OfficeConnect
®
Ethernet Hub 4, 4C, 8, 8C
User Guide (3C16704A, 3C16703A, 3C16700A, 3C16701A)
3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145
Copyright © 1999, 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.
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changes in content from time to time without obligation on the part of 3Com
Technologies to provide notification of such revision or change.
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the implied warranties, terms or conditions of merchantability, satisfactory
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changes in the product(s) and/or the program(s) described in this documentation
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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, the 3Com logo and OfficeConnect are registered trademarks of
3Com Corporation.
Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of
Microsoft Corporation. Novell and NetWare are registered trademarks of
Novell, Inc.
All other company and product names may be trademarks of the respective
companies with which they are associated.
Year 2000 Compliance:
products, visit the 3Com Year 2000 Web page:
http://www.3com.com/products/yr2000.html
Environmental Statement:
Please e-mail any comments about this document to 3Com at:
pddtechpubs_comments@3Com.com.
(OfficeConnect Ethernet Hub 4, Hub 4C, Hub 8, Hub 8C), part number
(DUA1670-0AAA04) and, if appropriate, the page number.
For information on Year 2000 compliance and 3Com
Please recycle this user guide after use.
Please include the document title
Introduction 5
Problem Solving for the Hub 4 and 4C 15
Creating your Network 6
What Else Do I Need? 6
Workstation Connections 6
Transceiver Connections 6
Hub Connections 7
10BASE-2 7
10BASE-T 7
Twisted Pair (TP) Cables 7
Stacking the Units Together 8
The Rubber Feet 8
The Stacking Clip 8
Positioning Your Hub 9
Securing Your Hub 9
Using Your Hub 9
The OfficeConnect Ethernet Hub 4 and 4C 10
Ethernet Hub 4 and 4C—Front 10
Ethernet Hub 4 and 4C—Rear 11
Connecting Workstations and Other Equipment to Your Hub 12
Connecting Transceivers to the AUI Port 12
Connecting OfficeConnect Ethernet Hubs Together 12
Connecting Hubs Using 10BASE-2 13
Checking Connections 13
Connecting Hubs Using 10BASE-T 14
Checking Connections 14
Spot Checks 14
The OfficeConnect Ethernet Hub 8 and 8C 17
Ethernet Hub 8 and 8C—Front 17
Ethernet Hub 8 and 8C—Rear 18
Connecting Workstations and Other Equipment to Your Hub 19
Connecting OfficeConnect Ethernet Hubs Together 19
Connecting Hubs Using 10BASE-2 20
Checking Connections 20
Connecting Hubs Using 10BASE-T 21
Checking Connections 21
Spot Checks 21
Problem Solving for the Hub 8 and 8C 22
Networking Terminology 24
Dimensions and Standards 25
Dimensions and Operating Conditions 25
Standards 25
Environmental Statements 26
End Of Life Statement 26
Regulated Materials Statement 26
Environmental Statement about the Documentation 26
Environmental Statement about the Product Packaging 26
Important Safety Information 27
Wichtige Sicherheitshinweise 28
3
Consignes importantes de sécurité 29
Technical Support 30
Online Technical Services 30
World Wide Web Site 30
3Com Knowledgebase Web Services 30
Support from Your Network Supplier 31
Support from 3Com 31
Returning Products for Repair 34
3Com Corporation Limited Warranty 35
Electromagnetic Compatibility 38
4
NTRODUCTION
I
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 advantage of
networking. The OfficeConnect
®
product range from 3Com
has changed this, bringing networks into the small office.
The OfficeConnect Ethernet Hub 4, OfficeConnect Ethernet
Hub 4C, OfficeConnect Ethernet Hub 8 and OfficeConnect
Ethernet Hub 8C, are ideal for creating small networks. They
are compact and attractively designed for desktop use.
These four products are part of the OfficeConnect range
which stack neatly together with the OfficeConnect stacking
clip.
This user guide describes how to use the OfficeConnect
hubs. The hubs have similar features and so this user guide
contains general and specific information. When referring to
all products, this guide uses the term ‘OfficeConnect hub’.
A single OfficeConnect hub allows you to create a small
network with up to four or eight workstations, as shown in
Figure 1. If you need to connect more workstations, simply
use the stacking clip to connect another OfficeConnect hub
to form a stack (each hub is a single repeater).
