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3Com OfficeConnect 3C1670500C User Manual

Made by: 3Com
Type: User Guide
Category: Switch
Pages: 18
Size: 2.38 MB


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3Com Corporation, Corporate Headquarters, 350 Campus Drive,
Marlborough, MA 01752-3064


10016681 REV BA   June 2008



Gigabit Switch 5 


Gigabit Switch 8 


User Guide

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Gigabit Switch 5
4.1W, 14 BTU/hr
power requirement

Gigabit Switch 8
4.8W, 16.4 BTU/hr
power requirement


Switch 5:

85 mm (3.35 in)

Switch 8:

85 mm (3.35 in)

0 to 40ºC
(32 to 105ºF)

0 to 95%

Switch 5:
112 mm (4.4 in)
Switch 8:
146 mm (5.75 in)



= 10


, Ye


 = 1





= A



About This Guide

This guide will use the term Switch when referring to the
OfficeConnect Gigabit Switch.


Dimensions and Operating Conditions


ISO 8802/3, IEEE 802.3, 802.3u


UL 60950-1, EN 60950-1, CSA 22.2
#60950-1, IEC60950-1


EN 55022 Class B, EN 55024, 
FCC Part 15 Class B*
ICES-003 Class B


EN 60068 (IEC 68)

Gigabit Switch 5 Only: Category 5 screened cables must be used to ensure
compliance with the Class B requirements of the above standards. The use of
unscreened cables complies with the Class A requirements.
* Refer to Regulatory Notices in the Support and Safety Information Section.


About This Guide:

Thank you for purchasing the 3Com




Gigabit Switch. This high quality, Gigabit Ethernet Switch is
an easy, efficient way of creating a network or expanding
an existing network. The Switch’s Gigabit ports provide sup-
port for bandwidth intensive applications, and allow high-
speed connections to servers, and to the rest of the network. An
example configuration is shown in Figure 1.

This switch is one of the most compact designs in the industry
making it ideal for desktop use, and in keeping with the
3Com GreenConnect* tradition, this switch incorporates the
latest 65nm technology. This allows for lower power con-
sumption and decrease in carbon footprint. It can be used
with other units in the OfficeConnect family, which include
Cable/DSL gateways, wireless devices, Fast Ethernet and
Gigabit Ethernet switches. The OfficeConnect family is a fully
integrated system, enabling you to share computer resources,
and take advantage of new technologies as your network

Your Package Contains:

• OfficeConnect Switch
• Power adapter for use with the Switch
• Four rubber feet
• This User Guide
• Warranty flyer


*refer to GreenConnect Section of this User Guide for more information

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Fast Ethernet Switch 8

Gigabit Switch






, Fl








en =

 1000M, Y


 = 1



, Fl


 = A





Your OfficeConnect Gigabit Switch employs a number of 
initiatives to ensure your product uses the least amount of
power possible:

1. High Efficiency Power Adapter

The Power Adapter is a model especially designed to meet
the Energy Star

requirements for operating efficiency and

also very low standby power when not connected to the
switch. These two features ensures your power adapter now
uses substantially less power than a conventional linear

2. Energy Saving Modes

Your OfficeConnect Gigabit Switch employs the latest tech-
nology to minimise the amount of power it consumes. It uses
the latest 65nm silicon to deliver the lowest operating power,
and in addition uses features which under normal operating
conditions ensures your switch uses the least amount of

When a port on the switch is not connected to a cable, or the
link partner is turned off or removed, the switch reduces the
power on that port until it is connected again. 

You can be confident that your Switch will be taking the least
amount of power but still providing the performance that you
have come to expect from OfficeConnect.



Figure 1
Network showing sample configuration with Gigabit Switch.

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Green = 1000M, Yellow = 10/100M, Flash = Activity 

OfficeConnect Gigabit Switch - Rear

3 Power Adapter Socket

Only use the power adapter that is supplied with the

4 10BASE-T/100BASE-TX/1000BASE-T Ports

Use suitable TP cable with RJ-45 connectors. You can
connect your Switch to a workstation, or any other piece
of equipment that has 10BASE-T/100BASE-TX/
1000BASE-T connectivity.

Each port is capable of autosensing for 10 Mbps, 
100 Mbps or 1000 Mbps operation.

