3Com 3C16753, 3C16754 User Manual

OfficeConnect

®

Dual Speed Hub 5 (3C16755)
Dual Speed Hub 8 (3C16753)
Dual Speed Hub 16 (3C16754)

User Guide

OfficeConnect

®

Dual Speed Hub 5 (3C16755)
Dual Speed Hub 8 (3C16753)
Dual Speed Hub 16 (3C16754)

User Guide

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145

Copyright © 2001, 3Com Technologies. All rights reserved.
No part of this documentation may be reproduced in any form or by any means or used to

make any derivative work (such as translation, transformation, or adaptation) without
written permission from 3Com Technologies.

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.

3Com Technologies provides this documentation 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 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 or
!LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be
provided to you.

UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software
described herein are provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at
private 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 contained in, or delivered to you in conjunction with,
this User Guide.

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

3Com and OfficeConnect are registered trademarks of 3Com Corporation. The 3Com logo
is a trademark of 3Com Corporation.

Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.
Netscape Navigator is a registered trademark of Netscape Communications. Novell and
NetWare are registered trademarks of Novell, Inc. UNIX is a registered trademark in the
United States and other countries, licensed exclusively through X/Open Company, Ltd.

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

Environmental Statements

It is the policy of 3Com Corporation to be environmentally- friendly in all operations. To
uphold our policy, we are committed to:

■

Establishing environmental performance standards that comply with national
legislation and regulations.

■

Conserving energy, materials and natural resources in all operations.

■

Reducing the waste generated by all operations. Ensuring that all waste
conforms to recognized environmental standards. Maximizing the recyclable and
reusable content of all products.

■

Ensuring that all products can be recycled, reused and disposed of safely.

■

Ensuring that all products are labelled according to recognized environmental
standards.

■

Improving our environmental record on a continual basis.

End of Life Statement

3Com processes allow for the recovery, reclamation and safe disposal of all end- of- life
electronic components.

Regulated Materials Statement

3Com products do not contain any hazardous or ozone- depleting material.

Environmental Statement about the Documentation

The documentation for this product is printed on paper that comes from sustainable,
managed forests; it is fully biodegradable and recyclable, and is completely chlorine-free.

The varnish is environmentally-friendly, and the inks are vegetable-based with a low
heavy-metal content.

3

Introduction 5

Creating your Network 6

Dual Speed Hub 8—Front 6
Dual Speed Hub 8—Rear 7
Dual Speed Hub 16—Front 8
Dual Speed Hub 16—Rear 9

Before You Start 10

Workstation Connections 10
Twisted Pair (TP) Cables 10
Hub Connections 10

Stacking the Units Together 11

The Rubber Feet 11

The Stacking Clip 11
Positioning Your Hub 12
Securing Your Hub 12
Connecting Workstations and Other Equipment to Your Hub 13
Connecting Another OfficeConnect Hub 13

Fast Ethernet (100Mbps) Configuration Rules 13

Ethernet (10Mbps) Configuration Rules 14

Making the Connection to Another Hub 15

Checking Hub Connections 15

Spot Checks 15

Problem Solving 16

Networking Terminology 18

Dimensions and Standards 19

Dimensions and Operating Conditions 19
Standards 19

Environmental Statements 20

End Of Life Statement 20
Regulated Materials Statement 20
Environmental Statement about the Documentation 20
Environmental Statement about the Product Packaging 20

Important Safety Information 21

Wichtige Sicherheitshinweise 22

Consignes importantes de sécurité 23

Technical Support 24

Online Technical Services 24
World Wide Web Site 24
3Com Knowledgebase Web Services 24
Support from Your Network Supplier 25
Support from 3Com 25
Returning Products for Repair 28

3Com Corporation Limited Warranty 29

Regulatory Statements 31

4

5

I

NTRODUCTION

Welcome to the world of networking with 3Com®. In the
modern business environment, communication and sharing
information is crucial. Computer networks have proved to
be one of the fastest modes of communication but, until
recently, only large businesses could afford the networking
advantage. The OfficeConnect

®

product range from 3Com

has changed this, bringing networks to the small office.

The OfficeConnect Dual Speed Hub 5, Hub 8 and Hub 16
are ideal for creating small networks. They are compact and
attractively designed for desktop use and can be used with
other OfficeConnect products. These products form part of
the OfficeConnect range which neatly stack together with
the OfficeConnect stacking clip.