Figure 1
Print Server
Small Network With OfficeConnect Hub and Optional
HP JetDirect
OfficeConnect
print server
OfficeConnect hub
The OfficeConnect hubs have the following ports:
The Ethernet Hub 4 has four 10BASE-T ports.
■
The Ethernet Hub 4C has four 10BASE-T ports, a
■
10BASE-2 port and an AUI port.
The Ethernet Hub 8 has eight 10BASE-T ports.
■
The Ethernet Hub 8C has eight 10BASE-T ports and a
■
ninth 10BASE-2 port.
5
REATING YOUR
C
ETWORK
N
What Else Do I Need?
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.
■
Two unit labels and eight cable ties.
■
An OfficeConnect Network Assistant CD-ROM.
■
2
An operating system (for example, Netware or
Windows 95/98) with network support configured,
running on your workstations.
3
One straight-through TP cable for every workstation, as shown in Figure 2.
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...
To connect workstations and additional OfficeConnect hubs
to your hub, you need extra equipment. The extra
equipment listed in the next section is
provided with
not
the hub.
Workstation Connections
To connect workstations and other equipment to your hub,
you need:
1
10BASE-T connections for all
your equipment. 3Com produce
3
a range of easy to install
network adapter cards, which
provide your workstations with
2
1
10BASE-T connections.
Transceiver Connections
If you want to connect a transceiver to your hub (Hub 4C
only), you need:
An AUI cable. The maximum length you can use is 50m
■
(164ft).
A 10Mbps Ethernet transceiver for the chosen media
■
type. 3Com produce a range of easy to use transceivers.
6
Hub Connections
Depending on what ports your hub has, you can use either
10BASE-T or 10BASE-2 to connect your hubs together:
With 10BASE-2 you can connect up to 30 hubs on a
■
single segment, leaving all of the 10BASE-T ports free.
With 10BASE-T you can connect up to four hubs in
■
series.
10BASE-2
To connect additional hubs using 10BASE-2 (Hub 4C and 8C
only), you need (as shown in Figure 2):
One 10BASE-2 50 Ohm cable for each additional hub.
■
The minimum cable length you can use is 0.5m (1.6ft).
The maximum segment length is 185m (607ft).
One 10BASE-2 ‘Y’ piece for each hub. You can use ‘T’
■
pieces but ‘Y’ pieces provide optimal clearance of the
other ports.
Two 10BASE-2 50 Ohm terminators (end pieces).
■
10BASE-T
If you have additional hubs you want to connect using
10BASE-T, you need:
One straight-through TP cable for each extra hub.
■
Twisted Pair (TP) Cables
To connect your workstations and hubs, you must use
straight-through TP cable with RJ-45 connectors. Cables can
be shielded (screened) or unshielded; we recommend that
you use shielded. The maximum length you can use is 100m
(328ft). A straight-through cable is one where the pins of
one connector are connected to the same pins of the other
connector.
Figure 2
Ter mi na to r
(end piece)
Some of the 10BASE-2 Equipment You May Need
or
‘Y’ piece
‘T’ piece
7
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 blue stacking clip allows you to stack your
OfficeConnect units together securely.
CAUTION: You can stack up to a maximum of four
units. Smaller units must be stacked above larger
units.
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 3 (picture 2).
Figure 3
1
Stacking Your Units Together
Fastening
Piece
2
Fastening
Piece
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 3 (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 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.
8
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 25.4mm (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 your hub, 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 150mm (5.9in.) 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 hub and locate it over the
screw heads. When in line, gently push the hub on to the
wall and move it downwards to secure. When making
connections, be careful not to push the hub up and off the
wall.
CAUTION: Only wall mount single hubs, do not wall
mount stacked hubs.
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.
Using Your Hub
You are now ready to create your network, using your
OfficeConnect hub.
