fiber optic
transceivers. To use the auxiliary power pins, follow the guidelines in
Table 2-4.
Table 2-4 Auxiliary Pin Use
Pinout (STP) Maximum Current
Pin 3 +5 volts (+/- 10%), 500 mA (fused at 2.5 A)
Pins 2, 4, 7, 8 Ground pins
3Com does not guarantee compatibility with external devices that use
the auxiliary power pins of the STP connector. Consult the
manufacturer of external devices to ensure compliance with the
maximum current allowed and to ensure the device does not
compromise STP token ring signalling.
Cabling Standards
Cabling should be installed in accordance with the following standards:
■ EIA/ TIA-568 – Commercial building telecommunications wiring
standard
■ TSB-36 – Additional cable specifications for unshielded twisted pair
cables
■ IBM cabling guidelines
Table 2-5 summarizes the maximum number of workstations supported
on a token ring network.
Table 2-5 Maximum Workstations on a Token Ring Network
Cable Type Token Ring Speed 4 Mbps Token Ring Speed 16 Mbps
STP 250 stations 250 stations
UTP 144 stations 250 stations
Ports on active retimed MAUs usually count as one “station.” If your
device is plugged into an active retimed MAU, the device and the MAU
port total two “stations.” For example, a token ring with all active
retimed MAUs will support a total of 125 devices with STP cabling. A
token ring with all passive MAUs will support a total of 250 devices
with STP cabling. Check the documentation for your MAU for port and
ring in/out station equivalencies.
Connectors and Cables 2-9
Serial Cables The following cables can be used with the serial port connectors.
V.35 to V.35 DCE Cable (32x)
This straight-through cable connects the V.35 port on a bridge/router to
a standard V.35 DCE device.
To V.35 port on bridge/router To DCE
JJ
NN
LL
HH
MM
KK
V.35 male connector V.35 male connector
Name Abbr Pin Pin Abbr Name
Frame Ground
Signal Ground
Request to Send
Clear to Sent
Data Set Ready
Receive Line Signal Detect
Data Terminal Ready
Send Data (A)
Receive Data (A)
Send Data
Received Data (B)
Serial clock Transmit External (A)
Serial Clock Receive (A)
Serial clock Transmit External (B)
Serial Clock Receive (B)
Serial Clock Transmit (A)
Serial Clock Transmit (B)
FG
SG
RTS
CTS
DSR
RLSD
DTR
SD+
RD+
SDRD-
SCTE+
SCR+
SCTE-
SCR-
SCT+
SCT-
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
A
B
C
D
E
F
H
P
R
S
T
U
V
W
X
Y
AA
A
B
C
D
E
F
H
P
R
S
T
U
V
W
X
Y
AA
JJ
NN
LL
HH
MM
KK
FG
SG
RTS
CTS
DSR
RLSD
DTR
SD+
RD+
SDRDSCTE+
SCR+
SCTESCRSCT+
SCT-
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
Frame Ground
Signal Ground
Request to Send
Clear to Sent
Data Set Ready
Receive Line Signal Detect
Data Terminal Ready
Send Data (A)
Receive Data (A)
Send Data
Received Data (B)
Serial Clock Transmit External (A)
Serial Clock Receive (A)
Serial Clock Transmit External (B)
Serial Clock Receive (B)
Serial Clock Transmit (A)
Serial Clock Transmit (B)
Figure 2-6 V.35 Straight-Through Cable
3Com does not sell this cable.
2-10 CHAPTER 2: OVERVIEW
V.35 to V.35 Direct Connect Cable (32x)
This cable connects a V.35 port of the bridge/router to a V.35 port of
an SNA legacy device.
To V.35 port on bridge/router
JJ
NN
LL
HH
MM
KK
V.35 male connector
Signal Name Pin SignalNamePin
Shield
Clear to Send
Transmitted Data
Transmitted Data
Received Data
Received Data
Request to Send
Data Terminal Ready
Data Set Ready
Signal Ground
Receive Signal Element Timing
Receive Signal Element Timing
Transmit Signal Element Timing
Transmit Signal Element Timing
Receive Signal Element Timing
Receive Signal Element Timing
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
Shield
CTS
TXD-A
TXD-B
RXD-A
RXD-B
RTS
DTR
DSR
SG
RXC-A
RXC-B
TXC-A (out)
TXC-B (out)
RXC-A (dce)
RXC-B (dce)
A
C
P
S
R
T
C
H
E
B
V
X
U
W
EE
CC
To V.35 SNA Device
NN
LL
MM
KK
V.35 male connector
Shield
A
RTS
D
RXD-A
R
RXD-B
T
TXD-A
P
TXD-B
S
DCD
F
DSR
E
DTR
H
SG
B
TXC-A (out)
U
TXC-B (out)
W
TXC-A (in)
Y
TXC-B (in)
AA
RXC-A
V
RXC-B
X
JJ
HH
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
Shield
Request to Send
Received Data
Received Data
Transmitted Data
Transmitted Data
Receive Line Signal Detect
Data Set Ready
Data Terminal Ready
Signal Ground
Transmit Signal Element Timing
Transmit Signal Element Timing
Transmit Signal Element Timing
Transmit Signal Element Timing
Receive Signal Element Timing
Receive Signal Element Timing
Figure 2-7 V.35 to V.35 Direct-Connect Cable
3Com does not sell this cable.
Connectors and Cables 2-11
UNIVERSAL to V.35 Adapter Cable
To connect a SuperStack II bridge/router to a V.35 DCE device, cable
the UNIVERSAL connector using a V.35 adapter cable.
Figure 2-8 shows the pin assignments of the V.35 adapter cable.
When constructing your own V.35 adapter cables, the required cable
type is equivalent to Belden part number 9835. Cable length is limited
to CCITT standard V.11 Appendix I.2.
= twisted pair
Name
Shield
Signal Ground
Term in Service
Send Data
Send Data
Received Data
Received Data
Signal Rate indication
Select Frequency
Signal Quality
Standby Select
Terminal Timing
Terminal Timing
Sending Timing
Sending Timing
Receive Timing
Receive Timing
Remote Loopback
Local Loopback
New Signal
Standby Indicator
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Abbr
Sheild
SG
TS
SD (A)
SD (B)
RD (A)
RD (B)
SI
SF
SQ
SS
TT (A)
TT (B)
ST (A)
ST (B)
RT (A)
RT (B)
RL
LL
NS
SB
Pin
1
19
28
4
22
6
24
2
16
33
32
17
35
5
23
8
26
14
10
34
36
braid
Pin
A
B
C
P
S
R
T
D
E
F
H
U
W
Y
AA
V
X
N
L
NN
Abbr
FG
SG
RTS
SD+
SDRD+
RDCTS
DSR
RLSD
DTR
SCTE+
SCTESCT+
SCTSCR+
SCR-
-
RI
J
-
To CSU/DSU
JJ
NN
LL
HH
MM
KK
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
V.35 female connector
Name
Frame Ground
Signal Ground
Request to send
Send Data +
Send Data Received Data (A)
Receive Data (B)
Clear to Send
Data Set Ready
Recieve Line Signal Detect
Data Terminal Ready
Serial Clock Transmit External (A)
Serial Clock Transmit External (B)
Serial Clock Transmit (A)
Serial Clock Transmit (B)
Serial Clock Receive (A)
Serial Clock Receive (B)
Reserved for future use
Reserved for future use
Ring Indicator
Reserved for future use
Figure 2-8 UNIVERSAL to V.35 Adapter Cable
You can order this cable from 3Com (part number 3C8035).
2-12 CHAPTER 2: OVERVIEW
UNIVERSAL to V.35 Direct Connect Cable
This cable connects a UNIVERSAL port on the bridge/router to the V.35
port on an SNA legacy device.
