3Com Switch 3C16592B 3C16593B User Manual

SuperStack® 3 Baseline Dual Speed Hub 12-Port TP (3C16592B) and  
24-Port TP (3C16593B) User Guide  
DUA1659-2AAA04  
3C16593B  
SuperStack  
®
3
INTRODUCTION  
®
The SuperStack 3 Baseline Dual Speed Hub is an easy-to-use, 10/100  
Network Connections  
autosensing Class II hub (repeater). It is ideal for users who want to con-  
nect both Ethernet and Fast Ethernet devices (workstations and other  
equipment) to the same hub.  
The Baseline Dual Speed Hub has 12 or 24 shielded RJ-45, 10/100  
autosensing ports on the front panel. Each port can be connected to  
either a 10BASE-T (Ethernet) or a 100BASE-TX (Fast Ethernet) device.  
All ports on the Baseline Dual Speed Hub are half duplex, autosensing  
10 Mbps and 100 Mbps. Each port senses the speed of the connected  
equipment and operates at the appropriate speed.  
Internally, the hub has two repeater segments (10 Mbps and 100 Mbps)  
which are linked by a switch, allowing connected 10 Mbps and 100 Mbps  
devices to communicate.  
The Baseline Dual Speed Hub comes with:  
You can connect a 10BASE-T or 100BASE-TX hub or switch to the Base-  
line Dual Speed Hub.  
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!
One power cord for use with the Baseline Dual Speed Hub  
Four standard height and two reduced height, self-adhesive rubber  
pads  
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One rack mounting kit  
A card with details of online registration  
The Baseline Dual Speed Hub is suitable for office use where it can be free  
standing or rack-mounted (in a wiring closet or equipment room). The  
hub can be powered either from the AC mains supply, or through an  
®
optional 3Com SuperStack Advanced Redundant Power System  
(3C16071B). Contact your supplier for details.  
1
 
To connect the hub to a 10 Mbps or 100 Mbps unit, connect an MDIX  
port on the unit to port 12 or 24 on the Hub, as shown above. Ensure  
that the MDI switch on the Hub is in (MDI). If an MDI/MDIX port is used  
on the other unit, ensure that the MDI switch for that port is out (MDIX).  
Alternatively, you can use “cross-over” TP cable to connect any MDIX port  
on the Baseline Dual Speed Hub to any MDIX port on another unit.  
For normal redundancy, the ARPS requires one Type 1 Power Module (part  
number 3C16072). For full redundancy, the unit requires two Type 1  
Power Modules combined using a Type 1 Y-Cable (part number 3C16079).  
Contact your supplier for further details.  
8
Self-adhesive Pads  
The hub is supplied with six self-adhesive rubber pads: two reduced  
height and four full height.  
3
Status LEDs  
The Status LEDs show the state of a port and whether or not the Link  
Pulse signal is present on the segment connected to a port:  
You do not need to apply the pads if you intend to rack mount  
the unit.  
If you are placing the units one on top of the other, you must use the  
self-adhesive rubber pads supplied. Apply the pads to the underside of  
each unit, sticking one in the marked area at each corner. Place the units  
on top of each other, ensuring that the pads of the upper unit line up  
with the recesses of the lower unit. Use the two thinner pads when  
stacking the unit with a narrower one above.  
Green  
A 100 Mbps Link Pulse signal is being received and the  
100BASE-TX segment attached to the port is functional.  
Yellow  
A 10 Mbps Link Pulse signal is being received and the 10BASE-T  
segment attached to the port is functional.  
Flashing  
yellow  
The port has partitioned, due to an excessive number of collisions,  
excessively long collisions, or a network loop. To remove a  
network loop, examine your connections and ensure that each  
piece of equipment is connected to your network by only one  
connection.  
Positioning the Baseline Dual Speed Hub  
CAUTION: When installing the Baseline Dual Speed Hub in a  
stack of different size units, the Baseline Dual Speed Hub must  
Off  
The Link Pulse signal is not being received. Either nothing is  
connected to the port, or there is a problem:  
be installed above any larger units. Do not have a free standing  
stack of more than six units.  
!
Check that the attached device is powered on.  
When deciding where to position the Baseline Dual Speed Hub ensure:  
Check that the cable is the correct type and is not faulty.  
!
!