Read pages 10–16 if you have an:
OfficeConnect Ethernet Hub 4 or Hub 4C
■
Read pages 17–23 if you have an:
OfficeConnect Ethernet Hub 8 or 8C
■
When you have connected your equipment, you are ready
to use your network. If you suspect there is a problem, refer
to (depending on your hub):
“Problem Solving for the Hub 4 and 4C” on page 15
■
“Problem Solving for the Hub 8 and 8C” on page 22
■
9
THE O
FFICECONNECT ETHERNET
Ethernet Hub 4 and 4C—Front
HUB 4
AND
4C
Alert LED
orange
Alerts you to excessive
network use or an
isolated (partitioned)
10BASE-T port.
Alert
Power
Power LED
green
Indicates that the hub is
powered on.
Activity LED
(Hub 4 only)
yellow
Flashes each time
a packet is
received on a
port.
Collision
Activity
Green = OK, Yellow = Partitioned
10BASE-T Port Status LEDs
green/yellow
Indicates the status of each 10BASE-T port.
green
piece of network equipment is OK.
yellow
that segment.
off
has failed.
Port Status
1234
Collision LED
yellow
Flashes each time a collision is detected
on the network. Collisions are part of
normal network operation.
— The link between the port and the next
— The port has partitioned due to a fault on
— Nothing is connected to the port or the link
AUI/COAX
Green=AUI
off=COAX
Partitioned
1% 2% 3% 6% 12% 25% 50% 80%
AUI/COAX Status LEDs (Hub 4C only)
green/off=media, yellow=partition
Indicates the status of the AUI or 10BASE-2 port, depending on which one is in use.
green/off
— The left-hand status LED is green if the AUI port is in use, and off if either
the 10BASE-2 port is being used or nothing is connected to the port.
yellow
— If the right-hand status LED is yellow, the port in use has been partitioned.
10
Network Utilization LEDs (Hub 4C only)
green/yellow/orange
Indicates how much your network is being used.
Network Utilization
OfficeConnect Ethernet Hub 4C
Ethernet Hub 4 and 4C—Rear
Power Adapter socket
Only use the power adapter that is supplied with
this OfficeConnect hub. Do not use any other
adapter.
POWER COAX AUI
10BASE-2 port
Can be used to connect your hub to other OfficeConnect
hubs and equipment with 10BASE-2 cabling.
If used, it is effectively a fifth port. Refer to “Connecting
Hubs Using 10BASE-2” on page 13.
(Hub 4C only)
AUI port
Allows 10Mbps transceivers of different media types
to be connected to the hub. Connecting a
transceiver automatically disables the 10BASE-2
port.
(Hub 4C only)
Uplink
Normal
4
Uplink/Normal switch
Affects the operation of port 4. For correct usage, refer to
“Connecting Hubs Using 10BASE-T” on page 14.
Four 10BASE-T RJ-45 ports
Use 10BASE-T cable with RJ-45
connectors. You can connect the
OfficeConnect hub to any workstation
or piece of equipment that has a
10BASE-T port. Refer to “Connecting
Hubs Using 10BASE-T” on page 14.
1x
11
Connecting Workstations and Other Equipment to Your Hub
The hub detects all port connections, so you can start using
your network immediately. When you need more ports,
simply add more OfficeConnect hubs.
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: Do not power the hub off and on quickly.
Wait about five seconds between power cycles.
Connect workstations and other equipment to any of the
hub’s 10BASE-T RJ-45 ports using 10BASE-T cables.
To connect a 10BASE-T cable, simply slot the connector into
the relevant RJ-45 port. When the connector is fully in, its
latch locks it into place. To disconnect the cable, push the
connector’s latch in and remove it.
If you are using port 4 to connect to a workstation
using a straight-through TP cable, ensure the
Uplink/Normal switch is set to Normal (out).
Connecting Transceivers to the AUI Port
You can connect a 10Mbps Ethernet transceiver to your hub
(Hub 4C only), using a standard AUI cable. Connect one
end of the cable to the transceiver and the other end to the
AUI port on the hub’s rear panel. This automatically disables
the 10BASE-2 port, and activates the AUI/COAX LED to
show the external transceiver is in use. Engage the slide
locks at both ends of the AUI cable.
Connecting OfficeConnect Ethernet Hubs Together
You can increase the number of workstations that can
connect to your network by adding more OfficeConnect
hubs. You can use either 10BASE-T or 10BASE-2 (Hub 4C
only) to do this.
Do not connect the same two hubs together using
both 10BASE-T and 10BASE-2. This causes a network
loop.