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name Abbr Pin NameAbbrPin
Shield
Clear to Send
Transmit Data
Transmit Data
Receive Data
Receive Data
Request to Send
Data Set Ready
Data Terminal Ready
Signal Ground
Receive Clock
Receive Clock
Transmit Clock
Transmit Clock
Transmit Clock
Transmit Clock
Shield
CTS
TxD (A)
TxD (B)
RxD (A)
RxD (B)
RTS
DSR
DTR
SG
RxC (A)
RxC (B)
TxC (A) (out)
TxC (B) (out)
TxC (A) (dce)
TxC (B) (dce)
22
24
28
16
32
19
26
17
35
17
35
To SNA device
JJ
NN
LL
HH
MM
KK
BFLRVZDD
DJNTXBBFF
AEKPUYCC
CHMSWAEE
V.35 male connector
1
C
4
6
8
A
D
R
T
P
S
F
H
E
B
U
W
Y
AA
V
X
Shield
RTS
RxD (A)
RxD (B)
TxD (A)
TxD (B)
DCD
DTR
DSR
SG
TxC (A) (out)
TxC (B) (out)
TxC (A) (in)
TxC (B) (in)
RxC (A)
RxC (B)
Shield
Request to Send
Receive Data
Receive Data
Transmit Data
Transmit Data
Receive Line Signal Detect
Data Terminal Ready
Data Set Ready
Signal Ground
Transmit Clock
Transmit Clock
Transmit Clock
Transmit Clock
Receive Clock
Receive Clock
Figure 2-9 UNIVERSAL to V.35 Direct Connect Cable
You can order this cable from 3Com (part number 3C8135).
Connectors and Cables 2-13
UNIVERSAL to RS-449/V.36 DCE Cable
To connect a SuperStack II bridge/router to a V.36 DCE device, cable the
UNIVERSAL connector using a V.36 adapter cable.
Figure 2-10 shows the pin assignments of the V.36 adapter cable.
When constructing your own V.36 adapter cables, the required cable
type is equivalent to Belden part number 9835. Cable length is limited
to CCITT standard V.11 Appendix I.2.
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name
Shield
Send Data
Send Data
Receive Data
Receive Data
Incoming Call
Signal Ground
Clear to Send
Clear to Send
Request to Send
Request to Send
Data Mode
Data Mode
Terminal Ready
Terminal Ready
Receiver Ready
Receiver Ready
Receive Timing
Receive Timing
Terminal Timing
Terminal Timing
Send Timing
Send Timing
Send Common
Receive Common
Abbr
Shield
SD (A)
SD (B)
RD (A)
RD (B)
IC
SG
CS (A)
CS (B)
EIA (A)
EIA (B)
DM (A)
DM (B)
TR (A)
TR (B)
RR (A)
RR (B)
RT (A)
RT (B)
TT (A)
TT (B)
ST (A)
ST (B)
SC
RC
Pin
1
4
22
6
24
15
19
9
27
7
25
11
29
12
30
13
31
8
26
17
35
5
23
37
20
Pin
1
4
22
6
24
15
19
9
27
7
25
11
29
12
30
13
31
8
26
17
35
5
23
37
20
Figure 2-10 UNIVERSAL to V.36 Adapter Cable
3Com does not sell this cable.
To DCE
37-pin female connector
Abbr
Shield
SD (A)
SD (B)
RD (A)
RD (B)
IC
SG
CS (A)
CS (B)
EIA (A)
EIA (B)
DM (A)
DM (B)
TR (A)
TR (B)
RR (A)
RR (B)
RT (A)
RT (B)
TT (A)
TT (B)
ST (A)
ST (B)
SC
RC
Name
Shield
Send Data
Send Data
Receive Data
Receive Data
Incoming Call
Signal Ground
Clear to Send
Clear to Send
Request to Send
Request to Send
Data Mode
Data Mode
Terminal Ready
Terminal Ready
Receiver Ready
Receiver Ready
Receive Timing
Receive Timing
Terminal Timing
Terminal Timing
Send Timing
Send Timing
Send Common
Receive Common
2-14 CHAPTER 2: OVERVIEW
UNIVERSAL to RS-449/V.36 Direct Connect Cable
This cable connects the UNIVERSAL connector on the bridge/router to
the RS-449/V.36 port of an SNA legacy device.
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name NameAbbr AbbrPin Pin
Shield
Request to Send
Request to Send
Transmit Data
Transmit Data
Receive Data
Receive Data
Request to Send
Request to Send
Data Mode
Data Mode
Terminal Ready
Terminal Ready
Receive Timing
Receive Timing
Terminal Timing
Terminal Timing
Terminal Timing
Terminal Timing
Signal Ground
Send Common
Receive Common
Shield
EIA (A)
EIA (B)
SD (A)
SD (B)
RD (A)
RD (B)
EIA (A)
EIA (B)
DM (A)
DM (B)
TR (A)
TR (B)
RT (A)
RT (B)
TT (A)
TT (B)
TT (A)
TT (B)
SG
SC
RC
1
7
25
4
22
6
24
7
25
11
29
12
30
8
26
17
35
17
35
19
37
20
To RS449/V.36 SNA Device
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
RS-449 male connector
27
24
22
13
31
12
30
11
29
17
35
23
26
19
37
20
1
9
6
4
5
8
Sheild
CS (A)
CS (B)
RD (A)
RD (B)
SD (A)
SD (B)
RR (A)
RR (B)
TR (A)
TR (B)
DM (A)
DM (B)
TT (A)
TT (B)
ST (A)
ST (B)
RT (A)
RT (B)
SG
SC
RC
Shield
Clear to Send
Clear to Send
Receive Data
Receive Data
Send Data
Send Data
Receiver Ready
Receiver Ready
Terminal Ready
Terminal Ready
Data Mode
Data Mode
Terminal Timing
Terminal Timing
Send Timing
Send Timing
Receive Timing
Receive Timing
Terminal Timing
Send Common
Receive Common
Figure 2-11 UNIVERSAL to RS-449/V.36 Direct-Connect Cable
3Com does not sell this cable.
Connectors and Cables 2-15
UNIVERSAL to RS-232 DCE Cable
This cable connects the UNIVERSAL port on a SuperStack II NETBuilder
bridge/router to an RS-232 interface on a DCE device.
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name Abbr Pin Pin Abbr Name
Shield
Remote Loopback
Standby Indicator
Teminal in Service
Signal Rate Indicator
Select Frequency
Standby Select
Signal Quality
Test Mode
Incoming Call
Local Loopback
New Signal
Signal Ground
Shield
RL
SB
TS
SF
SS
SQ
TM
LL
NS
SG
1
14
36
28
SI
2
16
32
33
18
IX
15
10
34
19
Figure 2-12 UNIVERSAL to RS-232 DCE Cable
You can order this cable from 3Com (part number 3C8023).
1
2
3
4
5
6
20
8
17
15
24
22
7
Chas. GND
TxD
RxD
RTS
CTS
DSR
DTR
CD
RxC(SCR)
TxC(SCT)
TT(SCTE)
RI
GND
To DCE
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Shield
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
DTE Ready
Carrier Detect
Receive Clock - DCE Source
Transmit Clock - DCE Source
Transmit Clock - DTE Source
Ring Indicator
Signal Ground
2-16 CHAPTER 2: OVERVIEW
UNIVERSAL to RS-232 Direct Connect Cable
This cable connects the UNIVERSAL port on the bridge/router to the
RS-232 port on an SNA legacy device.