The OfficeConnect Dual Speed Hubs are easy-to-use Class II
hubs (repeaters) with 10/100BASE-TX ports. All three hubs
allow you to set up a network with both Ethernet (10Mbps)
and Fast Ethernet (100Mbps) workstations and other
devices. Refer to "Connecting Another OfficeConnect Hub"
on page 13 for more information.

When referring to these products, this guide uses the term
‘Hub’.

Each port on the Hub can be connected to either a
10BASE-T (Ethernet) or a 100BASE-TX (Fast Ethernet) device.

The port senses the speed of the connected equipment and
operates at the appropriate speed. If you wish to extend an
existing Ethernet network into Fast Ethernet, adding a Dual
Speed Hub 5, Hub 8 and Hub 16, can offer a more
cost-effective migration path than adding both a 100Mbps
hub and a 10/100Mbps switch.

Figure 1

Small Network With OfficeConnect

®

Dual Speed Hub

If you need to connect more workstations, simply use the
stacking clip to connect another OfficeConnect hub to form
a stack.

6

C

REATING YOUR

N

ETWORK

Dual Speed Hub 5 and Dual Speed 8—Front

Power LED

green

Indicates that the hub is
powered on.

Power

Collision

10M 100M

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

OfficeConnect Dual Speed Hub 8

Port Status LEDs

green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the port and the next
piece of network equipment is OK. If the LED is
flashing, the link is OK and data is being received. If the
LED is off, nothing is connected, or the connected
device is switched off, or there is a problem with the
connection (refer to the “Problem Solving” section).

Collision LEDs

yellow

Flash each time a collision is detected on the Hub's
100Mbps or 10Mbps segment. Occasional collisions
are a normal part of network operation; however,
sustained collisions may indicate network congestion.

Port Status

1

2

3

4

5

6

7

8

7

Dual Speed Hub 5 and Dual Speed 8—Rear

POWER

1x

8

10-30 VDC

1.0 A MAX

+

-

Uplink/Normal

Power Adapter socket

Only use the power adapter
that is supplied with this
OfficeConnect Dual Speed
Hub 8. Do not use any other
adapter.

Eight 10/100BASE-TX ports

Use suitable TP cable with RJ-45
connectors. You can connect the Hub to
any workstation or other equipment that
has a 10BASE-T or 100BASE-TX port. Each
port is capable of autosensing for 10Mbps
or 100Mbps operation. Ports operate in
half-duplex mode.

Uplink/Normal switch

Affects the operation of port 8. If you are
connecting another hub to port 8, set to
Uplink (in), otherwise set to Normal (out).
Refer to “Connecting Another
OfficeConnect Hub” on page 13.

Note: For Dual Speed Hub5, substitute

‘port 5’ for ‘port 8’.

WARNING: RJ-45 ports. These are
shielded RJ-45 data sockets. They
cannot be used as telephone sockets.
Only connect RJ-45 data connectors to
these sockets.

WARNHINWEIS: RJ-45-Anschlüsse

Dies sind abgeschirmte RJ-45­Datenbuchsen. Sie können nicht als
Telefonanschlußbuchsen verwendet
werden. An diesen Buchsen dürfen
nur RJ-45-Datenstecker
angeschlossen werden.

AVERTISSEMENT: Ports RJ-45. Il
s'agit de prises femelles blindées de
données RJ-45. Vous ne pouvez pas
les utiliser comme prise de
téléphone. Branchez uniquement
des connecteurs de données RJ-45
sur ces prises femelles.

8

Dual Speed Hub 16—Front

Power LED

green

Indicates that the power
supply to the Hub is

Collision LEDs

yellow

Flash each time a collision is detected on the
Hub's 100Mbps or 10Mbps segment. Occasional
collisions are a normal part of network operation;
however, sustained collisions may indicate a
problem.

Network Utilization LEDs

green / yellow / orange

(left row:10Mbps; right row:100Mbps)
Indicate how much the 100Mbps and 10Mbps
segments of your network are being used.

Power

1

2

3

4

5

6

7

8

9

10 11

12

13

14

15

16

100M10M

Collision

1%

10%

40% 80%

Port Status

Network Utilization

OfficeConnect Dual Speed Hub 16

10M 100M

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

80%1% 10% 40%

Port Status LEDs

green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the port and the next
piece of network equipment is OK. If the LED is
flashing, the link is OK and data is being received. If the
LED is off, nothing is connected, or the connected
device is switched off, or there is a problem with the
connection (refer to the “Problem Solving” section).

9

Dual Speed Hub 16—Rear

10/100BASE-TX

16

8X

1X

9X

Uplink/Normal

WARNING: RJ-45 ports. These are
shielded RJ-45 data sockets. They
cannot be used as telephone sockets.
Only connect RJ-45 data connectors to
these sockets.