If you do not use the 10BASE-2 port, you do not
need to connect a terminator (end piece) to it. If the
AUI port is not used and a terminator is not
connected to the 10BASE-2 port, the port partitions
and the Coax Status LED lights yellow. This is correct
operation.
12
Connecting Hubs Using 10BASE-2
Connect a 10BASE-2 ‘Y’ piece to each of your hubs
(Hub 4C only). Connect the ‘Y’ pieces with 10BASE-2 cable
to form a single segment, as shown in Figure 4. Remember
to terminate the two free ends of the segment by fitting
terminators (end pieces).
To disconnect a 10BASE-2 cable, twist each connector
counter-clockwise to unlock it, and remove it.
If you have connected a 10Mbps Ethernet transceiver
to the AUI port, the 10BASE-2 port will be disabled.
You can use this transceiver to connect your hubs but
we recommend that you connect your hubs using
10BASE-T cable (refer to the next section).
When using 10BASE-2 cable, it is important that both
ends of the segment are properly terminated with 50
Ohm terminators (end pieces).
Only use 50 Ohm 10BASE-2 cables and a ‘Y’ piece for
each hub. You can use ‘T’ pieces but ‘Y’ pieces
provide optimum clearance of the other ports.
Checking Connections
When you have connected your hubs, power them on.
The Port Status LEDs for the 10BASE-2 ports you have used
should be off. If they are not, check your connections.
Figure 4
Correct Hub Connections Using 10BASE-2
50 Ohm
terminator
10BASE-2 50 Ohm cable.
Minimum length of
each cable is 0.5m (1.6ft)
Maximum segment length is 185m (607ft)
(from terminator to terminator)
AUI
AUI
AUI
AUI
‘Y’ piece
50 Ohm
terminator
Uplink
Normal
Uplink
Normal
Uplink
Normal
13
Connecting Hubs Using 10BASE-T
1x
10BASE-T cable
with RJ-45 connectors.
Maximum length of
each cable is 100m (328ft)
Switch set to
Normal (out)
Switches
set to
Uplink (in)
Uplink
Normal
AUI
Uplink
Normal
AUI
Uplink
Normal
AUI
1x
1x
4
You can connect hubs together with 10BASE-T in a number
of ways, but for simplicity we recommend the following
method, as shown in Figure 5:
1
Starting from the bottom, connect the port 4 of the
lower hub to port 3 of the hub immediately above.
Repeat this for each hub.
2
Set all Uplink/Normal switches to Uplink (in) except for
the top hub (the one with port 4 not connected to
another hub). This unused port can be connected to a
workstation provided that the Uplink/Normal switch is set
to Normal (out).
Checking Connections
When you have connected your hubs, power them on. The
Port Status LEDs for the 10BASE-T ports you have used
should be green. If they are not, check your connections. If
the 10BASE-2 port is not used and is not terminated and
the AUI port is not being used (if applicable), the LED
should be yellow showing that it has partitioned. This is
correct operation.
Spot Checks
At frequent intervals, visually check that:
The Alert LED is not lit — this is the best way to find out
■
if there are problems with your network
Case vents are not obstructed
■
Cabling is secure and not pulled taut
■
If you suspect there is a problem, refer to “Problem Solving
for the Hub 4 and 4C” on page 15.
Figure 5
14
Correct Hub Connections Using 10BASE-T
ROBLEM SOLVING FOR THE
P
HUB 4
AND
4C
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 equipment is powered on.
■
Power off the hubs, wait about 5 seconds and then
■
power on the hubs.
Check the following symptoms and solutions:
Power LED not lit.
If there is still no power, you may have a faulty power
adapter which needs replacing with another OfficeConnect
power adapter.
with the hub.
Alert LED continuously lit.
excessive use of your network (over 80%) or, more likely, a
10BASE-T port has partitioned due to a loop in your
network (in which case the corresponding Port Status LED
will be yellow). Examine your connections and remove the
loop. Each piece of equipment needs only one connection
to your OfficeConnect hub.
Check your power adapter connection.
Do not use any other power adapter
There is either continual
Port Status LED yellow for a 10BASE-T port.
that there is a loop in your network which has caused this
port to partition. Examine your connections and remove the
loop. Each piece of equipment needs only one connection
to your OfficeConnect hub. The LED will change from
yellow to green, on receiving a valid packet on the port.