It is accessible and cables can be connected easily.  
Cabling is away from:  
If the LED is off for port 12 or 24, check the setting of the MDI  
switch. Refer to 2. Try toggling the MDI switch.  
If you have connected different types of unit together, check that  
your configuration conforms to the network configuration rules  
for 10BASE-T and 100BASE-TX.  
Sources of electrical noise such as radios, transmitters and broad-  
band amplifiers.  
If the port is connected to another unit’s MDI/MDIX port, check  
the other unit’s MDI switch position.  
Power lines and fluorescent lighting fixtures.  
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!
Water or moisture cannot enter the case of the unit.  
Air flow around the unit and through the vents in the side of the case  
is not restricted (3Com recommends that you provide a minimum of  
25 mm (1 in.) clearance).  
If these checks do not identify the cause of a problem, it may be that the  
unit or the device connected to the port is faulty. Contact your supplier  
for further advice.  
To prolong the operational life of your units:  
4
Segment LEDs  
!
Never stack units more than six high if free standing, and ensure that  
cables are supported so that they do not cause the stack to fall over.  
The Segment LEDs indicate activity on the 10 Mbps and 100 Mbps  
segments:  
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!
Do not place objects on top of any unit or stack.  
Do not obstruct any vents at the sides of the case.  
Flashing  
green  
Packets are being received or transmitted.  
Flashing  
yellow  
Collisions are occurring on the segment. A low level of collisions is  
a part of normal Ethernet and Fast Ethernet operation. Excessive  
collisions may indicate a network problem.  
Power Supply  
Power problems can be the cause of serious failures and downtime in  
your network. Ensure that the power input to your system is clean and  
free from sags and surges to avoid unforeseen network outages. 3Com  
recommends that you install power conditioning, especially in areas prone  
to black outs, power dips and electrical storms.  
Off  
No packets are being received or transmitted on the segment.  
5
Power LED  
The unit is intended to be grounded. Ensure it is connected to earth  
ground during normal use. Installing proper grounding helps to avoid  
damage from lightning and power surges.  
The Power LED indicates a number of conditions:  
Green  
Off  
The unit is powered on and ready for use.  
The unit is powered off.  
Rack Mounting  
The Baseline Dual Speed Hub can be mounted in a 19-in. equipment rack.  
Refer to the “Mounting Kit Instructions” section in this guide.  
The power cable may be connected incorrectly or the fuse within  
the power cord’s plug may be faulty (UK models only).  
If the unit appears to be operating and the LED is off, contact  
your supplier.  
Power Up  
Use the following sequence to power up the Baseline Dual Speed Hub:  
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Check the network connections and cables.  
Rear Panel Connections  
Connect the power supply cable to the appropriate power socket on  
the rear panel of the unit; refer to 6 or 7.  
6
Power Supply  
!
Connect the plug to the mains power supply outlet socket. If you are  
using the Advanced Redundant Power System refer to the ARPS User  
Guide.  
The Baseline Dual Speed Hub automatically adjusts to the supply voltage.  
Only use the power cord that is supplied with the Baseline Dual Speed  
Hub, or a power cord of the same type and rating.  
When the Baseline Dual Speed Hub is powered on, the Power LED should  
be lit. If it is not, refer to 5, “Power LED”.  
7
Socket for Redundant Power System  
You can connect a 3Com SuperStack Advanced Redundant Power System  
(ARPS) (3C16071/A/B) to the Hub. The ARPS is designed to maintain the  
power to your Hub if a power supply failure occurs.  
3
 
   
SAFETY INFORMATION  
Power Cord Set  
This must be approved for the country where it will be used. e.g.  
Please read the following safety information carefully before  
installing the Baseline Dual Speed Hub.  
U.S.A. and  
Canada  
The cord set must be UL-approved and CSA certified.  
WARNING: Installation and removal of the unit must be carried out by  
qualified personnel only.  
The minimum specifications for the flexible cord are:  
No. 18 AWG  
Type SV or SJ  
3-conductor  
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!
!
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The unit must be connected to an earthed (grounded) outlet to comply with  
international safety standards.  
Do not connect the unit to an A.C. outlet (power supply) without an earth  
(ground) connection.  
The cord set must have a rated current capacity of at least  
10A.  