All ports have an automatic MDI/MDIX feature, which
means either straight-through or crossover cable can be
used to connect to any port.


OfficeConnect Gigabit Switch - Front

1 Power LED (Illuminated Logo) 

Indicates that the Switch is receiving power. If the LED is off
there may be a problem with the power adapter, power
adapter cable or the Switch's internal power supply. Refer
to Problem Solving.

2 Five/Eight/ Port Status LEDs

Green (1000 Mbps link) / Yellow (10 or 100 Mbps link)

If the LED is on, the link between the port and the next piece
of equipment is OK. If the LED is flashing, the link is OK and
data is being transmitted or received. If the LED is off, noth-
ing is connected or the connected device is turned off, or
there is a problem with the connection (refer to the Problem
Solving section).







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Safety Information

WARNING: Please read the ‘Important Safety
Information’ section in the Support and Safety
Information sheet before you start. 

VORSICHT: Bitte lesen Sie den Abschnitt ‘Wichtige
Sicherheitsinformationen’ sorgfältig durch, bevor Sie das
Gerät einschalten.

AVERTISSEMENT: Veuillez lire attentivement la 
section "Consignes importantes de sécurité" avant de
mettre en route.

When positioning your Switch, ensure:

• It is out of direct sunlight and away from sources of heat.
• Cabling is away from power lines, fluorescent lighting fix-

tures, and sources of electrical noise such as radios, trans-
mitters and broadband amplifiers.

• 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 you provide
a minimum of 25 mm (1 in.) clearance.

Using the Rubber Feet

Use the four self-adhesive rubber feet to prevent your Switch
from moving around on your desk, or when stacking with flat
top OfficeConnect units. Only stick the feet to the marked
areas at each corner on the underside of your Switch.

WARNING: RJ-45 ports.

These are shielded RJ-45 data sockets. They cannot be used
as standard traditional telephone sockets, or to connect the
unit to a traditional PBX or public telephone network. Only
connect RJ-45 data connectors, network telephony systems,
or network telephones to these sockets.

Either shielded or unshielded data cables with shielded or
unshielded jacks can be connected to these data sockets.

VORSICHT: RJ-45-Portes.

Diese Portes sind geschützte Datensteckdosen. Sie dürfen
weder wie normale traditionelle Telefonsteckdosen noch für
die Verbindung der Einheit mit einem traditionellenm 
privatenm oder öffentlichenm Telefonnetzwerk gebraucht
werden. Nur RJ-45- Datenansclußhlüsse,
Telefonnetzsysteme oder Netztelefone an diese Steckdosen

Entweder geschützte oder ungeschützte Buchsen dürfen an
diese Datensteckdosen angeschlossen werden. 

AVERTISSEMENT : Prises RJ-45 blindées.

Ces prises ne peuvent servir comme prises téléphone 
standard et ne permettent pas la connexion de l'appareil à
un système PBX ni à un réseau téléphonique public. N'y
branchez que des prises RJ-45 mâles adaptées, ou des 
systèmes de réseaux téléphoniques. Il est possible d'y
brancher des câbles blindés ou non comportant des prises
de type Jack (blindées ou non).



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Wall Mounting

There are two slots on the underside of the Switch that can
be used for wall mounting. The Switch must be mounted
with the LEDs facing upwards.

When wall mounting the unit, ensure it is within reach
of the power outlet

When wall mounting the unit, ensure that the rubber
feet are not fixed

Mounting Instructions for Cement Walls

Make two holes 67mm apart for 5 port, and 100mm apart

for 8 port and insert two nylon or similar screw anchors
that are suitable for the wall construction.

Fix two suitable screws into the anchors, leaving their

heads 3 mm (0.12 in.) clear of the wall surface. The screws
should be at least 30 mm (1.2 in.) long, 

Remove any connections in the Switch and locate it over

the screw heads. When in line, gently push the Switch on
to the wall and move it downwards to secure.

Mounting Instructions for Wood Walls

Make two holes 67mm apart for 5 port, and 100mm apart

for 8 port. 

