3Com 3CNJ205 User manual

NJ205 IntelliJack
3CNJ205
4-port 10/100 Mbps Managed
Ethernet Switch
http://www.3com.com/
http://www.3com.com/productreg
Published July 2003
User guide version 1.0
User Guide

3Com Corporation n5500 Great America Pkwy n
Santa Clara, California n95052-8145 nU.S.A.
Copyright © 2003 3Com Corporation. 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 Corporation.
U.S. patents: 5,994,998; 6,140,911; 6,329,906; 6,496,105; 6,535,9836,
483,203; 6,449,348; 6,212,195
3Com Corporation reserves the right to revise this documentation and to make
changes in content from time to time without obligation on the part of 3Com
Corporation to provide notification of such revision or change.
3Com Corporation 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 the 3Com logo are registered trademarks of 3Com Corporation. All
other company and product names may be trademarks of the respective
companies with which they are associated.

About the NJ205 IntelliJack 1
Package Contents 3
NJ205 Description 5
Installing the IntelliJack 7
Setting up the Power Supply 7
Mounting the IntelliJack 8
Connecting Devices to the IntelliJack 10
Checking the LEDs 11
Installing the Configuration Managers 13
System Requirements 14
Installing the Local and Central Configuration
Managers 14
Using the Local Configuration Manager 21
Initializing the NJ205 IntelliJack 21
Setting Advanced Options 25
Discovering NJ205 Devices on Your Network 27
Using the Central Configuration Manager 27
Viewing Device Properties 33
Changing Device Configuration 39
Finding Computers Connected to NJ205 Devices 49
Upgrading the NJ205 Firmware 51
Contents

Contents
Specifications 57
Default Settings 61
Optional Components 63
Power Supplies and IP Phone Power Module 63
Mounting Plates and Spacers 64
Power Options 65
Using an Integrated Switch with Power Over Ethernet 66
Using Ethernet Multi-port Midspan Power Supply 67
Using a Single-port Ethernet Power Supply 69
Using the 3Com Local Power Supply 70
Installation Planning 73
Troubleshooting 75
Troubleshooting Matrix 76
One-Year Free Installation Support 79
Online Technical Services 79
Technical Support 79
Support from Your Network Supplier 81
Support from 3Com 82
Returning Products for Repair 82
3Com Corporation Limited Warranty 83
Limited Warranty and Regulatory Compliance
Information

1
The 3Com NJ205 is part of the IntelliJack family of products that
provides connectivity at the edge of the network infrastructure.
The NJ205 IntelliJack is a 4-port, un-managed Fast Ethernet
switch that fits into most standard data port openings.
The NJ205 IntelliJack quadruples port connections where a single
port (and cable) already exists in the wall. Expanding port
connections with the 3Com IntelliJack is a less expensive and less
disruptive alternative to running additional cabling. Also, the
3Com IntelliJack is installed in the wall, making it more secure
and out of the way than deploying a remote desktop switch.
The NJ205 IntelliJack allows up to four networking devices, such
as computers, printers, Voice over IP (VoIP) telephones, and
scanners, to be connected to the network via its own Ethernet
port. A pass-through port is provided that allows an additional
device to be connected to a separate network segment through
the same IntelliJack.
All ports feature 10/100 Mbps auto-negotiation, which
configures the NJ205 IntelliJack for 10 Mbps or 100 Mbps
connections automatically.
The NJ205 needs no software to operate and no configuration.
However, to modify the default configuration and utilize the
advanced feature we have provided a configuration manager
software suite on compact disk.
1AbouttheNJ205IntelliJack

About the NJ205 IntelliJack
2
You can manage the NJ205 IntelliJack using the included
Central Configuration Manager. You can also use a supported
SNMP management console as you would with any managed
device on your network, but greater management and control is
available through the Configuration Manager software.
Management features include:
■Device discovery
■Port status (state, duplex, speed)
■Statistics
■Port control (port state, flow control, AutoMDI(X),
multicast limit)
■QoS/Priority
■Port-based VLAN
■VLAN tag add/remove
■Firmware upgrade
Before you begin installation, register your product at:
www.3com.com/support.