To UNIVERSAL port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name Abbr NameAbbrPin Pin
Shield
Clear to Send
Transmit Data
Receive Data
Request to Send
Data Set Ready
Data Terminal Ready
Receive Clock
Transmit Clock
Signal Ground
Shield
CTS
TxD
RxD
RTS
DSR
DTR
RxC
TxC (out)
SG
1
4
14
36
28
16
32
18
10
19
1
5
3
2
8
20
6
24
15
17
7
To SNA device
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Shield
RTS
RxD
TxD
DCD
DTR
DSR
TxC (out)
TxC (in)
RxC
SG
Figure 2-13 UNIVERSAL to RS-232 Direct-Connect Cable
You can order this cable from 3Com (part number 3C8123).
Shield
Request to Send
Receive Data
Transmit Data
Carrier Detect
DTE Ready
DCE Ready
Transmit Clock
Transmit Clock
Receive Clock
Signal Ground
Connectors and Cables 2-17
RS-232 to RS-232 DCE Cable
This straight-through cable connects the RS-232 port on a SuperStack II
bridge/router to a standard RS-232 DCE device.
Figure 2-14 shows the pin assignments of the RS-232 cable.
To RS-232 port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Name Abbr Pin Pin Abbr Name
Shield
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
Signal Ground
Carrier Detect
Transmit Clock
Receive Clock
DTE Ready
Remote Loopback
Ring Indicator
Transmit Clock (DTE Source)
Test Mode
Figure 2-14 RS-232 Straight-Through Cable
3Com does not sell this cable.
Chassis GND
TxD
RxD
RTS
CTS
DSR
GND
CD
TxC (SCT)
RxC (SCR)
DTR
RL
RI
TT (SCTE)
TM
15
17
20
21
22
24
25
To modem/TA or CSU/DSU
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Chassis GND
1
2
3
4
5
6
7
8
1
TxD
2
RxD
3
RTS
4
CTS
5
DSR
6
GND
7
CD
8
TxC (SCT)
15
RxC (SCR)
17
DTR
20
RL
21
RI
22
TT (SCTE)
24
TM
25
Shield
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
Signal Ground
Carrier Detect
Transmit Clock
Receive Clock
DTE Ready
Remote Loopback
Ring Indicator
Transmit Clock (DTE Source)
Test Mode
2-18 CHAPTER 2: OVERVIEW
RS-232 to RS-232 Direct Connect Cable
This cable connects the RS-232 port on the bridge/router to an RS-232
port on an SNA legacy device.
To RS-232 port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Name Abbr NameAbbrPin Pin
Shield
Clear to Send
Transmit Data
Receive Data
Request to Send
DCE Ready
Signal Ground
DTE Ready
Receive Clock - DCE Source
Transmit Clock - DTE Source
Secondary Receive Data
To SNA device
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Chas. GND
CTS
TxD
RxD
RTS
DSR
GND
DTR
RxC(SCR)
TT(SCTE)
SRD
1
5
2
3
4
6
7
20
17
24
16
1
5
3
2
8
20
7
6
24
15
17
Chas. GND
CTS
RxD
TxD
CD
DTR
GND
DSR
TT(SCTE)
TxC(SCT)
RxC(SCR)
Shield
Clear to Send
Receive Data
Transmit Data
Carrier Detect
DTE Ready
Signal Ground
DCE Ready
Transmit Clock - DTE Source
Transmit Clock - DCE Source
Receive Clock - DCE Source
Figure 2-15 RS-232 to RS-232 Direct-Connect Cable
You can order this cable from 3Com (part number 3C8132).
Connectors and Cables 2-19
UNIVERSAL to X.21 Adapter Cable
If you want to connect any of the SuperStack II bridge/routers
documented in this guide to an X.21 DCE device, cable the connector
marked UNIVERSAL using an X.21 adapter cable.
Figure 2-16 shows the pin assignments of the X.21 adapter cable.
To Universal port on bridge/router
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
37-pin female connector
Name
Send Data
Send Data
Receive Data
Receive Data
Send Timing
Receive Timing
Send Timing
Receive Timing
Terminal Ready
Terminal Ready
Data Mode
Data Mode
Request to Send
Receiver Ready
Clear to Send
Request to Send
Receiver Ready
Clear to Send
Signal Ground
Shield
Abbr
SD (A)
SD (B)
RD (A)
RD (B)
ST (A)
RT (A)
ST (B)
RT (B)
TR (A)
TR (B)
DM (A)
DM (B)
EIA (A)
RR (A)
CS (A)
EIA (B)
RR (B)
CS (B)
SG
Sheild
Pin
4
22
6
24
5
8
23
26
12
30
11
29
7
13
9
25
31
27
19
1
braid
To modem/TA or CSU/DSU
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15
15-pin male connector
Pin
2
9
4
11
6
13
3
10
5
12
8
1
Abbr
TA
TB
RA
RB
SA
SB
CA
CB
IA
IB
GND
Sheild
Name
Transmit Data (A)
Transmit Data (B)
Receive Data (A)
Receive Data (B)
Receive Clock
Receive Clock
Control (A)
Control (B)
Indicate (A)
Indicate (B)
Ground
Shield Drain
Figure 2-16 UNIVERSAL to X.21 Adapter Cable
2-20 CHAPTER 2: OVERVIEW
When constructing your own X.21 adapter cables, the required cable
type is equivalent to Belden part number 9839. Cable length is limited
to CCITT standard V.11 Appendix I.2.
You can order the X.21 adapter cable from 3Com (part number
3C8021).
X.21 European Connector Compliances. For installations where
compliance to the European standard NET 1 is required, use an X.21
15-pin male connector (ISO 4903) to construct the RS-449-to-X.21
conversion cable. For compliance in Austria, Denmark, Finland,
Germany, and the United Kingdom, use M3-threaded attaching screws
with this connector.
ISDN Cable
(Model 52x )
To connect a model 52x bridge/router to an ISDN network, use an ISDN
cable with an RJ-45 connector. 3Com does not supply this cable.
Table 2-6 shows the pin assignments of the cable with both ends
terminated in RJ-45 connectors.
Table 2-6 ISDN Cable Pinouts
Pin No. Function Signal
1 Not connected NC
2 Not connected NC
3 Transmit data (plus) TXD+
4 Receive data (plus) RXD+
5 Receive data (minus) RXD6 Transmit data (minus) TXD7 Not connected NC
8 Not connected NC
Physical Specifications 2-21
Physical Specifications
Table 2-7 provides the environmental requirements of model 32x and
52x bridge/routers.
Table 2-7 Environmental Requirements for Model 32x and 52x Bridge/Routers
Parameter Minimum Requirement Maximum Requirement
Temperature
Operating 5 °C 40 °C
Nonoperating -40 °C 75 °C
Altitude
Operating 15,000 ft 15,000 ft
Nonoperating 40,000 ft 40,000 ft
Relative Humidity
Operating 10% noncondensing 90% noncondensing
Nonoperating 10% noncondensing 90% noncondensing
2-22 CHAPTER 2: OVERVIEW
3
Removing the Cover
UPGRADING MEMORY
The following memory upgrades are available from 3Com for your
bridge/router:
■ 4 MB (3C8104) flash memory
■ 4 MB DRAM (3C8040)
Complete the following sections to install flash memory or DRAM in
your SuperStack II bridge/router.
CAUTION: If you install the flash memory upgrade and then remove it
from your system after startup, you will need to reload the system
software using the procedures described in the software guide.
1 Turn off the power and unplug the power cord from your SuperStack II
bridge/router. Unplug the RPS cable, if connected.
2 Remove the two screws on the back of the bridge/router.
MODEL: ESPL-310
S/N:
NETBUILDER
REMOTE OFFICE
100-240VAC, 50/60HZ, 1.0-0.5A
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD
REPLACE FUSE ONY WITH
SAME TYPE AND RATING
3COM CORP.