WARNHINWEIS: RJ-45-Anschlüsse

Dies sind abgeschirmte RJ-45­Datenbuchsen. Sie können nicht als
Telefonanschlußbuchsen verwendet
werden. An diesen Buchsen dürfen
nur RJ-45-Datenstecker
angeschlossen werden.

AVERTISSEMENT: Ports RJ-45. Il
s'agit de prises femelles blindées de
données RJ-45. Vous ne pouvez pas
les utiliser comme prise de
téléphone. Branchez uniquement
des connecteurs de données RJ-45
sur ces prises femelles.

Power Adapter socket

Only use the power adapter
that is supplied with this
OfficeConnect Dual Speed
Hub 16. Do not use any other
adapter.

Sixteen 10/100BASE-TX ports

Use suitable TP cable with RJ-45
connectors. You can connect the Hub to
any workstation or other equipment that
has a 10BASE-T or 100BASE-TX port. Each
port is capable of autosensing for 10Mbps
or 100Mbps operation. Ports operate in
half-duplex mode.

Uplink/Normal switch

Affects the operation of port 16. If
you are connecting another hub to
port 16, set to Uplink (in), otherwise
set to Normal (out). Refer to
“Connecting Another OfficeConnect
Hub” on page 13.

10-30 VDC

1.0 A MAX

+

-

10

Before You Start

Your OfficeConnect hub comes with:

■

One power adapter for use with the OfficeConnect hub.

■

A Product Registration card for you to fill out and return.

■

Four rubber feet.

■

A stacking clip.

The extra parts mentioned in the next section are not

supplied with the hub.

Workstation Connections

To connect workstations or other equipment to your hub,
you need:

1

One 10BASE-T,
10/100BASE-TX, or
100BASE-TX adapter card
for each workstation. 3Com
produce a range of
easy-to-install network
adapter cards, which
provide your workstations with a suitable connection.

2

An operating system (for example, Netware or Windows
95/98) with network support configured, running on
your workstations.

3

One suitable TP cable for each workstation.

In order to comply with the 10BASE-T standard, ports
designed for workstation connections have been
marked with the graphical symbol ‘x’. This denotes a
crossover in the port’s internal wiring, for example 1x,
2x, 3x...

Twisted Pair (TP) Cables

To connect your workstations and other equipment to the
Hub, use ‘straight-through’ TP cables with RJ-45 connectors
(all OfficeConnect products use RJ-45 type connectors). A
‘straight-through’ cable is one where each pin of one
connector is connected to the same pin of the other
connector. Cables can be shielded (screened) or unshielded;
we recommend that you use shielded cable. Cables used for
100BASE-TX or 10/100BASE-TX connections must be data
grade (Category 5). Your supplier should stock suitable
cables.

The maximum length of a single cable is 100m (328ft).
Refer to “Fast Ethernet (100Mbps) Configuration Rules” on
page 13 for further information on cable lengths in a
100Mbps network.

Hub Connections

To connect other OfficeConnect units to your Hub, you
need one suitable TP cable for each unit.

3

2

1

11

Stacking the Units Together

The Rubber Feet

The four self-adhesive rubber feet prevent your hub from
moving around on your desk. Only stick the feet to the
marked areas at each corner of the underside of your hub if
you intend to place the unit directly on top of the desk. Do
not fix the feet if you are going to use the clip.

The Stacking Clip

The stacking clip allows you to stack your OfficeConnect
units together neatly and securely.

CAUTION: You can stack up to a maximum of four
units. Smaller units must be stacked above larger
units.

To fit the clip:

1

Place your unit on a flat surface.

2

Fit the clip across the top of the unit, as shown in
Figure 2 (picture 1), ensuring that the longer sections of
the fastening pieces are pointing downwards.

3

Align the fastening pieces over the slots found on each
side of the unit.

4

Push the clip down gently to secure it, ensuring the
fastening pieces snap into the slots on the unit.

To fit another unit:

1

Rest the second unit on top of the clip and align it with
the front of the unit below.

2

Press down gently on the unit to secure it onto the clip,
ensuring the fastening pieces fit into the slots on the unit
below, as shown in Figure 2 (picture 2).

Figure 2

Stacking Your Units Together

To remove the clip:

1

Remove the top unit together with the clip. If you hook
a finger around one of the the fastening pieces and then
pull it gently from out of the slot, the clip should come
away with the upper unit attached to it.