The appliance coupler (the connector to the unit and not the wall plug) must  
have a configuration for mating with an EN60320/IEC320 appliance inlet.  
The attachment plug must be an earth-grounding type with a  
NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A, 250V)  
configuration.  
The socket outlet must be near to the unit and easily accessible. You can only  
remove power from the unit by disconnecting the power cord from the  
outlet.  
Denmark  
The supply plug must comply with Section 107-2-D1,  
Standard DK2-1a or DK2-5a.  
!
!
This unit operates under SELV (Safety Extra Low Voltage) conditions according  
to IEC 60. The conditions are only maintained if the equipment to which it is  
connected also operates under SELV conditions.  
Switzerland  
UK  
The supply plug must comply with SEV/ASE 1011.  
Only connect an Advanced Redundant Power System (3C16070, 3C16071,  
3C16071A or 3C16071B) or Redundant Power System (3C565047) to the  
Redundant Power System socket.  
The supply plug must comply with BS1363 (3-pin 13-amp)  
and be fitted with a 5A fuse which complies with BS1362.  
The mains cord must be <HAR> or <BASEC> marked and be  
of type HO3VVF3GO.75 (minimum).  
France and Peru only  
This unit cannot be powered from ITsupplies. If your supplies are of IT type, this  
unit must be powered by 230V (2P+T) via an isolation transformer ratio 1:1, with the  
secondary connection point labelled Neutral, connected directly to earth (ground).  
Europe  
The supply plug must comply with CEE7/7 (“SCHUKO”)  
The mains cord must be <HAR> or <BASEC> marked and be  
of type HO3VVF3GO.75 (minimum).  
Impédance à la terre  
LINFORMATION DE SÉCURITÉ IMPORTANTE  
Cordon électrique  
Il doit être agréé dans le pays d’utilisation.  
Veuillez lire à fond l'information de la sécurité suivante avant  
d'installer le Baseline Dual Speed Hub.  
Etats-Unis  
et Canada  
Le cordon doit avoir reçu l’homologation des UL et un  
certificat de la CSA.  
AVERTISSEMENT: Linstallation et la dépose de ce groupe doivent être  
confiés à un personnel qualifié.  
Le cordon souple doit respecter, à titre minimum, les  
spécifications suivantes:  
calibre 18 AWG  
type SV ou SJ  
à 3 conducteurs  
!
!
!
Ne branchez pas votre appareil sur une prise secteur (alimentation électrique)  
lorsqu'il n'y a pas de connexion de mise à la terre (mise à la masse).  
Vous devez raccorder ce groupe à une sortie mise à la terre (mise à la masse)  
afin de respecter les normes internationales de sécurité.  
Le coupleur d’appareil (le connecteur du groupe et non pas la prise murale)  
doit respecter une configuration qui permet un branchement sur une entrée  
d’appareil EN60320/IEC 320.  
Le cordon doit être en mesure d’acheminer un courant  
nominal d’au moins 10 A.  
La prise femelle de branchement doit être du type à mise à  
la terre (mise à la masse) et respecter la configuration NEMA  
5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V).  
!
!
!
La prise secteur doit se trouver à proximité de l’appareil et son accès doit être  
facile. Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant son  
cordon électrique au niveau de cette prise.  
Danemark  
Suisse  
La prise mâle d’alimentation doit respecter la section 107-2  
D1 de la norme DK2 1a ou DK2 5a.  
Lappareil fonctionne à une tension extrêmement basse de sécurité qui est  
conforme à la norme IEC60950. Ces conditions ne sont maintenues que si  
l’équipement auquel il est raccordé fonctionne dans les mêmes conditions.  
La prise mâle d’alimentation doit respecter la norme SEV/ASE  
1011.  
Branchez uniquement un Advanced Redundant Power System (3C16070,  
3C16071, 3C16071A ou 3C16071B) ou un Redundant Power System  
(3C565047) sur la prise femelle du Redundant Power System.  
Europe  
La prise secteur doit être conforme aux normes CEE 7/7  
(“SCHUKO”)  
France et Pérou uniquement:  
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la terre. Si vos  
alimentations sont du type impédance à la terre, ce groupe doit être alimenté par  
une tension de 230 V (2 P+T) par le biais d’un transformateur d’isolement à rapport  
1:1, avec un point secondaire de connexion portant l’appellation Neutre et avec  
raccordement direct à la terre (masse).  