1SC05427
327
NTWK
080002 04BA1E LAN
04BA1F
ADDR:
04BA20
250V, F2A
04BA21
07/31/95
SANTA CLARA, CA. MADE IN USA
8.3
WAN-A
WAN-B
WAN-C
20-0261-000
Remove these two screws
3 Slide the cover back and up off the bridge/router.
3-2 CHAPTER 3: UPGRADING MEMORY
CAUTION: Make sure you do not accidentally alter the dip switch
settings when you remove the cover.
Dip switches should all
be in the down position
Installing Memory To install the flash memory and/or DRAM SIMM, follow these steps:
1 With the chips facing toward the back of the bridge/router, place the
silver connector edge of the SIMM into the appropriate SIMM socket at
almost a 90-degree angle.
2 Align the semicircular notch with the ridge in the SIMM socket.
Do not force the SIMM. It can be installed in only one direction.
3 Once the SIMM is aligned, gently push down on the outer corners of
the SIMM until it snaps into place.
1
2
End view
OFFICE
CONNECT
Flash slot
DRAM slot
CAUTION: Before continuing with the next section, be sure that all screws and
pins are properly seated and the dip switches are properly aligned.
Reinstalling the Cover
Reinstalling the Cover 3-3
1 Reinstall the cover on the SuperStack II bridge/router and reattach it to
the chassis with the two screws.
2 Place the upgrade sticker included in your kit on the chassis, as shown.
If you have both the flash memory and the DRAM memory upgrade
kits, place one sticker from each kit as shown.
MODEL: ESPL-310
S/N:
NETBUILDER
REMOTE OFFICE
100-240VAC, 50/60HZ, 1.0-0.5A
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD
REPLACE FUSE ONY WITH
SAME TYPE AND RATING
3COM CORP.
1SC05427
222
NTWK
080002 04BA1E LAN
04BA1F
ADDR:
04BA20
250V, F2A
04BA21
07/31/95
SANTA CLARA, CA. MADE IN USA
8.3
WAN-A
WAN-B
WAN-C
20-0261-000
Place upgrade sticker in either or both locations
3 Plug the power cord back into the bridge/router. If available, plug the
RPS cable into the bridge/router.
4 Turn on the bridge/router.
3-4 CHAPTER 3: UPGRADING MEMORY
4
TROUBLESHOOTING
This chapter describes troubleshooting using the LEDs on the front
panel of the system.
If the Power/Fault LED appears yellow at any time during the startup
process, the bridge/router has encountered a problem during system
test or system software load. If the Power/Fault LED appears yellow,
check the other LEDs as shown in the following figure.
SuperStack II
NETBuilder
Console
Status
Status LEDs: (Left to right) is each one on or off?
Load LED: is it on constantly, or flashing?
Test LED: Is it on or off?
If the Test LED is lit, a problem occurred during the system test phase.
Note the pattern of the Status LEDs and compare the results with the
information in Table 4-1.
If the Load LED is lit, a problem occurred during the system software
load phase. Note the pattern of the Status LEDs and compare the
results with the information in Table 4-2.
Run
Load
Test
SYSTEM
®
Fwd Power
/Fault
If the Power/Fault LED appears yellow during startup, check
the other LEDs for related indications of the problem.
4-2 CHAPTER 4: TROUBLESHOOTING
Troubleshooting During the Test Phase
Table 4-1 System Self-test Errors
Status LEDs
1 2 3 4 Test LED Power/Fault LED Meaning and Action
Off Off On On On Yellow EEPROM checksum test failed.
Troubleshooting During the Load Phase
Table 4-2 System Software Load Errors
Status LEDs
1 2 3 4 Load LED Power/Fault LED Meaning and Action
Off Off On On On Yellow Software image file has been deleted or boot source and
On Off Off Off On Yellow Unable to transmit BOOTP request. Bridge/router is not
On Off Off On On Yellow No response to BOOTP request. BOOTP server not present
On Off On Off On Yellow No response to Address Resolution Protocol (ARP) request
(continued)
When a problem occurs during the test phase, the Status LEDs light in
a particular pattern. Table 4-1 shows the Status LED pattern, the
problem associated with that pattern, and the action to take.
Contact your network supplier.
When a problem occurs during the load phase, the Status LEDs light in
particular patterns. Table 4-2 shows the Status LED patterns, the
problems associated with these patterns, and the actions to take.
image file names do not match.
Reload the system software. Refer to the software
.
guide
connected to token ring correctly.
Check cable connections.
or incorrectly configured.
Check TFTP server configuration and verify the MAC
address of the bridge/router. Press Reset to retry the
system software load. If the load is unsuccessful, call
your network supplier for assistance.
from TFTP server. TFTP server not present or incorrectly
configured.
Check TFTP server configuration and verify the MAC
address of the bridge/router. Press Reset to retry the
system software load If the load is unsuccessful, call
your network supplier for assistance.
LED Meanings 4-3
Table 4-2 System Software Load Errors (continued)
Status LEDs
1 2 3 4 Load LED Power/Fault LED Meaning and Action
On On On On On Yellow Write to Flash File System failed.
Call your network supplier for assistance.
LED Meanings Table 4-3 provides the meanings for the lit LEDs on a SuperStack II
bridge/router.
Table 4-3 LED Meanings
Associated
Model No.
323, 327,
or 52x
323, 327,
or 52x
323, 327,
or 52x
52x ISDN (D channel) Line Act The ISDN line is activated.
52x ISDN (D channel) Line Error Indicates a disconnected cable, or a loss of phantom power.
52x ISDN B1, B2 Link The path using B1 or B2 is up.
52x ISDN B1, B2 Connect An end-to-end B channel connection exists or is in progress.
52x ISDN B1, B2 Fault An error in the received frames is detected.
All V.35, Universal, or
All V.35, Universal, or
All V.35, Universal, or
All Not applicable Status Provides additional status for the Run, Load, and Test LEDs.
All Not applicable Run The system software has successfully loaded and started running.
All Not applicable Load The system software is being loaded.
All Not applicable Test The system is executing self-tests.
All Not applicable Fwd A packet is being forwarded between any two ports.
All Not applicable Power/
Connector
Unshielded twisted
pair (UTP) or shielded
twisted pair (STP)
UTP or STP Active The system is transmitting or receiving traffic.
UTP or STP Fault The system is experiencing a problem with the token ring
RS-232
RS-232
RS-232
LED Meaning
16 MB The system is either attempting to enter or has successfully
Link The path is up.
Active A physical connection to an active device has been established.
Fault An error in the received frames is detected.
Fault
entered the token ring at the rate of 16 MB. This LED will not
light if the system is either attempting to enter or has
successfully entered the token ring at the rate of 4 MB.
connection. This LED resets if you reboot the system.
When the LED is green, the system has power and is
operational. When the LED is yellow, a problem is preventing
normal operation.
4-4 CHAPTER 4: TROUBLESHOOTING
Troubleshooting the Token Ring Connection
This section is not applicable to model 320. Table 4-4 summarizes
problems that can occur with a token ring connection and what action
you can take.
Table 4-4 Troubleshooting the Token Ring Connection (Models 327 and 527 only)
Symptom Cause and Action
The LAN LEDs are doing the following:
■ 16 MB LED is blinking slowly
(turning on then off at
approximately 15 second intervals).
■ The Fault LED is on.
(continued)
The following are possible problems indicated by the LED indicators:
Cable connection problem
The LAN cable may be improperly connected. Verify that the LAN
cable is properly connected at both ends. Check the wall plate if used
and the multistation access unit (MAU) of the central wiring center.
Bad cable
You may be cabling your STP or UTP connector with a faulty or
improperly wired cable. Swap the cable for another cable that is
known to work.
Bad concentrator port
The port or port connector of the MAU may be defective. Move the
station’s cable to another MAU port that is known to work.
Heavy network traffic
The Activity LED may remain off longer than expected. Wait for
network traffic to subside.