Fix two suitable screws directly into the wall, leaving their

heads 3 mm (0.12 in.) clear of the wall surface. The screws
should be at least 20 mm (0.75 in.) long, 

Remove any connections in the Switch and locate it over

the screw heads. When in line, gently push the Switch on
to the wall and move it downwards to secure.

CAUTION: When making connections, be careful not
to push the Switch up and off the wall.





ll mounting template

Gigabit Switch 5

67mm apart

Gigabit Switch 8

100mm apart

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n =



, Ye

llow = 1





= A




Twisted Pair (TP) Cables

Cables can be shielded (screened) or unshielded. Cables must
be Category 5 or above. 3Com recommends Category 5E
cable for Gigabit connections. The maximum length you can
use is 100 m (328 ft).

Twisted Pair (TP) cable is very easy to use. To connect a TP
cable, simply slot the connector into the relevant RJ-45 Port.
When a connector is fully in, its latch locks into place. To dis-
connect the cable, push the connector’s latch in and remove it.

When one end of a TP cable is connected to the Switch and
the other end is connected to the network interface card of a
workstation or other device, the Switch will automatically
detect whether a straight-through or crossover cable is being
used and will compensate if required. The units will then
autonegotiate to determine the fastest possible link speed
between them. This may take a few seconds and the out-
come will be reflected in the LEDs on the front of the Switch.

If the equipment connected to the Switch does not
support autonegotiation or it has been disabled, it
must be configured to operate in half duplex mode.

Expanding Your Network

You can increase the number of workstations and other
devices that can connect to your network by adding other
OfficeConnect gateways and switches. You can connect a
10BASE-T, 100BASE-TX or 1000BASE-T OfficeConnect unit to
each port of the Switch.




Unit Connections

To connect other OfficeConnect units (such as gateways or
switches) to your Switch you need:

• One suitable Twisted Pair (TP) cable for each unit
3Com recommends Category 5E cable for Gigabit connections.

Workstation Connections

To connect workstations or other equipment (such as servers)
directly to your Switch, you need:

One adapter card for each workstation to be connected to

a port on the Switch. The adapter card must be capable of
communicating at the required connection speed. For
example, if you want to use a Gigabit connection, you
must install a 1000BASE-T adapter card. 

An operating system (for example Windows/Mac/Linux)

with network support configured, running on your work-

One suitable Twisted Pair cable for each workstation.

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Traffic Prioritization

The Switch has a built in feature to aid network performance
at times of excessive load. It is called Priority Queuing. When a
packet is received, the Switch will examine it to see if it has
been priority encoded. If it has, the Switch will then read the
priority level and determine whether it should be directed
through the normal or high priority channel. This feature can
be useful during excessive loads, for example, when one type
of traffic may require priority over another.

Automatic Loop Detect

This Switch has automatic loop detection technology which will
prevent unwanted recirculation of packets which could poten-
tially clog your network.

Connecting 10BASE-T/100BASE-TX/1000BASE-T

The ports can each be connected to a 10BASE-T/100BASE-TX/
1000BASE-T network. If you have various connection speeds
in your network, you can join them together using the Switch
allowing all your workstations to communicate. For example,
by connecting one of the ports to a server, all the worksta-
tions connected to the server can communicate with devices
connected to the Switch, significantly increasing the size of
your network.

Alternatively, if for example you use a 10BASE-T/100BASE-TX
network and want to improve network performance by intro-
ducing 1000BASE-T technology, the Switch protects the
investment in your existing workstations because it maintains
10BASE-T/100BASE-TX connections to them.

The Switch has automatic MDI/MDIX functionality. Simply
plug in the cable, and the Switch will automatically detect
which wiring practice has been followed, and will compen-
sate accordingly.

Checking Unit Connections

When you have connected all your units, power on the units
and the Switch. The Port Status LEDs for the ports you have
used should be lit. If they are not, check your connections.



When a network of repeater hubs is in operation, any infor-
mation that is sent by the workstation is passed around the
whole network (regardless of the destination of the informa-
tion). This can result in a lot of unnecessary traffic that can
slow the network down. The Switch solves this problem
because it "listens" to the network and automatically learns
what workstations can be reached through its ports. It can
then selectively pass on any information by transmitting the
traffic from the relevant port only. This operation is called

The Switch effectively divides up your network, localizing the
network traffic and passing on traffic as necessary. If you have
any high performance workstations that require a lot of band-
width, connect them directly to the Switch.