LE cordon secteur doit porter la mention <HAR> ou  
<BASEC> et doit être de type HO3VVF3GO.75 (minimum).  
WICHTIGE SICHERHEITSINFORMATIONEN  
Stromkabel  
Bitte unbedingt vor dem Einbauen des Baseline Dual Speed Hub  
Einheit die folgenden Sicherheitsanweisungen durchlesen.  
Dies muss von dem Land, in dem es benutzt wird geprüft werden:  
Schweiz  
Europe  
Dieser Stromstecker muß die SEV/ASE 1011Bestimmungen  
einhalten.  
WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch  
Fachpersonal erfolgen.  
!
!
!
Das Gerät nicht an eine Wechselstromsteckdose anschließen, die nicht  
geerdet ist.  
Das Netzkabel muß vom Typ HO3VVF3GO.75  
(Mindestanforderung) sein und die Aufschrift <HAR> oder  
<BASEC> tragen.  
Das Gerät muß an eine geerdete Steckdose angeschlossen werden, die die  
internationalen Sicherheitsnormen erfüllt.  
Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”).  
Der Gerätestecker (der Anschluß an das Gerät, nicht der  
Wandsteckdosenstecker) muß eine passende Konfiguration für einen  
Geräteeingang gemäß EN60320/IEC320 haben.  
!
!
Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein.  
Die Stromversorgung des Geräts kann nur durch Herausziehen des  
Gerätenetzkabels aus der Netzsteckdose unterbrochen werden.  
Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen  
(Sicherheitskleinstspannung) gemäß IEC 60. Diese Bedingungen sind nur  
gegeben, wenn auch die an das Gerät angeschlossenen Geräte unter  
SELV-Bedingungen betrieben werden.  
!
Nur ein Advanced Redundant Power System (3C16070, 3C16071,3C16071A  
oder 3C16071B) oder Redundant Power System (3C565047) an den  
Redundant Power System Anschluß anschließen.  
4
 
MOUNTING KIT INSTRUCTIONS  
The Baseline Dual Speed Hub is supplied with two mounting brackets and  
four screws. These are used for rack mounting the unit. When mounting  
the unit, you should take note of the guidelines given in “Positioning the  
The Baseline Dual Speed Hub is 1U high and will fit a standard 19-inch  
rack.  
CAUTION: Disconnect all cables from the unit before continuing.  
Remove the self-adhesive pads from the underside of unit, if  
already fitted.  
To rack mount the unit:  
1
2
3
Place the unit the right way up on a hard, flat surface with the  
front facing towards you.  
Locate a mounting bracket over the mounting holes on one side of  
the unit, as shown in the diagram.  
Insert the two screws supplied in the mounting kit and fully tighten  
with a suitable screwdriver.  
4
5
Repeat the two previous steps for the other side of the unit.  
Insert the unit into the 19-in. rack and secure with suitable screws  
(not provided).  
6
Reconnect all cables.  
PROBLEM SOLVING  
Refer to the information about LEDs given earlier in this guide to see if  
the problem can be identified and rectified. If the problem persists and  
the Baseline Dual Speed Hub still does not operate successfully, contact  
your supplier with the following information before returning the unit:  
When returning any equipment to your supplier ensure that the  
equipment is packed suitably for transit.  
Some older NIC (network interface card) cards were developed  
before the standardization of the auto-negotiation protocol.  
These may cause the Baseline Dual Speed Hub to sense the  
speed of the network incorrectly. We strongly recommend that  
you install the latest versions of the NIC drivers before connect-  
ing your network. 3Com NIC card drivers dated before 23/03/95  
should be updated from the 3Com website.  
!
Product number and serial number  
(printed on a label on the rear of the unit)  
!
A brief description of the fault  
TECHNICAL INFORMATION  
Related Standards  
Electrical  
The SuperStack 3 Baseline Dual Speed Hub has been designed to the fol-  
lowing standards:  
Power Inlet  
IEC 320  
AC Line Frequency  
Power Consumption  
50/60 Hz  
3C16592B: 25 VA  
3C16593B: 42 VA  
Functional  
Safety  
ISO/IEC 8802-3, IEEE 802.3, IEEE 802.3u, IEEE 802.1D  
UL 1950, EN 60950, CSA 22.2 #950, IEC 60950  
Power Dissipation  
3C16592B: 86 BTU/hr  
3C16593B: 142 BTU/hr  
EMC Emissions  
EN 55022 Class A, VCCI Class A, AS/NZS 3548 Class A,  
FCC Part 15 Class A, ICES-003 Class A, CNS 13438,  
EN61000-3-3, EN61000-3-2.  