Insertion at the wrong speed
The system may have attempted to enter the token ring network at
the wrong speed. Check the setting of the ring speed for path 1.
Boundary Router users may use the System Configuration menu to
set the token ring speed. Full router users use SHow !1 -PATH BAud.
Also, check the path to make sure that it is enabled (SHow !1 -PATH
CONTrol).
Duplicate node address
Check to make sure that the MAC address of the system on your
network is unique.
Token ring experiencing network error recovery
The Activity LED may remain off longer than expected. Wait for
normal token ring operation after an automatic error recovery.
If none of these actions solves your problem, contact your network
supplier.
Troubleshooting the Token Ring Connection 4-5
Table 4-4 Troubleshooting the Token Ring Connection (Models 327 and 527 only) (continued)
Symptom Cause and Action
Path 1 is up, but the system does not
appear to be communicating with
other network devices.
The system may have attempted to enter the token ring at the
wrong speed.
Check the setting of the ring speed for path 1 (SHow !1 -PATH
BAud). Make sure that the setting of this parameter matches the
speed of the token ring network.
The following error message appears:
This is the only station
on the ring
If your system is the first device to enter the ring, disregard this
message. If there are multiple nodes on the ring, your system may be
isolated.
1 Determine the number of nodes on your ring.
2 If there are multiple nodes on the ring, check the setting of the ring
speed for path 1. (In monitor mode, enter CL, then select ring speed
from the menu that displays.) Make sure that the setting of this
parameter matches the speed of the token ring network.
One of these error messages appears:
Possible ring speed
mismatch
Adapter is not connected to
a ring
or
Open failed during phase
- lobe media.
Specialty powered wiring center
(MAU) or signal conversion device
(such as STP-to-fiber optic transceivers)
will not work on STP connector.
Possible physical connection problem or the system may have attempted
to enter the token ring at the wrong speed.
1 Check your LAN cable.
2 Determine the ring speed of your token ring network.
3 Check the setting of the ring speed for path 1. (In monitor mode,
enter the CL, then select ring speed from the menu that displays.)
Make sure that the setting of this parameter matches the speed of
the token ring network.
External device may have overstressed the auxiliary power’s limits,
lowering available voltage to unacceptable levels.
Refer to the cabling information in your hardware installation
manual for voltage, current, and pinout specifications of this feature.
Refer to the documentation that accompanies your external device
for compatibility information.
External device may have blown the fuse of the system.
Return the system for fuse replacement.
If these actions do not solve the problem, contact your network supplier.
(continued)
4-6 CHAPTER 4: TROUBLESHOOTING
Table 4-4 Troubleshooting the Token Ring Connection (Models 327 and 527 only) (continued)
Symptom Cause and Action
The MAC address of the system does
not appear on the token ring network.
The MAC address on the network is in noncanonical format.
The MAC address encoded on the EEPROM and printed on the label
is in canonical format and needs to be converted to noncanonical
format. Each byte, represented by the number pairs below, consists
of 8 bits. To convert the canonical byte 1A (in hexadecimal) to the
noncanonical byte, you must mirror the bits, as shown.
08 00 02 1A 4B 5C canonical (least significant bit first)
is converted to
10 00 40 58 D2 3A noncanonical (most significant bit first)
1A
=
0001 1010580101 1000
The MacAddrConvert command converts a MAC address in
canonical format to noncanonical format. For example, if you enter:
MacAddrConvert 0800021A4B5C
The system displays the following:
%10004058D23A
If you experience a problem or receive an error message that is not
documented in Table 4-4, contact your network supplier.
A
PROVISIONING YOUR ISDN LINE
This appendix provides North American (U.S. and Canada) and German
provisioning information for the SuperStack II NETBuilder
bridge/routers and boundary routers using an Integrated Services Digital
Network (ISDN) line with a basic rate interface (BRI).
If your ISDN line is not provisioned correctly, you will not be able to use
your SuperStack II bridge/router or boundary router to access a remote
network.
Ordering North American ISDN BRI Services
To order ISDN service from your telephone company, follow these steps:
1 Call the telephone company and ask for the ISDN representative.
2 Tell the representative you want ISDN service for a SuperStack II
NETBuilder ISDN bridge/router, and that you have the following
information:
■ Line provisioning
■ ISDN outlet type
3 Give the representative the Bellcore ISDN ordering code (IOC). The IOC
tells the telephone company which parameter settings to use for
SuperStack II bridge/routers. The IOC for this product is “Capability R.”
Not all Regional Bell Operating Companies use IOCs. If the
representative has the IOC for SuperStack II bridge/router listed, skip to
step 7; otherwise, continue on to step 4.
4 Ask the representative which ISDN switch type your line uses. Place a
check mark in the appropriate box on the ISDN Information Sheet in
step 7.
5 Ask for an RJ-45 connector to be installed with your new ISDN outlet.
A-2 APPENDIX A: PROVISIONING YOUR ISDN LINE
6 If desired, ask for an NT1 to connect your SuperStack II bridge/router to
the ISDN line. (You can also purchase an NT1 from a reseller.)
7 Fill out the ISDN Information Sheet:
ISDN Switch Type
ISDN Information Sheet
3Com SuperStack II Bridge/Router
AT&T 5ESS NI1
AT&T 5ESS Custom
Northern Telecom DMS 100
Siemens EWSD
❒
❒
❒
❒
Number of ISDN phone numbers (1 or 2)_________________________
Phone number 1 _____________________________________________
Phone number 2 _____________________________________________
SPID number for phone number 1 ______________________________
SPID number for phone number 2 ______________________________
Ask for the following information:
■ ISDN Switch Type. Ask the representative which ISDN switch type
your line uses. Place a check mark next to that switch on the ISDN
Information Sheet. Each switch type has a corresponding
provisioning information table later in this section.
■ Number of ISDN Phone Numbers. Your ISDN line can support one
or two phone numbers. Specify how many phone numbers you are
ordering.
■ Phone Numbers. Ask the telephone representative for your ISDN
phone numbers and write them in the space provided.
■ Service Profile ID (SPID) Number. Ask the telephone
representative for your SPID numbers. (For a multipoint line, the
telephone representative should provide two SPID numbers.) A SPID
number has 10–15 characters; for example, 0155512120. Your
switch type may not require the SPID number.
North American Switch Provisioning Tables A-3
Your telephone company gives you the phone number and SPID
number after it installs your line.
If your telephone company has the IOC for a SuperStack II
bridge/router or boundary router, you do not need to complete
step 8.
8 Provide provisioning information that corresponds to your ISDN switch
using the tables in the following sections.
This completes the ISDN ordering process for SuperStack II ISDN
bridge/routers. Keep the information sheet handy; you will need it
when you install your bridge/router.
North American Switch Provisioning Tables
This section provides provisioning information for the following switch
types:
■ AT&T 5ESS
■ AT&T 5ESS Custom
■ DMS 100 and National ISDN
■ Siemens EWSD
A-4 APPENDIX A: PROVISIONING YOUR ISDN LINE
AT&T 5ESS Switch To order ISDN service for an AT&T 5ESS switch, provide the telephone
company with the information in Table A-1.
Table A-1 Ordering ISDN Service for an AT&T 5ESS Switch
Required Information Specification
Line type National ISDN 1 line
Line code 2B1Q (2B+D)
Interface type S/T interface with NT1 and RJ-45 jack
Maximum terminals (MAXTERM) 1
Maximum B channels (MAXB CHNL) 2
Actual user Yes
Circuit-switched data 2
Circuit-switched data channel Any
Terminal type A-Basic or E-Type (data only) Terminal
Display No
Circuit-switched data limit 2
Voice or data Data
Call appearance Idle
DN (directory number) must be set as follows:
Parameter Setting
B1 Circuit-switched data
B2 Circuit-switched data
D Signaling only
MAXTERM 1
MAXB CHNL 2
ACT USR Y
CSD 2
CSD CHL Any
TERMTYP TYPEA or TYPEE
Display No
CSD Limit 2
CA PREF 1
North American Switch Provisioning Tables A-5
AT&T 5ESS Custom
Switch
To order ISDN service for an AT&T 5ESS custom switch, provide the
telephone company with the information in Table A-2.