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The Switch has been designed to aid you when detecting and
solving possible problems with your network. These problems
are rarely serious; the cause is usually a disconnected or dam-
aged cable, or incorrect configuration. If this section does not
solve your problem, contact your supplier for information on
what to do next.

Perform these actions first:

• Ensure all network equipment is powered on.
• Power each piece of network equipment off, wait about

five seconds and then power each one on.

CAUTION: Do not power the Switch off and then
immediately on. Wait about five seconds between
power cycles. 

Check the following symptoms and solutions:

Power Status LED (Illuminated Logo) not lit.

The power adapter or power adapter connection is likely to
be faulty. Check your power adapter connection. If there is
still no power, contact 3Com Technical Support and ask for a
replacement power adapter. Please quote the power adapter
part number, shown on the OfficeConnect power adapter
you are currently using or refer to the table on next page. 



Alternatively, quote the part number for your region:

3C number




United States



United Kingdom



Mainland Europe









South Korea



Only use the power adapter supplied with the Switch
or a replacement OfficeConnect power adapter. Do
not use any other power adapter.

Port Status LED not lit for a port that has a TP cable
After connection, it may take several seconds for
the Port Status LEDs to illuminate. The Port Status LED should
turn Green or Yellow for each port that is connected,
depending on connection speed. Please refer to ‘About Your
Switch’ for a full description of the LEDs.

If the Port Status LED is not lit after several seconds, ensure
that the connected device is powered on, that the TP cable is
not damaged and that it is correctly inserted at both ends.

You may find that a TP cable works when connected to the
Switch, but that it does not if disconnected from the Switch
and connected to another device. This may be because the
other device does not have the automatic MDI/MDIX feature.

The Port Status LED is lit but the network performance of
the switch is poor.  
The switch supports full-duplex autonego-
tiation. If the connected device does not support autonegotia-
tion, ensure it is configured for half duplex operation only. 

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Important Safety Information

WARNING: Warnings contain directions you must follow for your

personal safety. Follow all directions carefully.
You must read the following safety information before carrying out any
installation or removal of the unit, or any maintenance procedures.

WARNING: Exceptional care must be taken during installation and

removal of the unit.

WARNING: To ensure compliance with international safety standards

this product must only be used with a power supply that is approved in
the country of use. 
The power supply output must be +12VDC, 1A minimum and the polarity
of the power supply output connector must comply with the marking on
the unit.

WARNING: Disconnect the power adapter before moving the unit.

WARNING: This unit operates under SELV (Safety Extra Low Voltage)

conditions according to IEC 60950-1. The conditions are only maintained
if the equipment to which it is connected also operates under SELV 

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They

cannot be used as standard traditional telephone sockets, or to connect
the unit to a traditional PBX or public telephone network. Only connect
RJ-45 data connectors, network telephony systems, or network telephones
to these sockets.
Either shielded or unshielded data cables with shielded or unshielded
jacks can be connected to these data sockets.



and Safety

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Wichtige Sicherheitsinformationen

Warnung: Warnhinweise enthalten Anweisungen, die Ihrer 

persönlichen Sicherheit dienen. Befolgen Sie all diese Anweisungen mit
größter Sorgfalt.

Lesen Sie unbedingt die folgenden Sicherheitsinformationen, bevor Sie
eine Installation oder Entfernung des Gerätes vornehmen bzw.
Wartungen/Instandhaltungen durchführen.

Warnung: Bei der Installation und Entfernung des Gerätes ist mit

äußerster Sorgfalt vorzugehen.

Warnung: Um die Übereinstimmung mit den internationalen

Sicherheitsstandards zu gewährleisten, darf dieses Produkt nur mit einer
Stromversorgung betrieben werden, die den Bestimmungen des 
jeweiligen Landes entspricht.
Die Netzsteckdose muss +12VDC, 1A minimal haben und die Polarität
des Netzanschlusses muss der Kennzeichnung auf dem Gerät

Warnung: Nehmen Sie vor dem Transport des Gerätes den

Netzadapter ab.