Input Voltage  
Current Rating  
100–240 V AC  
3C16592B: 1.0 A (maximum)  
3C16593B: 1.0 A (maximum)  
Immunity  
EN55024  
Physical  
Environmental  
Operating Temperature  
Width  
Depth  
Height  
Weight  
440 mm (17.3 in.)  
173 mm (6.8 in.)  
0–50 °C (32–122 °F)  
Humidity  
0–95 % (non-condensing)  
44 mm (1.7 in.) or 1 U  
3C16592B: 2.22 kg (4.90 lb)  
3C16593B: 2.10 kg (4.63 lb)  
Mounting  
Free standing, or 19 in. rack mounted using the mounting  
kit supplied  
5
 
LIMITED WARRANTY  
shipment of a replacement product prior to 3Com receiving the defective product is  
subject to local legal requirements and may not be available in all locations. When  
such a replacement is provided and Customer fails to return the original product to  
3Com within fifteen (15) days after shipment of the replacement, 3Com will charge  
Customer for the replacement product, at list price.  
This warranty applies to customers located in the United States, Australia, Canada  
(except Quebec), Ireland, New Zealand, U.K., and other English language countries,  
and countries for which a translation into the local language is not provided.  
SuperStack 3 Baseline Dual Speed Hub 12-Port TP (3C16592B) and 24-Port TP  
(3C16593B)  
Shipment of a Replacement Prior to 3Com Receiving the Defective Product is  
provided for five (5) years, after which time it may be available for a specified fee,  
but in either case only if Customer provides a purchase order number, credit card  
number, or other method of payment acceptable to 3Com, to be used if 3Com  
needs to charge Customer for the replacement, as explained below. 3Com will make  
commercially reasonable efforts to ship the replacement product not later than five  
(5) business days after receiving the request for a replacement, but may be delayed  
due to product availability or export or import procedures. The shipment of a  
replacement product prior to 3Com receiving the defective product is subject to local  
legal requirements and may not be available in all locations. When such a  
replacement is provided and Customer fails to return the original product to 3Com  
within fifteen (15) days after shipment of the replacement, 3Com will charge  
Customer for the replacement, at list price. This replacement prior to 3Com receiving  
the defective product is different from the fee-based Advance Hardware Replacement  
Service, which is available as a contracted service offering.  
HARDWARE: 3Com warrants to the end user ("Customer") that this hardware  
product will be free from defects in workmanship and materials, under normal use  
and service, for the following length of time from the date of purchase from 3Com  
or its authorized reseller:  
Lifetime, for as long as the original Customer owns the product (not transferable to  
a subsequent end user)  
3Com's sole obligation under this express warranty shall be, at 3Com's option and  
expense, to repair the defective product or part, deliver to Customer an equivalent  
product or part to replace the defective item, or if neither of the two foregoing  
options is reasonably available, 3Com may, in its sole discretion, refund to Customer  
the purchase price paid for the defective product. All products that are replaced will  
become the property of 3Com. Replacement products or parts may be new or  
reconditioned. 3Com warrants any replaced or repaired product or part for ninety  
(90) days from shipment, or the remainder of the initial warranty period, whichever  
is longer.  
INCLUDED SERVICES:  
SOFTWARE: 3Com warrants to Customer that each software program licensed from  
it, except as noted below, will perform in substantial conformance to its program  
specifications, 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, unless specifically  
included in the Included Services section. 3Com's sole obligation under this express  
warranty shall be, at 3Com's option and expense, to refund the purchase price paid  
by Customer for any defective software product, or to replace any defective media  
with software which substantially conforms to applicable 3Com 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 meet Customer's requirements or  
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 non-compatibility is caused by a "bug" or defect in the third  
party's product or from use of the software product not in accordance with 3Com's  
published specifications or user manual.  
3Com's Electronic Support Services, available at no charge, include 3Com  
Knowledgebase, information on known bugs, documentation, release notes, and  
publicly available software and firmware upgrades. 3Com reserves the right to  
modify or cancel this offering at any time, without advance notice.  