Table A-2 Ordering ISDN Service for an AT&T 5ESS Custom Switch
Required Information Specification
Line type ISDN line with point-to-point configuration
Line code 2B1Q (2B+D)
Interface type S/T interface with NT1 and RJ-45 jack
Maximum terminals (MAXTERM) 1
Maximum B channels (MAXB CHNL) 2
Circuit-switched data (CSD) 2
Circuit-switched data channel (CSD
CHL)
Terminal type (TERMTYP) A-Basic or E-Type (data only) Terminal
Display No
Voice or data Data
Call appearance preference Idle
DN must be set as follows:
Parameter Setting
B1 Circuit-switched data
B2 Circuit-switched data
D Signaling only
ACT USR Yes
TERMTYP TYPEA or TYPEE
CSD Limit 2
CA PREF 1
Any
A point-to-point configuration on a SuperStack II bridge/router or
boundary router is selected by setting the SPIDn1 and SPIDn2
parameters to none.
A-6 APPENDIX A: PROVISIONING YOUR ISDN LINE
DMS 100 and
National ISDN
To order ISDN service for a DMS 100 or National ISDN switch, provide
the telephone company with the information in Table A-3.
Table A-3 Ordering ISDN Service for a DMS 100 Switch
Required Information Specification
Line type DMS 100 or National ISDN 1line (in North
America)
Line code 2B1Q (2B+D)
Interface type S/T interface with NT1 and RJ-45 jack
Circuit-switched option Yes
Bearer Restriction option No packet mode data (NOPMD)
Protocol Functional version 0 (PVC 0) for DMS 100
Functional version 2 (PVC 2) for National ISDN
SPID suffix 1 in North America only
Terminal endpoint identifier (TEI) Dynamic
Ring No
Key system (EKTS) No
Voice or data Data
DN must be set as follows:
Parameter Setting
B1 Circuit-switched data
B2 Circuit-switched data
D Signaling only
MAXTERM 1
MAXB CHNL 2
ACT USR Y
CSD 2
CSD CHL Any
Display No
CSD Limit 2
CA PREF 1
SPIDs A-7
Siemens EWSD
Switch
To order ISDN service for a Siemens EWSD switch, provide the phone
company with the information in Table A-3.
Table A-4 Ordering ISDN Service for a Siemens EWSD Switch
Required Information Specification
Line Type National ISDN 1 line
Line Code 2B+D
Interface Type S/T interface with NT1 and RJ-45 jack
Circuit-switched Option Yes
Bearer Restriction Option No packet mode data (NOPMD)
Protocol PPP
SPID suffix 1
Terminal Endpoint Identifier (TEI) Dynamic
Ring No
Maximum Keys 64
Key System (EKTS) No
Voice or Data Data
Lower Layer Compatibility Option for Data B channels
SPIDs When you request services, you may also need the following information
about SPIDs and other service attributes:
■ Request multipoint, initializing terminal service; the maximum number
of terminals is two. The service provider supplies you with two SPIDs.
■ If you request ISDN service from an AT&T 5ESS service provider and
the switch is running custom (or non-national ISDN 1) software, the
format is:
01 + 7-digit telephone number + 1-digit suffix.
■ If you request a different telephone number for each B channel, the
suffix can be the same. A suffix of 0 is typical in this case. If you
decide to use the same telephone number for both B channels, use a
different suffix so that the two SPIDs are unique.
■ If you request NI-1 (national ISDN 1) service from an AT&T 5ESS
service provider, the format is:
01 + 7-digit telephone number + 1-digit suffix + 2-digit TID (terminal
identifier).
A-8 APPENDIX A: PROVISIONING YOUR ISDN LINE
■ The SPID numbers must be unique. The 2-digit TID can be any
number from 0 to 62. The TID has no effect on the operation of the
SuperStack II bridge/router, but it is a necessary part of the SPID that
the bridge/router uses to gain access to the ISDN network.
■ If you request ISDN service from a Northern Telecom DMS-100
service provider, the format is:
Area code + 7-digit telephone number + 0 to 8 digit suffix + 2 digit
TID.
■ The TID can be any number from 0 to 62, but needs to be unique
so that the SPIDs are also unique. This format applies when the
switch is running Custom and NI-1 (North American 3) versions of
software.
■ If you order AT&T 5ESS ISDN services, choose either a Type A or
Type E terminal. The Type E terminal is preferable because it is for
data only.
■ Do not request supplementary services, such as autohold or
conference, because a SuperStack II bridge/router does not support
them.
NT1s and Power Supplies
North American telephone companies require an NT1 and a power
supply for every ISDN line. Your service provider or telephone company
can provide you with an NT1 and power supply for a small monthly
fee. However, you may prefer to purchase it from an ISDN equipment
vendor. The NT1 and power supply may come in a single, standalone
box or the two may be in separate units. In this discussion, the two
units together are referred to as an NT1.
Telephone companies in North America use two kinds of NT1s,
differentiated by the data encoding scheme used in transmitting data
between the NT1 and the telephone company’s equipment. The two
data encoding schemes are 2B1Q (two bits mapped into one
quaternary symbol) and alternate mark inversion (AMI). The 2B1Q
scheme is the dominant method in use today. The AMI scheme is older
and rarely used.
Two power sources are available from an NT1 for CPE equipment. An
ISDN telephone uses one power source. The SuperStack II
bridge/router does not use either source. Instead, it detects the
presence or absence of phantom power and can determine whether or
not a telephone cord is plugged in.
Ordering German ISDN BRI Services A-9
Not all NT1s provide phantom power; for example, the AMI NT1 from
AT&T does not. If you connect the SuperStack II bridge/router to an
NT1 that does not provide phantom power, you must turn off phantom
power detection before you can dial successfully. Turn off phantom
power detection by setting -PATH PhantomPower to Disable. For more
information on this parameter, refer to the software reference guide.
Ordering German ISDN BRI Services
To order German ISDN services for a SuperStack II bridge/router, follow
these steps:
1 Acquire a form entitled “Telefondienstauftrag im ISDN
(Euro-ISDN-Anschluß)” from the Telekom.
2 At the top of the form, select “Neuanschluß.”
3 Under “Auftraggeber,” provide the requested information.
4 Under “Anschluß,” specify “Basisanschluß als Standardanschluß.”
By specifying “Basisanschluß als Standardanschluß, “ you are requesting
standard basic rate interface (BRI) service. Under “Anschrift Standort,”
provide the requested information.
5 Under “Anschlußnutzung,” specify “Mehrgeräteanschluß.”
By specifying “Mehrgeräteanschluß,” you are requesting a connection
for multiple types of equipment, such as bridge/routers, telephones,
faxes, and computers.
6 Sign your name at the bottom of the form.
The SuperStack II bridge/router software does not currently support
the 1TR6 switch type. If you have an existing 1TR6 connection, request
that the connection be changed to a Euro-ISDN connection using this
form. In case the Telekom requests this information, the approval
number for Germany (Bundesamt Für Zulassungen In Der
Telekommunikation) is A115352E.
When ordering ISDN lines in Germany, make sure to order
point-to-multipoint ISDN lines. The SuperStack II bridge/router does not
support point-to-point configurations when attached to the German
ISDN network.
A-10 APPENDIX A: PROVISIONING YOUR ISDN LINE
B
TECHNICAL SUPPORT
3Com provides easy access to technical support information through a
variety of services. This appendix describes these services.