Warnung: Dieses Gerät arbeitet gemäß IEC 60950-1 mit

Schutzkleinspannung (SELV = Safety Extra Low Voltage). Dieser Schutz
bleibt nur erhalten, wenn die angeschlossene Anlage ebenfalls über SELV

Warnung: RJ-45 Anschluss. Dies sind abgeschirmte RJ-45-

Datenbuchsen. Sie können nicht als herkömmliche
Standardtelefonbuchsen verwendet werden und verbinden das Gerät
nicht mit einer herkömmlichen Telefonanlage oder einem öffentlichen
Telefonnetz. Schließen Sie an diese Buchsen nur RJ-45-Datenanschlüsse,
Netzwerktelefonieanlagen oder Netzwerktelefone an.
An diese Datenbuchsen können abgeschirmte oder nicht abgeschirmte
Stecker angeschlossen werden.

Consignes de sécurité importantes

Avertissement: Ces avertissements sont à respecter pour votre sécurité.

Lisez-les attentivement.
Vous devez impérativement lire les consignes de sécurité suivantes avant
de procéder à l’installation ou à la désinstallation du matériel, ou à toute
activité d’entretien.

Avertissement: L’installation et la désinstallation du matériel nécessite

une vigilance exceptionnelle.

Avertissement: Pour être conforme aux normes de sécurité 

internationales, ce produit doit être utilisé exclusivement avec une 
alimentation aux normes du pays d’utilisation.
La sortie de l’alimentation doit être de 12 V continus, 1A minimum, et les
polarités du connecteur de sortie doivent coïncider avec les indications
figurant sur l’appareil.

Avertissement: Coupez systématiquement l’adaptateur secteur

avant de déplacer l’appareil.

Avertissement: Cet appareil fonctionne à très basse tension de

sécurité (SELV, Safety Extra Low Voltage) conformément à la norme IEC
60950-1. Pour ce faire, le matériel auquel il est connecté doit également
fonctionner sous SELV.

Avertissement: Ports RJ 45. Il s’agit de connecteurs de 

communication de données blindés RJ 45. Il n’est pas possible de les
utiliser comme prises téléphoniques classiques ni de connecter l’appareil à
un standard téléphonique classique ou à un réseau téléphonique public.
Seuls des connecteurs de réseau de données RJ 45, des systèmes de 
téléphonie en réseau ou des téléphones réseau peuvent y être branchés.
Vous pouvez y brancher des câbles pour réseau de données blindés ou
non pourvus de prises jack blindées ou non aux extrémités.



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Información de seguridad importante

Advertencia: Las advertencias contienen instrucciones que debe

seguir para su seguridad personal. Siga todas las instrucciones atentamente. 
Debe leer la siguiente información de seguridad antes de llevar a cabo la
instalación o extracción de la unidad, o cualquier procedimiento de 

Advertencia: Se debe extremar el cuidado durante la instalación y

extracción de la unidad.

Advertencia: Para asegurar la conformidad con los estándares de

seguridad internacionales, este producto sólo se puede usar con una
fuente de alimentación aprobada en el país de uso.
La salida de la fuente de alimentación debe ser de +12V CC, de 1A 
mínimo y la polaridad del conector de salida de alimentación debe
cumplir con la marca en la unidad.

Advertencia: Desconecte el adaptador de alimentación antes de

desplazar la unidad.

Advertencia: Esta unidad opera bajo condiciones SELV (muy bajo

voltaje de seguridad) de acuerdo con la norma IEC 60950-1. Las 
condiciones sólo se mantienen si el equipo al que está conectado 
también opera bajo condiciones SELV.

Advertencia: Puertos RJ-45 Son enchufes de datos RJ-45 blindados.

No se pueden usar en los tradicionales enchufes telefónicos estándar, o
para conectar la unidad a una red PBX tradicional o red telefónica 
pública. Conecte únicamente a estos enchufes los conectores de datos
RJ-45, sistemas de telefonías de red o teléfonos de red.
A estos enchufes de datos se pueden conectar cables blindados o no
blindados con tomas hembra blindadas o no blindadas.