Link between two OfficeConnect hubs not working.
Check your hub connections; follow the information given
for your hub. With 10BASE-T it is likely an Uplink/Normal
switch is incorrectly set. With 10BASE-2 it is likely a
terminator (end piece) is not properly fitted; this would
cause the Coax Port Status LED to light yellow (partition).
AUI/COAX Port Status LED not lit when external
transceiver in use.
connected to the hub and to the external transceiver. Ensure
both slide locks are engaged.
AUI/COAX Port Status LED yellow when the 10BASE-2
port is not being used.
correct operation.
Check the AUI cable is correctly
The port has partitioned. This is
It is likely
15
Port Status LED not lit for a 10BASE-T port that has a
connection.
There is a problem with this connection.
Check that you are using a straight-through 10BASE-T cable
which is properly connected at both ends, and is not
damaged. If the cable is connected to port 4, ensure that
the Uplink/Normal switch is set to Normal (out). Also check
that the equipment being connected to the hub is powered
on and operating correctly. Refer to Figure 6 below to
compare the wiring of a straight-through and a crossover
cable.
Figure 6
Straight-through Cable/Crossover Cable
Straight-through Crossover
1
TxD+
2
TxD-
3
RxD+
6
RxD-
Pins 4, 5, 7 and 8 are not used
TxD+
1
TxD-
2
RxD+
3
RxD-
6
1
TxD+
2
TxD-
3
RxD+
6
RxD-
Pins 4, 5, 7 and 8 are not used
TxD+
1
TxD-
2
RxD+
3
RxD-
6
16
THE O
FFICECONNECT ETHERNET
Ethernet Hub 8 and 8C—Front
HUB 8
AND
8C
Alert LED
orange
Alerts you to excessive
network use or an
isolated (partitioned)
10BASE-T port.
Activity
Alert
Power
Power LED
green
Indicates that the hub is
powered on.
Activity LED
(Hub 8 only)
yellow
Flashes each time a
packet is received
on a port.
Collision
12345678 1%2%3%6%12%25%50%80%
Collision LED
yellow
Flashes each time a collision is detected on the network.
Collisions are part of normal network operation.
Port Status LEDs
green/yellow
Indicates the status of each port.
green
— The link between the port and the next piece of network equipment is OK.
yellow
— The port has partitioned due to a fault on that segment.
off
— Nothing is connected to the port or the link has failed.
The 10BASE-2 port LED (Hub 8C only) can only be yellow or off. It is yellow if the port has partitioned.
Port Status
Green = OK, Yellow = Partitioned
Network Utilization
COAX
OfficeConnect Ethernet Hub 8C
Network Utilization LEDs (Hub 8C only)
green/yellow/orange
Indicates how much your network is being used.
17
Ethernet Hub 8 and 8C—Rear
10BASE-2 port (Hub 8C only)
Can be used to connect your hub to other OfficeConnect hubs
and equipment with 10BASE-2 cabling.
If used, it is effectively a ninth port.
Refer to “Connecting Hubs Using 10BASE-2” on page 20.
POWER COAX
Power Adapter socket
Only use the power adapter that is
supplied with this OfficeConnect
hub. Do not use any other adapter.
Uplink/Normal
Eight 10BASE-T RJ-45 ports
Use 10BASE-T cable with RJ-45 connectors. You can
connect the OfficeConnect hub to any workstation or
piece of equipment that has a 10BASE-T port. Port 8 can
be used to link to another OfficeConnect hub. Refer to
“Connecting Hubs Using 10BASE-T” on page 21.
8
Uplink/Normal switch
Affects the operation of port 8. For correct usage,
refer to “Connecting Hubs Using 10BASE-T” on page 21.
18
1x
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: Do not power the hub off and on quickly.
Wait about five seconds between power cycles.
Connect workstations and other equipment to any of the
hub’s 10BASE-T RJ-45 ports using 10BASE-T cables.
To connect a 10BASE-T cable, simply slot the connector into
the relevant RJ-45 port. When the connector is fully in, its
latch locks it into place. To disconnect the cable, push the
connector’s latch in and remove it.