Information contained in this appendix is correct at time of
publication. For the very latest, we recommend that you access 3Com
Corporation’s World Wide Web site as described below.
Online Technical Services
World Wide Web Site Access the latest networking information on 3Com Corporation’s World
3Com Bulletin Board
Service
3Com offers worldwide product support 24 hours a day, 7 days a
week, through the following online systems:
■ World Wide Web site
■ 3Com Bulletin Board Service (3ComBBS)
■ 3ComFacts
■ 3ComForum on CompuServe
Wide Web site by entering our URL into your Internet browser:
http://www.3Com.com/
This service features the latest information about 3Com solutions and
technologies, customer service and support, news about the company,
NetAge
3ComBBS contains patches, software, and drivers for all 3Com
products, as well as technical articles. This service is available through
analog modem or digital modem (ISDN) 24 hours a day, 7 days a week.
®
SM
automated fax service
Magazine, and more.
®
online service
B-2 APPENDIX B: TECHNICAL SUPPORT
Access by Analog Modem
To reach the service by modem, set your modem to 8 data bits, no
parity, and 1 stop bit. Call the telephone number nearest you:
Country Data Rate Telephone Number
Australia up to 14400 bps 61 2 9955 2073
Brazil up to 14400 bps 55 11 547 9666
France up to 14400 bps 33 1 6986 6954
Germany up to 28800 bps 4989 62732 188
Hong Kong up to 14400 bps 852 2537 5608
Italy (fee required) up to 14400 bps 39 2 27300680
Japan up to 14400 bps 81 3 3345 7266
Mexico up to 28800 bps 52 5 520 7853
P. R. of China up to 14400 bps 86 10 684 92351
Singapore up to 14400 bps 65 534 5693
Taiwan up to 14400 bps 886 2 377 5840
U.K. up to 28800 bps 44 1442 438278
U.S.A. up to 28800 bps 1 408 980 8204
3ComFacts
Automated Fax
Service
Access by Digital Modem
ISDN users can dial in to 3ComBBS using a digital modem for fast
access up to 56 Kbps. To access 3ComBBS using ISDN, use the
following number:
408 654 2703
3Com Corporation’s interactive fax service, 3ComFacts, provides data
sheets, technical articles, diagrams, and troubleshooting instructions on
3Com products 24 hours a day, 7 days a week.
Call 3ComFacts using your Touch-Tone telephone using one of these
international access numbers:
Country Telephone Number
Hong Kong 852 2537 5610
U.K. 44 1442 438279
U.S.A. 1 408 727 7021
Support from Your Network Supplier B-3
Local access numbers are available within the following countries:
3ComForum on
CompuServe Online
Service
Telephone
Country
Australia 1800 678 515 Netherlands 06 0228049
Belgium 0800 71279 New Zealand 0800 446 398
Denmark 800 17319 Norway 800 11062
Finland 98 001 4444 Portugal 0505 442 607
France 05 90 81 58 Russia (Moscow only) 956 0815
Germany 0130 81 80 63 Singapore 800 6161 463
Hong Kong 800 933 486 Spain 900 964 445
Italy 1678 99085 Sweden 020 792954
Malaysia 1800 801 777 U.K. 0800 626403
Number
Country
Telephone
Number
3ComForum is a CompuServe-based service containing patches,
software, drivers, and technical articles about all 3Com products, as
well as a messaging section for peer support. To use 3ComForum, you
need a CompuServe account.
To use 3ComForum:
1 Log on to CompuServe.
2 Type
go threecom
Support from Your Network Supplier
3 Press [Return] to see the 3ComForum main menu.
If additional assistance is required, contact your network supplier.
Many suppliers are authorized 3Com service partners who are qualified
to provide a variety of services, including network planning, installation,
hardware maintenance, application training, and support services.
When you contact your network supplier for assistance, have the
following information ready:
■ Diagnostic error messages
■ A list of system hardware and software, including revision levels
■ Details about recent configuration changes, if applicable
If you are unable to contact your network supplier, see the following
section on how to contact 3Com.
B-4 APPENDIX B: TECHNICAL SUPPORT
Support from 3Com If you are unable to receive support from your network supplier,
technical support contracts are available from 3Com.
Contact your local 3Com sales office to find your authorized service
provider using one of these numbers:
Regional Sales Office Telephone Number
3Com Corporation
P.O. Box 58145
5400 Bayfront Plaza
Santa Clara, California
95052-8145
U.S.A.
3Com Asia Limited
Australia
China
Hong Kong
India
Indonesia
Japan
Korea
Malaysia
New Zealand
Phillippines
Singapore
Taiwan
Thailand
3Com Benelux B.V.
Belgium
Netherlands
3Com Canada
Calgary
Montreal
Ottawa
Toronto
Vancouver
3Com European HQ 49 89 627320
3Com France 33 1 69 86 68 00
800 NET 3Com or 1 408 764 5000
408 764 5001 (fax)
61 2 9937 5000 (Sydney)
61 3 9866 8022 (Melbourne)
8610 68492568 (Beijing)
86 21 63740220 Ext 6115
(Shanghai)
852 2501 1111
91 11 644 3974
6221 572 2088
81 6 536 3303 (Osaka)
81 3 3345 7251 (Tokyo)
822 2 319 4711
60 3 732 7910
64 9 366 9138
632 892 4476
65 538 9368
886 2 377 5850
662 231 8151 4
32 2 725 0202
31 30 6029700
403 265 3266
514 683 3266
613 566 7055
416 498 3266
604 434 3266
Regional Sales Office Telephone Number
3Com GmbH
Austria
Czech Republic/Slovak
Republic
Germany
(Central European HQ)
Hungary
Poland
Switzerland
3Com Ireland 353 1 820 7077
3Com Latin America
U.S. Headquarters
Northern Latin America
Argentina
Brazil
Chile
Colombia
Mexico
Peru
Venezuela
3Com Mediterraneo
Italy
Spain
3Com Middle East 971 4 349049
3Com Nordic AB
Denmark
Finland
Norway
Sweden
3Com Russia 007 095 258 09 40
3Com Southern Africa 27 11 807 4397
3Com UK Ltd. 44 131 220 8228 (Edinburgh)
43 1 513 4323
420 2 21845 800
49 30 34 98790 (Berlin)
49 89 627320 (Munich)
36 1 250 83 41
48 22 6451351
41 31 996 14 14
408 326 2093
305 261 3266 (Miami, Florida)
541 312 3266
55 11 546 0869
562 633 9242
571 629 4110
52 5 520 7841/7847
51 1 221 5399
58 2 953 8122
39 2 253011 (Milan)
39 6 5279941 (Rome)
34 1 383 17 00
45 39 27 85 00
358 0 435 420 67
47 22 18 40 03
46 8 632 56 00
44 161 873 7717 (Manchester)
44 162 889 7000 (Marlow)
Returning Products for Repair B-5
Returning Products for Repair
04/22/97
Before you send a product directly to 3Com for repair, you must first
obtain a Return Materials Authorization (RMA) number. Products sent
to 3Com without RMA numbers will be returned to the sender
unopened, at the sender’s expense.