Importanti informazioni di sicurezza 

Avvertenza: Queste avvertenze precisano le direttive da seguire per

la propria sicurezza personale. Conformarsi con la massima attenzione a
quanto precisato. 
Leggere con attenzione le informazioni relative alla sicurezza prima di
procedere all’installazione o alla rimozione dell’unità o a qualsiasi 
intervento di manutenzione.

Avvertenza: E’ necessario prestare la massima attenzione durante

l’installazione e la rimozione dell’unità.

Avvertenza: Per garantire la piena conformità con gli standard di

sicurezza internazionali, il prodotto deve essere utilizzato con 
un’alimentazione approvata nello specifico paese di utilizzo.
L’uscita dell’alimentazione deve essere +12V DC, 1A minimo e la polarità
del connettore dell’uscita dell’alimentazione dovrà conformarsi con la
marcatura riportata sull’unità.

Avvertenza: Scollegare l’adattatore di alimentazione prima di

spostare l’unità.

Avvertenza: Quest’unità funziona in condizioni SELV (Safety Extra

Low Voltage)  conformemente a IEC 60950-1. Tali condizioni potranno
essere mantenute solo se l’apparecchiatura a cui è collega funziona 
similmente in condizioni SELV.

Avvertenza: Porte RJ-45. Si tratta di prese dati schermate RJ-45.

Non potranno essere utilizzate come prese telefoniche tradizionali o per
collegare l’unità ad una normale rete PBS o telefonica pubblica. Collegare
a queste prese solo connettori RJ-45, sistemi di telefonia in rete o telefoni
in rete.
A queste prese dati potranno essere collegati cavi dati schermati o meno
con jack schermati o meno.



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For further details please refer to



FCC Statement

This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reason-
able protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accor-
dance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or televi-
sion, which can be determined by turning the equipment off
and on, the user is encouraged to to try to correct the inter-
ference by one or more of the following measures:

• Reorient or relocate the receiving antenna
• Increase the separation distance between the equipment

and receiver

• Connect the equipment to an outlet on a circuit different

from that to which the receiver is connected

• Consult the dealer or an experienced radio / TV technician

for help



Istotne Bezpieczeń stwo Informacja

Warning: Ostrzeż enia zawierają wskazówki, których należ y

przestrzegać w celu zagwarantowania bezpieczeń stwa osobistego. Do
tych zaleceń  należ y stosować się dokł adnie. 

Przed przystąpieniem do instalacji, usuwania urządzenia lub jakichkolwiek
czynności konserwacyjnych należ y zapoznać się z instrukcjami 
bezpieczeń stwa.

Warning: Podczas montaż u lub demontaż u urządzenia należ y 

pracować z wyjątkową uwagą.

Warning: Aby zapewnić zgodność z międzynarodowymi standardami

bezpieczeń stwa, produkt należ y wył ącznie uż ywać w poł ączeniu z 
zasilaczem zatwierdzonym w danym kraju.

Gniazdo zasilania musi mieć parametry +12 VDC, 1A minimum, a
biegunowość zł ącza wyjściowego musi być zgodna z oznaczeniami
na urządzeniu.

Warning: Przed przeniesieniem urządzenia należ y odł ączyć zasi-


Warning: Urządzenie dział a w warunkach SELV (obwód bez-

piecznego niskiego napięcia) zgodnie z normą IEC 60950-1. Warunki te
są jednak zagwarantowane wył ącznie wtedy, gdy sprzęt, do którego
podł ączone jest urządzenie, również  pracuje w obwodzie SELV.

Warning: Porty RJ-45. Są to ekranowane gniazda RJ-45 do

danych. Nie są przeznaczone do uż ycia jako standardowe gniazda 
telefoniczne lub do podł ączenia urządzenia do PBX lub publicznej
sieci telefonicznej. Do tych gniazd wolno podł ączać wył ącznie wtyki
RJ-45 danych, systemów telefonii sieciowej lub telefonów sieciowych.

Do tych gniazd moż na podł ączać kable danych ekranowane lub 
nieekranowane z ekranowanymi lub nieekranowanymi wtykami.

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CSA Statement

This Class B digital apparatus meets all requirements of the
CanadianInterference-Causing Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exi-
gences du Règlementsur le matériel brouilleur du Canada.