Telephone Technical Support, with coverage for basic troubleshooting only, will be  
provided at no additional charge for 12 months from the date of purchase, on a  
commercially reasonable efforts basis. Telephone support is provided by 3Com only if  
Customer purchased this product directly from 3Com, or if Customer's reseller is  
unable to provide telephone support. To qualify for this telephone technical support,  
Customer must register on the 3Com Web site at  
number, and serial number. 3Com's response to a request for telephone technical  
support will be in the form of a return call from a 3Com representative by close of  
business the following business day, defined as 9 a.m. to 5 p.m., local time, Monday  
through Friday, excluding local holidays. Please refer to the Technical Support  
appendix in the User Guide for telephone numbers.  
Software Updates, All software and firmware upgrades and the latest code for this  
product downloaded through the 3Com Software Library.  
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, SATISFACTORY QUALITY, CORRESPONDENCE WITH  
DESCRIPTION, AND NON-INFRINGEMENT, ALL OF WHICH ARE EXPRESSLY  
DISCLAIMED. 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 OR MALFUNCTION 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 OPEN, REPAIR OR MODIFY THE PRODUCT, OR ANY OTHER CAUSE  
BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING,  
POWER CUTS OR OUTAGES, OTHER HAZARDS, OR ACTS OF GOD.  
THIS 3COM PRODUCT MAY INCLUDE OR BE BUNDLED WITH (1) THIRD PARTY  
SOFTWARE, OR (2) 3COM SOFTWARE THAT IS LICENSED "AS IS", THE USE OF  
WHICH IS GOVERNED BY A SEPARATE END USER LICENSE AGREEMENT. THIS 3COM  
WARRANTY DOES NOT APPLY TO SUCH THIRD PARTY SOFTWARE OR 3COM  
SOFTWARE LICENSED "AS IS". FOR THE APPLICABLE WARRANTY, PLEASE REFER TO  
THE END USER LICENSE AGREEMENT GOVERNING THE USE OF SUCH SOFTWARE OR  
THE ACCOMPANYING DOCUMENTATION RELATING TO SUCH SOFTWARE.  
YEAR 2000 WARRANTY: In addition to the Hardware Warranty and Software  
Warranty stated above, 3Com warrants that each product sold or licensed to  
Customer on and after January 1, 1998 that is date sensitive will continue  
performing properly with regard to such date data on and after January 1, 2000,  
provided that all other products used by Customer in connection or combination  
with the 3Com product, including hardware, software, and firmware, accurately  
exchange date data with the 3Com product, with the exception of those products  
meeting this standard. If it appears that any product that is stated to meet this  
standard does not perform properly with regard to such date data on and after  
January 1, 2000, and Customer notifies 3Com within ninety (90) days after purchase  
of the product from 3Com or its authorized reseller, 3Com shall, at its option and  
expense, provide a software update which would effect the proper performance of  
such product, repair such product, deliver to Customer an equivalent product to  
replace such product, or if none of the foregoing is feasible, refund to Customer the  
purchase price paid for such product.  
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.  
Any software update or replaced or repaired product will carry a Year 2000 Warranty  
for ninety (90) days after purchase.  
OBTAINING WARRANTY SERVICE: Customer must contact a 3Com Corporate  
Service Center or an Authorized 3Com Service Center within the applicable warranty  
period to obtain warranty service authorization. Dated proof of purchase from 3Com  
or its authorized reseller may be required. Products returned to 3Com's Corporate  
Service Center must be pre-authorized by 3Com with a User Service Order (USO)  
number (or a Return Material Authorization (RMA) number or a Service Repair Order  
(SRO) number, whichever was issued) marked on the outside of the package, and  
sent prepaid and packaged appropriately for safe shipment, and it is recommended  
that they be insured or sent by a method that provides for tracking of the package.  
Responsibility for loss or damage does not transfer to 3Com until the returned item  
is received by 3Com. The repaired or replaced item will be shipped to Customer, at  
3Com's expense, not later than thirty (30) days after 3Com receives the defective  
product, and 3Com will retain risk of loss or damage until the item is delivered to  
Customer.  