2

Push the clip in the center, so it bends towards the base
of the unit, and then separate once the clip is loose.

1

Fastening
Piece

2

Fastening

Piece

12

Positioning Your Hub

When installing your OfficeConnect hub, ensure:

■

It is out of direct sunlight and away from sources of
heat.

■

Cabling is away from power lines, fluorescent lighting
fixtures, and sources of electrical noise such as radios,
transmitters 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. We recommend you
provide a minimum of 25.4 mm (1in.) clearance.

Securing Your Hub

There are two slots on the underside of the OfficeConnect
hub which can be used for wall mounting. It is
recommended that you mount the hubs with the LEDs
facing upwards to prevent dust entering the cooling vents.

When wall mounting the unit, ensure that it is within

reach of the power outlet.

You need two suitable screws. Ensure that the wall you are
going to use is smooth, flat, dry and sturdy. Make two
screw holes which are 142mm (5.6in.) apart. Use the
template at the back of this guide to mark the position of
the holes. Fix the screws into the wall, leaving their heads
3mm (0.12in.) clear of the wall surface.

Remove any connections to the unit and locate it over the
screw heads. When in line, gently push the unit on to the
wall and move it downwards to secure. When making
connections, be careful not to push the unit up and off the
wall.

CAUTION: Only wall mount single units, do not wall
mount stacked units.

Also available from 3Com, is the OfficeConnect Mounting
Unit (part number 3C16765). This allows you to firmly
secure a stack of OfficeConnect devices to the desktop or
onto a shelf in a rack.

13

Connecting Workstations and Other
Equipment to Your Hub

WARNING: Please read the ‘Important Safety
Information’ section before you start.

WARNHINWEIS: 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.

CAUTION: The equipment connected to the Hub
must be set to operate in auto-negotiate or half
duplex mode.

Connecting workstations and other equipment to your Hub
is easy. To connect a workstation to any of the Hub’s ports,
use a ‘straight-through’ TP cable. Refer to “Twisted Pair (TP)
Cables” on page 10 for further information.

If you are using port 5 (Dual Speed Hub 5) or 8 (Dual
Speed Hub 8) or 16 (Dual Speed Hub 16) to connect a
workstation, ensure the Uplink/Normal switch is set to
Normal (out).

TP cables are very easy to use. To connect a cable, simply
slot the connector into the appropriate RJ-45 port. When

the connector is fully in, its latch locks it in to place. To
disconnect the cable, push the connector’s latch in and
remove it.

The Hub detects all port connections, so you can start using
your network immediately. If you need more ports, simply
add another OfficeConnect hub.

Connecting Another OfficeConnect Hub

You may wish to connect another OfficeConnect hub to
your Dual speed Hub. Alternatively, you may wish to add
your Hub to an existing 10Mbps network. When extending
your network, you should be aware of the configuration
rules.

If you connect two Dual Speed Hub units directly
together, the link between them operates at
100Mbps.

Fast Ethernet (100Mbps) Configuration Rules

The Dual Speed Hub 8 and Dual Speed Hub 16 are Class II
hubs. You can connect directly two Class II Fast Ethernet
hubs (Class I Fast Ethernet hubs cannot be connected
directly to other Fast Ethernet hubs). The total length of
cable (A + B + C) between two workstations, or between a
workstation and a non-repeater piece of equipment (such as
a switch), must not exceed 205m (672ft). Each cable (A, B,
or C) must not exceed 100m (328ft), as shown in Figure 3
overleaf.

14

3Com recommends that the cable (B) between the Fast
Ethernet hubs is no longer than 5m (16.4ft). This allows the
maximum hub-to-workstation cable length (A or C) of 100m
(328ft).

Figure 3

Configuration Rules and Example of a Fast Ethernet

(100Mbps) Network

Ethernet (10Mbps) Configuration Rules

You can connect a maximum of four Ethernet (10Mbps)
hubs in series between workstations, or between a
workstation and a non-repeater piece of equipment (such as
a switch). Each cable must not exceed 100m (328ft). An
example is shown in Figure 4.

Figure 4

Example of an Ethernet (10Mbps) Network

15

Making the Connection to Another Hub

You can connect a 10BASE-T, 100BASE-TX, or another
10/100BASE-TX OfficeConnect hub to any port on the Dual
Speed Hub. Use the following method:

1

Using a straight-through cable, connect the
Uplink/Normal port of the Dual Speed Hub to any of the
ports on the other hub (as shown in Figure 5). If using an
Uplink/Normal port on the other hub, set its
Uplink/Normal switch to Normal (out).