To obtain an RMA number, call or fax:
Country Telephone Number Fax Number
U.S.A. and Canada 1 800 876 3266, option 2 408 764 7120
Latin America 1 408 326 2927 408 764 7120
Europe, South Africa, and
Middle East
Outside Europe, U.S.A., and
Canada
44 1442 438125 44 1442 435822
1 408 326 2926 1 408 764 7120
INDEX
Numerics
3Com Bulletin Board Service (3ComBBS) B-1
3Com sales offices B-4
3Com URL B-1
3ComFacts B-2
3ComForum B-3
A
AT&T 5ESS switch
custom, ordering
standard, ordering A-4
auxiliary power 2-8
A-5
B
back panel 2-3
bulletin board service B-1
C
cables
console
2-3
ISDN 2-20
modem 2-6
PC 2-4
RS-232 to RS-232 DCE 2-17
RS-232 to RS-232 direct connect 2-18
STP 2-7
terminal 2-5
token ring 2-6
UNIVERSAL to RS-232 DCE 2-15
UNIVERSAL to RS-232 direct connect 2-16
UTP 2-6
V.35 adapter 2-11
V.35 DCE straight-through 2-9
V.35 direct connect 2-10
V.36 DCE 2-13
V.36 direct connect 2-14
X.21 adapter 2-19
cabling
console
1-11
ISDN 1-6
serial connectors 1-7
token ring 1-6
chassis panels 2-2
CompuServe B-3
connectors
STP
2-7
token ring 2-6, 2-7
UTP 2-6
console
attaching
cables 2-3
conventions
notice icons, About This Guide
cover
reinstalling
removing 3-1
1-11
3-3
D
DCE-like mode 1-7
deleted image files 4-2
DMS 100 switch, ordering A-6
DRAM 2-1
DTE mode 1-7
E
equipment required 1-1
F
fax service. See 3ComFacts
feet, attaching
flash memory 2-1
front panel 2-2
1-3
G
German ISDN BRI services A-9
H
hardware interrupt switch 2-3
1
2 INDEX
I
IBM cluster controller 1-7
installing
in a rack
on a tabletop 1-3
stacking with brackets 1-4
ISDN
acquiring telecommunication services
cable 2-20
German BRI services A-9
information sheet A-2
North American BRI services A-1
phantom power A-9
provisioning tables A-3
SPIDs A-7
1-4
L
LEDs
meanings
normal 4-1
loading software, troubleshooting 4-2
4-3
M
memory
installing
upgrading 2-1, 3-1
model features 2-1
modem cable 2-6
modem eliminator 1-5
monitor utility 2-3
mounting
in a rack
on a tabletop 1-3
stacking units 1-4
3-2
1-4
A-9
R
rack-mount installation 1-4
rack-mount kit 1-3
Redundant Power System (RPS)
attaching
cable 1-10
required equipment 1-1
returning products for repair B-5
RS-232 cable
RS-232 to RS-232 DCE
RS-232 to RS-232 direct connect 2-18
UNIVERSAL to DCE 2-15
UNIVERSAL to direct connect 2-16
1-10
2-17
S
serial connector
active ports
cabling information 1-7
DCE-like mode 1-8
DTE mode 1-8
shipping carton contents 1-1
shutting down 1-12
Siemens EWSD switch, ordering A-7
software recovery 1-2
specifications 2-21
SPIDs A-7
stacking units with mounting brackets 1-4
STP
cable
connector 2-7
switches
AT&T 5ESS
AT&T 5ESS (custom) A-5
DMS 100 A-6
National A-6
Siemens EWSD A-7
2-1
2-7
A-4
N
National switch, ordering A-6
network supplier support B-3
NT1 1-6, A-8
O
online technical services B-1
P
PC cable 2-4
PhantomPower parameter A-9
physical specifications 2-21
power supply redundancy 1-10
power, turning off 1-12
T
tabletop installation 1-3
technical support
3Com URL
bulletin board service B-1
fax service B-2
network suppliers B-3
product repair B-5
using CompuServe B-3
terminal
configuration settings
terminal cable 2-5
token ring
cables
connectors 2-6, 2-7
B-1
2-6, 2-7
1-11
token ring connection, troubleshooting 4-4
troubleshooting
deleted image files
during test phase 4-2
LED meanings 4-3
load errors 4-2
load phase 4-2
token ring connection 4-4
4-2
U
upgrading memory 3-1
URL B-1
UTP
cable
2-6
connector 2-6
V
V.35 cable
adapter
2-11
DCE straight-through 2-9
direct connect 2-10
V.36 cable
DCE
2-13
direct connect 2-14
INDEX 3
W
World Wide Web (WWW) B-1
X
X.21 adapter cable 2-19
4 INDEX
3Com Corporation LIMITED WARRANTY
HARDWARE 3Com warrants its hardware products to be free from defects in workmanship and materials, under
normal use and service, for the following lengths of time from the date of purchase from 3Com or its
Authorized Reseller:
Network adapters Lifetime
Other hardware products (unless otherwise specified above) 1 year
Spare parts and spares kits 90 days
If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at
its option and expense, repair the defective product or part, deliver to Customer an equivalent product or
part to replace the defective item, or refund to Customer the purchase price paid for the defective
product. All products that are replaced will become the property of 3Com. Replacement products may be
new or reconditioned. Any replaced or repaired product or part has a ninety (90) day warranty or the
remainder of the initial warranty period, whichever is longer.
3Com shall not be responsible for any software, firmware, information, or memory data of Customer
contained in, stored on, or integrated with any products returned to 3Com for repair, whether under
warranty or not.
SOFTWARE 3Com warrants that the software programs licensed from it will perform in substantial conformance to the
program specifications therefor for a period of ninety (90) days from the date of purchase from 3Com or
its Authorized Reseller. 3Com warrants the media containing software against failure during the warranty
period. No updates are provided. 3Com’s sole obligation with respect to this express warranty shall be (at
3Com’s discretion) to refund the purchase price paid by Customer for any defective software products, or
to replace any defective media with software which substantially conforms to 3Com’s applicable published
specifications. Customer assumes responsibility for the selection of the appropriate applications program
and associated reference materials. 3Com makes no warranty or representation that its software products
will work in combination with any hardware or applications software products provided by third-parties,
that the operation of the software products will be uninterrupted or error free, or that all defects in the
software products will be corrected. For any third-party products listed in the 3Com software product
documentation or specifications as being compatible, 3Com will make reasonable efforts to provide
compatibility, except where the noncompatibility is caused by a “bug” or defect in the third-party’s
product.
STANDARD WARRANTY
S
ERVICE
Standard warranty service for hardware products may be obtained by delivering the defective product,
accompanied by a copy of the dated proof of purchase, to 3Com’s Corporate Service Center or to an
Authorized 3Com Service Center during the applicable warranty period. Standard warranty service for
software products may be obtained by telephoning 3Com’s Corporate Service Center or an Authorized
3Com Service Center, within the warranty period. Products returned to 3Com’s Corporate Service Center
must be pre-authorized by 3Com with a Return Material Authorization (RMA) number marked on the
outside of the package, and sent prepaid, insured, and packaged appropriately for safe shipment. The
repaired or replaced item will be shipped to Customer, at 3Com’s expense, not later than thirty (30) days
after receipt of the defective product by 3Com.
WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER’S SOLE REMEDY FOR
BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE
PAID, AT 3COM’S OPTION. TO THE FULL EXTENT ALLOWED BY LAW, THE FOREGOING WARRANTIES AND
REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, TERMS, OR CONDITIONS,
EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE,
INCLUDING WARRANTIES, TERMS, OR CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, AND SATISFACTORY QUALITY. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER
PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION,
MAINTENANCE, OR USE OF ITS PRODUCTS.
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE
THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER’S OR
ANY THIRD PERSON’S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED
ATTEMPTS TO REPAIR OR MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE,
OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
LIMITATION OF LIABILITY 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,
CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE
OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR DATA, OR OTHER FINANCIAL LOSS ARISING
OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE,
FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT,
OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM’S OPTION. THIS DISCLAIMER OF LIABILITY FOR
DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL
PURPOSE.
Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the
limitation of incidental or consequential damages for certain products supplied to consumers or the
limitation for personal injury, so the above limitations and exclusions may be limited in their application to
you. This warranty gives you specific legal rights which may vary depending on local law.
GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of California.
3Com Corporation, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145 (408) 764-5000
9/1/96
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