DISCLAIMER: 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 of liability for  
personal injury, so the above limitations and exclusions may be limited in their  
application to you. When the implied warranties are not allowed to be excluded in  
their entirety, they will be limited to the duration of the applicable written warranty.  
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, U.S.A., and by the laws of the United States, excluding their conflicts  
of laws principles. The United Nations Convention on Contracts for the International  
Sale of Goods is hereby excluded in its entirety from application to this Limited  
Warranty.  
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.  
Dead- or Defective-on-Arrival. In the event a product completely fails to function  
or exhibits a defect in materials or workmanship within the first forty-eight (48)  
hours of installation but no later than thirty (30) days after the date of purchase, and  
this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and  
a replacement shall be provided prior to 3Com receiving the defective product, but  
only if Customer provides a purchase order number, credit card number, or other  
method of payment acceptable to 3Com, to be used if 3Com needs to charge  
Customer for the replacement, as explained below. The replacement product will  
normally be shipped not later than three (3) business days after 3Com's verification  
of the DOA product, but may be delayed due to export or import procedures. The  
3Com Corporation  
5400 Bayfront Plaza  
P.O. Box 58145  
Santa Clara, CA 95052-8145  
(408) 326-5000  
January 2001  
3Com reserves the right to modify or cancel this offering at any time, without  
advance notice. This offering is not available where prohibited or restricted by law.  
6
 
TECHNICAL SUPPORT  
The following options are available for technical support:  
!
!
!
In the first instance contact your Network Supplier  
Check the 3Com knowledgebase at http://knowledgebase.3com.com  
Browse the 3Com web site on http://www.3com.com  
Please have your product model name, part number, hardware revision number and serial number along with all relevant details of the problem to hand  
before calling your Network Supplier or 3Com on the numbers below.  
Country  
Telephone Number  
Country  
Telephone Number  
Asia, Pacific Rim  
Australia  
Hong Kong  
India  
Indonesia  
Japan  
Malaysia  
Philippines  
P.R. of China  
1235 61 266 2602  
1 800 678 515  
800 933 486  
+61 2 9937 5085 or 0008006501111  
001 800 61 009  
03 5783 1270  
1800 801 777  
0800 446 398  
+61 2 9937 5083  
10800 61 00137 or 021 6350 1590  
or 00800 0638 3266  
800 6161 463  
Singapore  
S. Korea  
From anywhere in S. Korea:  
From Seoul:  
Taiwan, R.O.C.  
Thailand  
00798 611 2230  
(0)2 3455 6455  
0080 611 261  
New Zealand  
Pakistan  
001 800 611 2000  
Europe, Middle East and Africa  
From anywhere in these regions,  
call:  
+44 (0) 1442 435529 phone  
+44 (0) 1442 436722 fax  
Europe and South Africa: From the following countries, you may use the toll-free numbers:  
Austria  
Belgium  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
Israel  
0800 297468  
0800 71429  
800 17309  
0800 113153  
0800 917959  
0800 1821502  
06800 12813  
1800 553117  
1800 9453794  
800 8 79489  
Luxembourg  
Netherlands  
Norway  
0800 3625  
0800 0227788  
800 11376  
00800 3111206  
0800 831416  
0800 995014  
900 983125  
020 795482  
0800 55 3072  
0800 966197  
Poland  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
Italy  
Latin America  
Brazil  
0800 13 3266  
Puerto Rico  
800 666 5065  
Mexico  
01 800 849CARE  
Central and South America  
AT&T +800 998 2112  
North America  
1 800 NET 3Com (1 800 638 3266)  
Enterprise Customers: 1 800 876 3266  
REGULATORY NOTICES  
FCC Statement  
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  
radiate radio frequency energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio communications. Operation of  
this equipment in a residential area is likely to cause harmful interference to radio  
communications, in which case the user will be required to correct the interference  
at their own expense.  
CE Statement (Europe)  
This product complies with the European Low Voltage Directive 73/23/EEC and EMC  
Directive 89/336/EEC as amended by European Directive 93/68/EEC/.  
CSA Statement  
This Class A digital apparatus meets all requirements of the Canadian  
Interference-Causing Equipment Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement  
sur le matériel brouilleur du Canada.  
Information To The User  
VCCI Statement  
BSMI Statement  
If this equipment does cause interference to radio or television reception, which can  
be determined by turning the equipment off and on, the user is encouraged to try  
to correct the interference by one or more of the following measures:  
Reorient the receiving antenna.  