2

Set the Uplink/Normal switch for the Uplink/Normal port
on the Dual Speed Hub to Uplink (in).

Checking Hub Connections

When you have connected all the appropriate workstations
and other equipment to the Hub, power on the Hub. For
each port with a connection, a Port Status LED should be
on. If the port is operating at 100Mbps, the LEDs light
green. If the port is operating at 10Mpbs, the LEDs light
yellow. If neither LED is on, check your connections.

Spot Checks

At frequent intervals, visually check that:

■

Case vents are not obstructed.

■

Cabling is secure and not pulled taut.

Figure 5

Correct Connections for OfficeConnect Hubs

16

P

ROBLEM SOLVING

The OfficeConnect Hub 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 damaged 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
5 seconds and then power each one on.

Check the following symptoms and solutions:

Power LED not lit. Check your power adapter connection.
If there is still no power, you may have a faulty power
adapter which needs replacing with an identical
OfficeConnect power adapter. Do not use any other

power adapter with the Hub.

10Mbps Port Status LED lit for a port with a 100Mbps
device connected. This may be because the cable is not of

a high enough quality to carry Fast Ethernet signals (we
recommend you use a Category 5 cable), or due to a
problem with the network card (NIC) of the attached
equipment.

Link between the Hub and another OfficeConnect hub
not working. Check your connections; follow the

information given in the “Connecting Another
OfficeConnect Hub” section on page 13. It is likely that an
Uplink/Normal switch is incorrectly set.

Port Status LED not lit for a port that has a
connection. Check the following:

■

You are using a ‘straight-through’ cable which is properly
connected at both ends, and is not damaged. Refer to
“Twisted Pair (TP) Cables” on page 10.

■

The equipment connected to the Hub is powered on,
operating correctly and contains the correct type of
connection. Refer to Figure 6 to compare the wiring of a
straight-through and a crossover cable.

■

Your PCs network drivers have loaded and initialised
correctly.

17

Figure 6

Straight-through Cable/Crossover Cable

18

N

ETWORKING TERMINOLOGY

A Network is a collection of workstations (for example,
IBM-compatible PCs) and other equipment (for example,
printers), connected for the purpose of exchanging
information or sharing resources. Networks vary in size,
some are within a single room, others span continents.

A Local Area Network (LAN) is a network, usually in an
office, that spans no more than a single site.

Ethernet is a type of LAN, referring to the technology used
to pass information around the network. It operates at
10Mbps (megabits per second).

Fast Ethernet is a type of LAN that runs up to 10 times
faster than standard Ethernet. It operates at 100Mbps.

10BASE-T and 100BASE-TX are the names given to the
Ethernet protocol that runs over Twisted Pair (TP) cable.
10BASE-T runs at 10Mbps whilst 100BASE-TX operates at
100Mbps. The OfficeConnect hub uses RJ-45 type
connectors for connecting your TP network.

A Network Loop occurs when two pieces of network
equipment are connected by more than one path. Your hub
detects this and partitions (isolates) one of its ports to
break the loop.

A segment is the length of cable connected to a port.

Packets are the units of information your workstations and
other equipment send to each other over the network. A
frame is the data part of the packet and can be unicast
(sent to a single device), multicast (sent to multiple
devices), or broadcast (sent to all devices).

Bandwidth refers to the amount of network traffic the
network can hold at any one time (information capacity)
measured in bits per second (bps). Workstations or
applications that use the network heavily are referred to as
using high bandwidth. Fast Ethernet has a higher
bandwidth than Ethernet, so it can cope with larger
amounts of traffic, which results in faster operation.

A half duplex link allows information to flow in either
direction, but not in both directions simultaneously.

Collisions are part of normal ethernet operation and occur
if other network equipment attempts to transmit at the
same time. A sudden sustained increase in the number of
collisions may indicate a problem with the device.

19

D

IMENSIONS AND STANDARDS

Dimensions and Operating Conditions Standards

Functional: ISO 8802/3

IEEE 802.3

Safety: UL 1950, EN 60950

CSA 22.2 #950
IEC 950

EMC: EN 55022 Class B

EN 50082-1
FCC Part 15 Class B*
ICES-003 Class B
VCCI Class B

CNS 13438 Class A

Environmental: EN 60068 (IEC 68)

*Refer to “Regulatory Statements” on page 31 for
conditions of operation. †

220mm (8.7in.)

35.8mm
(1.4in.)

135.4mm (5.3in.)