If you are using port 8 to connect to a workstation
using a straight-through TP cable, ensure the
Uplink/Normal switch is set to Normal (out).
The hub detects all port connections, so you can start using
your network immediately. When you need more ports,
simply add more OfficeConnect hubs.
Connecting OfficeConnect Ethernet Hubs Together
You can increase the number of workstations that can
connect to your network by adding more OfficeConnect
hubs. You can use either 10BASE-T or 10BASE-2 (Hub 8C
only) to do this.
Do not connect the same two hubs together using
both 10BASE-T and 10BASE-2. This causes a network
loop.
If you do not use the 10BASE-2 port, you do not
need to connect a terminator (end piece) to it. If a
terminator is not used, the port partitions and the
10BASE-2 Port Status LED lights yellow. This is correct
operation.
19
Connecting Hubs Using 10BASE-2
Connect a 10BASE-2 ‘Y’ piece to each of your hubs
(Hub 8C only). Connect the ‘Y’ pieces with 10BASE-2 cable
to form a single segment, as shown in Figure 7. Remember
to terminate the two free ends of the segment by fitting
terminators (end pieces).
To disconnect a 10BASE-2 cable, twist each connector
counter-clockwise to unlock it, and remove it.
When using 10BASE-2 cable, it is important that both
ends of the segment are properly terminated with
50 Ohm terminators (end pieces).
Only use 50 Ohm 10BASE-2 cables and a ‘Y’ piece for
each hub. You can use ‘T’ pieces but ‘Y’ pieces
provide optimum clearance of the other ports.
Checking Connections
When you have connected your hubs, power them on.
The Port Status LEDs for the 10BASE-2 ports you have used
should be off. If they are not, check your connections.
Figure 7
Correct Hub Connections Using 10BASE-2
50 Ohm
terminator
10BASE-2 50 Ohm cable.
Minimum length of
each cable is 0.5m (1.6ft)
Maximum segment length is 185m (607ft)
(from terminator to terminator)
‘Y’ piece
50 Ohm
terminator
20
Connecting Hubs Using 10BASE-T
10BASE-T cable
with RJ-45 connectors.
Maximum length of
each cable is 100m (328ft)
Switch set to
Uplink (in)
Switch set to
Uplink (in)
Switch set to
Normal (out)
You can connect hubs together with 10BASE-T in a number
of ways, but for simplicity we recommend the following
method, as shown in Figure 8:
1
Starting from the bottom, connect the port 8 of the
lower hub to port 7 of the hub immediately above.
Repeat this for each hub.
2
Set all Uplink/Normal switches to Uplink (in) except for
the top hub (the one with port 8 not connected to
another hub). This unused port can be connected to a
workstation provided that the Uplink/Normal switch is set
to Normal (out).
Checking Connections
When you have connected your hubs, power them on.
The Port Status LEDs for the 10BASE-T ports you have used
should be green. If they are not, check your connections.
If the 10BASE-2 port is not used and is not terminated, the
LED should be yellow showing that it has partitioned. This is
correct operation.
Spot Checks
At frequent intervals, visually check that:
The Alert LED is not lit — this is the best way to find out
■
if there are problems with your network.
Case vents are not obstructed.
■
Cabling is secure and not pulled taut.
■
If you suspect there is a problem, refer to “Problem Solving
for the Hub 8 and 8C” on page 22.
Figure 8
21
Correct Hub Connections Using 10BASE-T
ROBLEM SOLVING FOR THE
P
HUB 8
AND
8C
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 equipment is powered on.
■
Power off the hubs, wait about 5 seconds and then
■
power on the hubs.
Check the following symptoms and solutions:
Power LED not lit.
If there is still no power, you may have a faulty power
adapter which needs replacing with another OfficeConnect
power adapter.
with the hub.
Alert LED continuously lit.
excessive use of your network (over 80%) or, more likely, a
10BASE-T port has partitioned due to a loop in your
network (in which case the corresponding Port Status LED
will be yellow). Examine your connections and remove the
Check your power adapter connection.
Do not use any other power adapter
There is either continual
loop. Each piece of equipment needs only one connection
to your OfficeConnect hub.