CE Statement and Manufacturer's Declaration of conformity

A copy of the signed Declaration of Conformity can be down-
loaded from the Product Support web page at

Also available at

VCCI Statement

Manufacturers Declaration of Conformity

3Com Corporation, 350 Campus Drive, Marlborough, 
MA 01752-3064, USA

Declares that the following products:

Date: June 2008

Brand Name: 3Com Corporation

Model Nos.: 3C1670500C, 3C1670800C

Equip Type: Gigabit Switch 5 / Gigabit Switch 8

Complies with Part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation. Gigabit Switch 5 Only: Category 5
screened cables must be used to ensure compliance with the
Class B requirements of the above standards. The use of
unscreened cables complies with the Class A requirements.



Tested to Comply 
With FCC Standards 
For Home or Office

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Experienced engineers are available to manage your installa-
tion with minimal disruption to your network. Expert assess-
ment and implementation services are offered to fill resource
gaps and ensure the success of your networking projects. For
more information on 3Com Extended Warranty and
Professional Services, see: http://www.3com.com/

Contact your authorized 3Com reseller or 3Com for addition-
al product and support information. See the table of access
numbers later in this appendix.

Contact Us

3Com offers telephone, internet, and e-mail access to techni-
cal support and repair services. To access these services for
your region, use the appropriate telephone number, URL, or
e-mail address from the table in the next section. 

Telephone Technical Support and Repair

To obtain telephone support as part of your warranty and
other service benefits, you must first register your product at:

When you contact 3Com for assistance, please have the fol-
lowing information ready:

• Product model name, part number, and serial number
• A list of system hardware and software, including revision


• Diagnostic error messages
• Details about recent configuration changes, if applicable
To send a product directly to 3Com for repair, you must first
obtain a return materials authorization number (RMA).


3Com offers product registration, case management, and
repair services through eSupport.3com. You must have a
user name and password to access these services, which are
described in this appendix.

Register Your Product to Gain Service Benefits

To take advantage of warranty and other service benefits, you
must first register your product at:
http://eSupport.3com.com/. 3Com eSupport services are
based on accounts that are created or that you are authorized
to access.

Solve Problems Online

3Com offers the following support tool:

• 3Com Knowledgebase — Helps you to troubleshoot 3Com

products. This query-based interactive tool is located at:
http://knowledgebase.3com.com. It contains thousands
of technical solutions written by 3Com support engineers. 

Purchase Extended Warranty and Professional

To enhance response times or extend your warranty benefits,
you can purchase value-added services such as 24x7 tele-
phone technical support, software upgrades, onsite assis-
tance, or advanced hardware replacement.



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Sri Lanka Call the U.S. direct by dialing 02 430 430, then 
dialing 800 763 6780 

Vietnam Call the U.S. direct by dialing 1 201 0288, then 
dialing 800 763 6780

You can also obtain non-urgent support in this region at this
email address apr_technical_support@3com.com

Or request a return material authorization number (RMA) by
FAX using this number: +61 2 9937 5048, or send an email
at this email address: ap_rma_request@3com.com

Country Telephone 


Europe, Middle East, and Africa — Telephone
Technical Support and Repair

From anywhere in these regions not listed below, 
call: +44 1442 435529

From the following countries, call the appropriate number:


0800 297 468 


0800 71429 


800 17309


0800 113153


0800 917959 


0800 182 1502


06800 12813 


1 800 553 117


180 945 3794


800 879489


800 23625 


0800 0227788 


800 11376 

Products sent to 3Com without authorization numbers clearly
marked on the outside of the package will be returned to the
sender unopened, at the sender’s expense. If your product is
registered and under warranty, you can obtain an RMA num-
ber online at http://eSupport.3com.com/. First-time users
must apply for a user name and password.