3 VA

10.24 BThU/hr
power requirement

0 to 90%
(non-condensing)
humidity

0 to 40°C (32 to 105°F)
operating
temperature

Dual Speed Hub 5 600g (1.3 lb)
Dual Speed Hub 8 600g (1.3 lb)

228mm (9.12in.)

54mm
(2.1in.)

185mm (7.3in.)

8 VA

27.30 BThU/hr
power requirement

0 to 90%
(non-condensing)
humidity

0 to 40°C (32 to 105°F)
operating
temperature

Dual Speed Hub 16 1kg (2.2 lb)

20

E

NVIRONMENTAL STATEMENTS

It is the policy of 3Com Corporation to be
environmentally-friendly in all operations. To uphold our
policy, we are committed to:

■

Establishing environmental performance standards that
comply with national legislation and regulations.

■

Conserving energy, materials and natural resources in all
operations.

■

Reducing the waste generated by all operations.

■

Ensuring that all waste conforms to recognized
environmental standards.

■

Maximizing the recyclable and reusable content of all
products.

■

Ensuring that all products can be recycled, reused and
disposed of safely.

■

Ensuring that all products are labelled according to
recognized environmental standards.

■

Improving our environmental record on a continual basis.

End Of Life Statement

3Com processes allow for the recovery, reclamation and safe
disposal of all end-of-life electronic components.

Regulated Materials Statement

3Com products do not contain any hazardous or
ozone-depleting material.

Environmental Statement about the Documentation

The documentation for this product is printed on paper that
comes from sustainable, managed forests; it is fully
biodegradable and recyclable, and is completely
chlorine-free. The varnish is environmentally-friendly, and the
inks are vegetable-based with a low heavy-metal content.

Environmental Statement about the Product
Packaging

The packaging for this product is fully recyclable. It has a
recycled (post consumer) waste content of at least 40% by
weight, and no heavy-metal content.

21

I

MPORTANT SAFETY INFORMATION

WARNING: Warnings contain directions that you
must follow for your personal safety. Follow all
directions carefully.
You must read the following safety information
carefully before you install or remove the unit:

■

Exceptional care must be taken during installation and
removal of the unit.

■

Only stack the OfficeConnect hub with other
OfficeConnect units.

■

To ensure compliance with international safety standards,
only use the power adapter that is supplied with the
unit.

■

The socket outlet must be near to the unit and easily
accessible. You can only remove power from the unit by
disconnecting the power adaptor from the outlet.

■

This unit operates under SELV (Safety Extra Low Voltage)
conditions according to IEC 950. The conditions are only
maintained if the equipment to which it is connected
also operates under SELV conditions.

■

There are no user-replaceable fuses or user-serviceable
parts inside the hub. If you have a physical problem with
the unit that cannot be solved with problem solving
actions in this guide, contact your supplier.

■

Disconnect the power adapter before moving the unit.

WARNING: RJ-45 ports. These are shielded RJ-45
data sockets. They cannot be used as telephone
sockets. Only connect RJ-45 data connectors to these
sockets.

22

W

ICHTIGE SICHERHEITSHINWEISE

WARNHINWEIS: Warnhinweise enthalten

Anweisungen, die Sie zu Ihrer eigenen Sicherheit

befolgen müssen. Alle Anweisungen sind sorgfältig zu

befolgen.

Sie müssen die folgenden Sicherheitsinformationen

sorgfältig durchlesen, bevor Sie das Geräts installieren

oder ausbauen:

■

Bei der Installation und beim Ausbau des Geräts ist mit
höchster Vorsicht vorzugehen.

■

Stapeln Sie das Geräts nur mit anderen OfficeConnect
Gerätes zusammen.

■

Aufgrund von internationalen Sicherheitsnormen darf das
Gerät nur mit dem mitgelieferten Netzadapter verwendet
werden.

■

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 950. Diese Bedingungen sind nur gegeben, wenn
auch die an das Gerät angeschlossenen Geräte unter
SELV-Bedingungen betrieben werden.

■

Es sind keine von dem Benutzer zu ersetzende oder zu
wartende Teile in dem Gerät vorhanden. Wenn Sie ein
Problem mit dem Switch haben, das nicht mittels der
Fehleranalyse in dieser Anleitung behoben werden kann,
setzen Sie sich mit Ihrem Lieferanten in Verbindung.

■

Vor dem Ausbau des Geräts das Netzadapterkabel
herausziehen.

WARNHINWEIS: RJ-45-Anschlüsse. Dies sind
abgeschirmte RJ-45-Datenbuchsen. Sie können nicht
als Telefonanschlußbuchsen verwendet werden. An
diesen Buchsen dürfen nur RJ-45-Datenstecker
angeschlossen werden.

