3C16753
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.
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provided to you.
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If you are a United States government agency, then this documentation and the software
described herein are provided to you subject to the following:
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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
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■
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■
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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.
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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
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