Port Status LED yellow for a 10BASE-T port.
that there is a loop in your network which has caused this
port to partition. Examine your connections and remove the
loop. Each piece of equipment needs only one connection
to your OfficeConnect hub. The LED will change from
yellow to green, on receiving a valid packet on the port.
Port Status LED yellow for the 10BASE-2 port when
the 10BASE-2 port is not being used.
partitioned. This is correct operation.
Link between two OfficeConnect hubs not working.
Check your hub connections; follow the information given
for your hub. With 10BASE-T it is likely an Uplink/Normal
switch is incorrectly set. With 10BASE-2 it is likely a
terminator (end piece) is not properly fitted; this would
cause the 10BASE-2 Port Status LED to light yellow
(partition).
The port has
It is likely
22
Port Status LED not lit for a 10BASE-T port that has a
connection.
There is a problem with this connection.
Check that you are using a straight-through 10BASE-T cable
which is properly connected at both ends, and is not
damaged. If the cable is connected to port 8, ensure that
the Uplink/Normal switch is set to Normal (out). Also check
that the equipment being connected to the hub is powered
on and operating correctly. Refer to Figure 9 below to
compare the wiring of a straight-through and a crossover
cable.
Figure 9
Normal
port
Rx+
Rx-
Tx+
Tx-
Straight-through Cable/Crossover Cable
Uplink
Pin Pin
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
port
Rx-
Rx+
Tx-
Tx+
Normal
port
Rx+
Rx-
Tx+
Tx-
Pin Pin
1
2
3
4
5
6
7
8
Normal
port
1
Rx+
2
Rx-
3
Tx+
4
5
6
Tx-
7
8
23
ETWORKING TERMINOLOGY
N
A
Network
IBM-compatible personal computers) and other equipment
(for example, printers), connected for the purpose of
exchanging information. Networks vary in size, some are
within a single room, others span continents.
A
Local Area Network (LAN)
office, that spans no more than a single site.
Ethernet
to pass information around the network.
10BASE-T
runs over
OfficeConnect hub uses
connecting your TP network.
10BASE-2
runs over 50 Ohm
A
Network Loop
equipment are connected by more than one path. Your hub
detects this and
break the loop.
is a collection of workstations (for example,
is a network, usually in an
is a type of LAN, referring to the technology used
is the name given to the Ethernet protocol that
Twisted Pair (TP)
is the name given to the Ethernet protocol that
Coaxial
occurs when two pieces of network
partitions
cable at 10Mbps. The
type connectors for
RJ-45
cable.
(isolates) one of its ports to
A
segment
port, whether this cable is 10BASE-T, 10BASE-2, or other
type. When you join equipment together with 10BASE-2
cable, via single speed hubs, the entire cable forms a single
segment.
Packets
other equipment send to each other over the network.
Collisions
occur if two or more devices (pieces of network equipment)
attempt to transmit at the same time. A sudden sustained
increase in the number of collisions can indicate a problem
with a device, particularly if it is not accompanied by a
general increase in traffic. On coaxial segments an increase
in collisions can also indicate faulty cabling.
An
AUI (Attachment Unit Interface)
type of port used to connect 10Mbps Ethernet transceivers
to network equipment (Hub 8C only).
is the length of Ethernet cable connected to a
are the units of information your workstations and
are a part of normal Ethernet operation and
port is a standard
24
IMENSIONS AND STANDARDS
D
Dimensions and Operating Conditions Standards
Functional: ISO 8802/3
0-40°C (32-105°F)
operating
temperature
0-90%
(non-condensing)
humidity
225mm (9in.)
35.8mm
(1.4in.)
135.4mm (5.3in.)
+ 15.2mm (0.6in.)
for 10BASE-2 port
(if applicable)
Safety: UL 1950, EN 60950
EMC: EN 55022 Class B
IEEE 802.3
CSA 22.2 #950
IEC 950
†
EN 50082-1
FCC Part 15 Class B
ICES-003 Class B
VCCI Class B
†
†
*
Power Weight
OfficeConnect Ethernet Hub 4 4 VA, 14 BThU/hr 500g (1.1 lb)
OfficeConnect Ethernet Hub 4C 12 VA, 40 BThU/hr 550g (1.2 lb)
OfficeConnect Ethernet Hub 8 11 VA, 38 BThU/hr 500g (1.1 lb)
OfficeConnect Ethernet Hub 8C 12 VA, 40 BThU/hr 550g (1.2 lb)
CNS 13438 Class A
Environmental: EN 60068 (IEC 68)
†
Category 5 screened cables must be used to ensure
compliance with the Class B requirements of this standard.