23

C

ONSIGNES IMPORTANTES DE SÉCURITÉ

AVERTISSEMENT: Les avertissements présentent des
consignes que vous devez respecter pour garantir
votre sécurité personnelle. Vous devez respecter
attentivement toutes les consignes.
Nous vous demandons de lire attentivement les
consignes suivantes de sécurité avant d’installer ou de
retirer l’appareil:

■

Faites très attention lors de l'installation et de la dépose
du groupe.

■

Seulement entasser le moyer avec les autres moyeux
OfficeConnects.

■

Pour garantir le respect des normes internationales de
sécurité, utilisez uniquement l'adaptateur électrique remis
avec cet appareil.

■

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.

■

L’appareil fonctionne à une tension extrêmement basse
de sécurité qui est conforme à la norme CEI 950. Ces
conditions ne sont maintenues que si l'équipement
auquel il est raccordé fonctionne dans les mêmes
conditions.

■

Il n’y a pas de parties remplaceables par les utilisateurs
ou entretenues par les utilisateurs à l’intérieur du moyeu.
Si vous avez un problème physique avec le moyeu qui ne
peut pas être résolu avec les actions de la résolution des
problèmes dans ce guide, contacter votre fournisseur.

■

Débranchez l'adaptateur électrique avant de retirer cet
appareil.

AVERTISSEMENT: Ports RJ-45. Il s'agit de prises
femelles blindées de données RJ-45. Vous ne pouvez
pas les utiliser comme prise de téléphone. Branchez
uniquement des connecteurs de données RJ-45 sur
ces prises femelles.

24

T

ECHNICAL SUPPORT

3Com provides easy access to technical support information
through a variety of services. This section describes these
services.

Information contained in this section is correct at time of
publication. For the most recent information, 3Com
recommends that you access the 3Com Corporation World
Wide Web site.

Online Technical Services

3Com offers worldwide product support 24 hours a day,
7 days a week, through the following online systems:

■

World Wide Web site.

■

3Com Knowledgebase Web Services.

World Wide Web Site

To access the latest networking information on the
3Com Corporation World Wide Web site, enter this URL
into your Internet browser:

http://www.3com.com/

This service provides access to online support information
such as technical documentation and software, as well as
support options that range from technical education to
maintenance and professional services.

3Com Knowledgebase Web Services

This interactive tool contains technical product information
compiled by 3Com expert technical engineers around the
globe. Located on the World Wide Web at:

http://knowledgebase.3com.com

This service gives all 3Com customers and partners
complementary, round-the-clock access to technical
information on most 3Com products.

25

Support from Your Network Supplier

If you require additional assistance, 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:

■

Product model name, part number, and serial number.

■

A list of system hardware and software, including revision
levels.

■

Diagnostic error messages.

■

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.

Support from 3Com

If you are unable to obtain assistance from the 3Com online
technical resources or from your network supplier, 3Com
offers technical telephone support services. To find out more
about your support options, call the 3Com technical
telephone support phone number at the location nearest
you.

When you contact 3Com for assistance, have the following
information ready:

■

Product model name, part number, and serial number.

■

A list of system hardware and software, including revision
levels.

■

Diagnostic error messages.

■

Details about recent configuration changes, if applicable.

26

Here is a list of worldwide technical telephone support numbers:

Country Telephone Number Country Telephone Number
Asia, Pacific Rim

Australia
Hong Kong
India
Indonesia
Japan
Malaysia
New Zealand
Pakistan
Philippines

1 800 678 515
800 933 486
[phone]
001 800 61 009
0031 61 6439
1800 801 777
0800 446 398
[phone]
1235 61 266 2602

P. R . o f C h i n a

Singapore
S. Korea

From anywhere in S. Korea:

From Seoul:
Taiwan, R.O.C.
Thailand

10800 61 00137 or
021 6350 1590
800 6161 463

00798 611 2230
(0)2 3455 6455
0080 611 261
001 800 611 2000

Europe

From anywhere in Europe, call: [phone] phone

[phone] fax

Europe, South Africa, and Middle East

From the following countries, you may use the toll-free numbers:

Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy

0800 297468
0800 71429
800 17309
0800 113153
0800 917959
0800 1821502
00800 12813
1800 553117
1800 9453794
1678 79489

Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.