Relocate the equipment with respect to the receiver.  
Move the equipment away from the receiver.  
Plug the equipment into a different outlet so that equipment and receiver are on  
different branch circuits.  
If necessary, the user should consult the dealer or an experienced radio/television  
technician for additional suggestions. The user may find the following booklet  
prepared by the Federal Communications Commission helpful:  
How to Identify and Resolve Radio-TV Interference Problems  
This booklet is available from the U.S. Government Printing Office, Washington,  
DC 20402, Stock No. 004-000-00345-4.  
In order to meet FCC emissions limits, this equipment must be used only with  
cables which comply with IEEE 802.3.  
7
 
LEGAL NOTICES  
© 3Com Technologies, 2001. All rights reserved. No part of this documentation  
may be reproduced in any form or by any means or used to make any derivative  
work (such as translation, transformation, or adaptation) without permission from  
3Com Technologies.  
Technical Data and Computer Software clause at 48 C.F.R. 52.227-7013. 3Com  
Centre, Boundary Way, Maylands Park South, Hemel Hempstead, Herts, HP2 7YU,  
U.K.  
For civilian agencies:  
3Com Technologies reserves the right to revise this documentation and to make  
changes in content from time to time without obligation on the part of 3Com  
Technologies to provide notification of such revision or change.  
Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set  
forth in subparagraph (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 Corporations standard commercial agreement for the software. Unpublished  
rights reserved under the copyright laws of the United States.  
3Com Technologies 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.  
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.  
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:  
Unless otherwise indicated, 3Com registered trademarks are registered in the United  
States and may or may not be registered in other countries.  
For units of the Department of Defense:  
3Com and SuperStack are registered trademarks of 3Com Corporation.  
Restricted Rights Legend: Use, duplication or disclosure by the Government is  
subject to restrictions as set forth in subparagraph (c) (1) (ii) for restricted Rights in  
Other brand and product names may be registered trademarks or trademarks of  
their respective holders.  
ENVIRONMENTAL STATEMENTS  
General Environmental Statement  
It is the policy of 3Com Corporation to be environmentally friendly in all  
operations. To uphold our policy, we are committed to:  
End Of Life Statement  
3Com processes allow for the recovery, reclamation and safe  
disposal of all end-of-life electronic components.  
!
Establishing environmental performance standards that comply with  
national legislation and regulations  
Regulated Materials Statement  
3Com products do not contain any hazardous or  
ozone-depleting material.  
!
!
!
Conserving energy, materials and natural resources in all operations  
Reducing the waste generated by all operations  
Environmental Statement about the  
Documentation  
Ensuring that all waste conforms to recognized environmental  
standards  
The documentation for this product is printed on paper that  
comes from sustainable, managed forests; it is fully biodegrad-  
able and recyclable, and is completely chlorine-free. The var-  
nish is environmentally-friendly, and the inks are  
!
!
Maximizing the recyclable and reusable content of all products  
Ensuring that all products can be recycled, reused and disposed of  
safely  
vegetable-based with a low heavy-metal content.  
!
!
Ensuring that all products are labelled according to recognized  
environmental standards  
Environmental Statement about the Product  
Packaging  
Improving our environmental record on a continual basis  
The packaging for this product is fully recyclable. It has a recy-  
cled (post consumer) waste content of at least 40% by weight,  
and no heavy-metal content.  
The SuperStack 3 Baseline Dual Speed Hub is part of the extensive SuperStack 3 range of 3Com products. This range includes hubs, switches,  
power systems and other networking equipment, and is continually being developed. Contact your supplier for the latest product information  
and to order these products.  
Product Registration  
You can now register your SuperStack 3 Hub on the 3Com web site to receive up-to-date information on your product:  
Year 2000 Compliance  
For information on Year 2000 compliance and 3Com products, visit the 3Com Year 2000 Web page:  
Feedback  
Your suggestions are very important to us. They will help make our documentation more useful to you. Please e-mail comments about this docu-  
ment to 3Com at:  
Please include the following information when commenting: the document title, part number (shown at the bottom of page 8), and  
page number, if appropriate.  
Part Number: DUA1659-2AAA04  
Published: January 2001  
8
 

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