Telephone numbers are correct at the time of publication.
Find a current directory of 3Com resources by region at:

Country Telephone 


Asia, Pacific Rim — Telephone Technical Support and


1800 075 316 

Hong Kong

2907 0456 


000 800 440 1193 


001 803 852 9825


03 3507 5984 


1800 812 612 

New Zealand

0800 450 454


1800 144 10220 or 029003078 

P.R. of China

800 810 0504 


800 616 1463 

South Korea

080 698 0880 


00801 444 318 


001 800 441 2152

Pakistan Call the U.S. direct by dialing 00 800 01001, then
dialing 800 763 6780 



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Country Telephone 



AT&T +800 988 2112

Dominican Republic

AT&T +800 998 2112

El Salvador

AT&T +800 988 2112


AT&T +800 988 2112

French Guyana

AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 998 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 998 2112


AT&T +800 988 2112


1800 849 2273

Mexico Local



AT&T +800 998 2112


AT&T +800 998 2112


AT&T +800 998 2112


AT&T +800 998 2112


AT&T +800 998 2112

Puerto Rico

AT&T +800 998 2112

Rest of Latin America

508 323 6234

St. Kitts Nevis

AT&T +800 998 2112

St. Lucia

AT&T +800 998 2112

St. Vincent

AT&T +800 998 2112


AT&T +800 998 2112

Trinidad and Tobago

AT&T +800 998 2112

Turks and Caicos

AT&T +800 998 2112

Uruguay - Montevideo

AT&T +800 998 2112


AT&T +800 998 2112

Virgin Islands

AT&T +800 998 2112

Country Telephone 



00800 4411 357


800 831416 

South Africa

0800 995 014 


900 938 919 


020 795 482


0800 553 072 


0800 096 3266

You can also obtain support in this region using this URL:

Country Telephone 


Latin America — Telephone Technical Support and Repair


AT&T +800 988 2112

Antigua Barbuda

AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


AT&T +800 988 2112


0800-133266 (0800-13-3COM)

Brasil Local

+5511 5643 2700

British Virgin Islands

AT&T +800 988 2112

Cayman Islands

AT&T +800 988 2112


AT&T +800 998 2112


AT&T +800 998 2112

Columbia Local

+571 592 5000

Costa Rica

AT&T +800 998 2112



3C1670500C_3C1670800C_booklet_rev2_final.qxp:3C1670500C  3/6/08  10:03  Page 32


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3Com Corporation, Corporate Headquarters, 350 Campus Drive, Marlborough, MA 01752-3064

Copyright © 2008 3Com Corporation. All rights reserved. 

No part of any documentation supplied with this product may be reproduced in any form or by
any means or used to make any derivative work (such as translation, transformation, or adapta-
tion) without written permission from 3Com Corporation.

3Com Technologies reserves the right to revise any documentation supplied with this product
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.

3Com Technologies provides any documentation supplied with this product without warranty,
term, or condition of any kind, either implied or expressed, including, but not limited to, the
implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a
particular purpose. 3Com may make improvements or changes in the product(s) and/or the
program(s) described in any documentation supplied with this product at any time.

If there is any software on removable media described in any documentation supplied with this
product, it is furnished under a license agreement included with the product as a separate doc-
ument, in the hard copy documentation, or on the removable media in a directory file named
LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a
copy will be provided to you.

If you are a United States government agency, then any documentation supplied with this
product and the software described therein are provided to you subject to the following: 

All technical data and computer software are commercial in nature and developed solely at pri-
vate expense. Software is delivered as "Commercial Computer Software" as defined in DFARS
252.227-7014 (June 1995) or as a "commercial item" as defined in FAR 2.101(a) and as such is
provided with only such rights as are provided in 3Com’s standard commercial license for the
Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015
(Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or
deface any portion of any legend provided on any licensed program or documentation supplied
to you in connection with this product.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and
may or may not be registered in other countries.

3Com, the 3Com logo and OfficeConnect are registered trademarks of 3Com Corporation.

All other company and product names may be trademarks of the respective companies with
which they are associated.

Please e-mail any comments about this document to 3Com at:
pddtechpubs_comments@3Com.com. Please include the document title, part number and if
appropriate, the page number.

You can also obtain support in this region in the following

Spanish speakers, enter the URL:

Portuguese speakers, enter the URL:

English speakers in Latin America should send e-mail to:

Country Telephone 


US and Canada — Telephone Technical Support and Repair

All locations:    All 3Com products:    1 800 876 3266




The above table provides information required under the following Chinese legislation:
Management methods for Controlling Pollution by Electronic Information Products (No. 39)
(also known as China RoHS)

3C1670500C_3C1670800C_booklet_rev2_final.qxp:3C1670500C  3/6/08  10:03  Page 34