0800 0227788
800 11376
00800 3111206
0800 831416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197

27

Latin America

Argentina
Brazil
Chile
Colombia

AT&T [phone]
0800 13 3266
1230 020 0645
98012 2127

Mexico
Peru
Puerto Rico
Venezuela

01 800 CARE (01 800

2273)
AT&T [phone]
800 666 5065
AT&T [phone]

North America

1 800 876-3266

Country Telephone Number Country Telephone Number

28

Returning Products for Repair

Before you send a product directly to 3Com for repair, you
must first obtain a Return Material Authorization (RMA)
number. Products sent to 3Com without authorization
numbers will be returned to the sender unopened, at the
sender’s expense.

To obtain an authorization number, call or fax:

Country Telephone Number Fax Number

Asia, Pacific Rim + 65 543 6500 + 65 543 6348

Europe, South Africa,
and Middle East

+ 31 30 6029900 + 31 30

6029999

Latin America 1 408 326 2927 1 408 326 3355

From the following countries, you may call the toll-free numbers;
select option 2 and then option 2:

Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.

0800 297468
0800 71429
800 17309
0800 113153
0800 917959
0800 1821502
00800 12813
1800553117
1800 9453794
1678 79489
0800 0227788
800 11376
00800 3111206
0800 831416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197

U.S.A. and Canada 1 800 876 3266 1 408 326 7120

(not toll-free)

Country Telephone Number Fax Number

29

3Com Corporation L

IMITED WARRANTY

3Com OfficeConnect Dual Speed Hub 5, Hub 8, Hub 16

The duration of the warranty for the OfficeConnect Dual Speed Hub 5 (3C16755), Dual Speed
Hub 8 (3C16753) and Dual Speed Hub 16 (3C16754) is lifetime, including the power adapter.

Advance hardware exchange is available during the first year from your date of purchase in
accordance with 3Com’s standard terms and conditions for such service. After the first year the
warranty reverts to 3Com’s standard lifetime limited warranty.

To qualify for the lifetime limited warranty and the advance hardware exchange you must
submit the appropriate product warranty registration card to 3Com, otherwise this product will
be warranted for a period of one (1) year without advance hardware exchange.

H

ARDWARE

3Com warrants this hardware product to 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:

One (1) year (unless otherwise specified above)
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 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.

S

OFTWARE

3Com warrants that each software program licensed from it 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. 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.

O

BTAINING 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 Return Material Authorization
(RMA) number 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. 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.

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 by advance
replacement. 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. When an advance 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.

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.

ADDITIONAL SERVICES:
Telephone Support. This OfficeConnect® product comes with telephone technical support for
ninety (90) days. The ninety (90) day period begins on the date of Customer's product
purchase.

The telephone technical support is available from 3Com from 9 a.m. to 5 p.m., local time,
Monday through Friday, excluding local holidays. Telephone technical support is limited to the
3Com products designated above and may include assistance with installation, product specific
configuration, and identification of equipment problems. Please refer to the Technical Support
appendix in the User Guide for telephone numbers.

Response to requests 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.

To qualify for this 90 days of telephone technical support, you must register on the 3Com Web
site at http://support.3Com.com/index.htm, and provide your date of purchase, product
number, and serial number. 3Com reserves the right to modify or cancel this telephone
support offering at any time, without advance notice. This offer is not available where
prohibited or restricted by law.

3Com’s Web and Bulletin Board Service are available at no charge, and provide software and
firmware upgrades, a bug list, and technical information about 3Com products.

W

ARRANTIES 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

30

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, OTHER HAZARDS,
OR ACTS OF GOD.

L

IMITATION 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.

D

ISCLAIMER

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.

G

OVERNING LAW

This Limited Warranty shall be governed by the laws of the State of California, U.S.A. excluding
its conflicts of laws principles and excluding the United Nations Convention on Contracts for
the International Sale of Goods.

3Com Corporation
5400 Bayfront Plaza
Santa Clara, CA 95054
[phone]

31

R

EGULATORY STATEMENTS

FCC S

TATEMENT

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, and the Canadian Department of
Communications Equipment Standards entitled, “Digital Apparatus,” ICES-003. These limits are
designed to provide reasonable 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 accordance 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 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.

■

Consult the dealer or an experienced radio/television technician for help.

I

NFORMATION TO THE USER

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.

CSA S

TATEMENT

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

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.

This product complies with the European Low Volatage Directive 73/23/EEC and EMC Directive
89/336/EEC as amended by European Directive 93/68/EEC.

VCCI S

TATEMENT

BCIQ S

TATEMENT

Wall mounting screw hole guide

142mm (5.6in.)

Part No. DUA1675-1AAA05
Published May 2001

32