The use of unscreened cables (category 3 or category 5)
complies with the Class A requirements.
*Refer to “Electromagnetic Compatibility” on page 38 for
conditions of operation.†
25
NVIRONMENTAL STATEMENTS
E
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.
26
MPORTANT SAFETY INFORMATION
I
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 cord 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.
27
ICHTIGE SICHERHEITSHINWEISE
W
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.
28
ONSIGNES IMPORTANTES DE SÉCURITÉ
C
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.
29
ECHNICAL SUPPORT
T
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:// knowle dgeba se.3co m.co m
This service gives all 3Com customers and partners
complementary, round-the-clock access to technical
information on most 3Com products.
.
30
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.
■
31
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
Europe
From anywhere in Europe, call: +31 (0)30 6029900 phone
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
1 800 678 515
800 933 486
+61 2 9937 5085
001 800 61 009
0031 61 6439
1800 801 777
0800 446 398
+61 2 9937 5085
1235 61 266 2602
+31 (0)30 6029999 fax
0800 297468
0800 71429
800 17309
0800 113153
0800 917959
0800 1821502
00800 12813
1800 553117
1800 9453794
1678 79489
P. R. o f C h i n a
Singapore
S. Korea
From anywhere in S. Korea:
From Seoul:
Tai w an , R . O .C .
Thailand
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
10800 61 00137 or
021 6350 1590
800 6161 463
00798 611 2230
(0)2 3455 6455
0080 611 261
001 800 611 2000
0800 0227788
800 11376
00800 3111206
0800 831416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197
32
Country Telephone Number Country Telephone Number
Latin America
Argentina
Brazil
Chile
Colombia
AT&T +800 666 5065
0800 13 3266
1230 020 0645
98012 2127
Mexico
Peru
Puerto Rico
Venezuela
01 800 CARE (01 800
2273)
AT&T +800 666 5065
800 666 5065
AT&T +800 666 5065
North America
1 800 876-3266
33
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
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:
+ 31 30 6029900 + 31 30
6029999
Country Telephone Number Fax Number
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
U.S.A. and Canada 1 800 876 3266 1 408 326 7120
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
(not toll-free)
34
3Com Corporation Limited Warranty
3Com OfficeConnect Ethernet Hub 4, 4C, 8, 8C
The duration of the warranty for the OfficeConnect Ethernet Hub 4, 4C, 8, 8C
(3C16704A, 3C16703A, 3C16700A, 3C16701A) 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.
Y
2000 W
EAR
In addition to the Hardware Warranty and Software Warranty stated above,
3Com warrants that each product sold or licensed to Customer on and after
January 1, 1998 that is date sensitive will continue performing properly with
regard to such date data on and after January 1, 2000, provided that all other
products used by Customer in connection or combination with the 3Com
product, including hardware, software, and firmware, accurately exchange date
data with the 3Com product, with the exception of those products identified at
3Com’s Web site, http://www.3com.com/products/yr2000.html, as not meeting
this standard. If it appears that any product that is stated to meet this standard
does not perform properly with regard to such date data on and after January 1,
2000, and Customer notifies 3Com before the later of April 1, 2000, or ninety
(90) days after purchase of the product from 3Com or its authorized reseller,
3Com shall, at its option and expense, provide a software update which would
effect the proper performance of such product, repair such product, deliver to
Customer an equivalent product to replace such product, or if none of the
foregoing is feasible, refund to Customer the purchase price paid for such
product.
Any software update or replaced or repaired product will carry a Year 2000
Warranty for ninety (90) days after purchase or until April 1, 2000, whichever is
later.
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
ARRANTY
35
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 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.
36
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
(408) 326-5000
37
E
LECTROMAGNETIC COMPATIBILITY
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.
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.
VCCI S
TATEMENT
BCIQ S
TATEMENT
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.
38
Wall mounting screw hole guide
150 mm (5.9 in)
39
40
Part No. DUA 1670-0AAA04
Published June 1999
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