Package Contents
3
Package Contents
The NJ205 IntelliJack is available in single- and 20-packs. Before
installation, familiarize yourself with the following items, which
are included with the NJ205:
1NJ205 IntelliJack.
2Four pairsof M3.5mm screws (two per IntelliJack) for
mounting the IntelliJack to the wall, floor box or office cubicle.
3Mounting plate (face plate).
1234
3
1
2

About the NJ205 IntelliJack
4
Additionally, the following items are shipped with the single
pack:
■Compact disc containing
■User Guide and additional informational documents.
■Configuration Manager software.
All screws are phillips pan head type screws. The type of threads
vary to match the different mounting locations compatible with
the IntelliJack.
■Thread forming screws for mounting into plastic:
■M3 x 30mm (2x)
■M3 x 40mm (2x)
■Machine screws for mounting into metal:
■M3.5 x 50mm (2x)
■M3.5 x 740mm (2x)
For moreinformation on optional components, see Appendix C,
“Optional Components”.

NJ205 Description
5
NJ205 Description
The following diagram shows the front, rear and bottom views
of the IntelliJack:
1RJ-45 switched
PAN (personal
area network)
ports
Four 10/100 Mbps auto-negotiation ports,
which the NJ205 configures for 10 Mbps or
100 Mbps connections automatically (green
LEDs).
2Port LEDs and
corresponding
port numbers
Indicate network status of each of the four
RJ-45 PAN ports.
3RJ-45 LED Indicates the status of the LAN connection
(white cable, green LED). For more
information, see “Checking the LEDs” on
page 11.

Abo utthe NJ 205 IntelliJack
6
4Power LED Indicates NJ205 p ower status (gr een). For
more information, see “Checking the LEDs”
on page 11.
5Pass-through
port
6Power-
forwarding LED
Lights when the IntelliJack is connected to
and forwar dingpower to an IEEE802.3af
compliant device. For more information, see
“Chec king the LEDs” on page 11.
7Local power
supply cable
strain relief
Local power supply cable strain relief.
8Power Socket The NJ205 can be powered from a local
power supply (available for purchase from
3Com). This is requiredif your network does
not support Power over Ethernet (PoE).
9
Pass-through
LAN cableConnects your pass-through port directly to the Ethernet LAN. No LED
10
(Black)
Provides an independent connection to your
LANthatpasses throughthe NJ205IntelliJack.
The data or voice traffic is separate from and
unaffected by the NJ205 switch.
Main Unit Connects the NJ2 05 switched RJ-45 ports to
the Ethernet LAN. Make sure the port on the
network switch to which the NJ205 is
connected is configured as a standard MDI-X
port.
LAN cable
(white)

7
Installing the NJ205 IntelliJack consists of the following steps:
1Set up the power supply.
2Mount the NJ205 to the wall outlet box.
3Connect devices to the NJ205.
4Check the NJ205 LEDs.
Setting up the Power Supply
Power to the IntelliJack is provided through one of the following
methods:
■Over the network via an integrated switch that supports
Power Over Ethernet.
■Over the network via an Ethernet multi-port endspan power
supply.
■Over the network via a single-port Ethernet power supply.
■Locally via a 3Com local power supply.
NOTE: Power Over Ethernet, also known as in-line
power, is a method to provide power to equipment over
an Ethernet cable, allowing a device to receive both data
and power from the same network cable. The NJ205 is
ideally powered by a switch that is IEEE 802.3af-
compliant. The NJ205 can also be powered by some
switches that are not 802.3af-compliant. Consult the
3Com web site for more information.
2Installing the IntelliJack

Installing the IntelliJack
8
Before you begin installation, determine which type of power
supply the IntelliJack will use. For more information on power
options and configuration,see Appendix D, “Power Options”.
Mounting the IntelliJack
The IntelliJack mounts in any standard British Standard Institute
(BSI): BS 4664:1970 (1986) single cubicle opening or wall outlet.

M ounting the IntelliJack
9
Before connecting the IntelliJack to the network, verify that the
existing network cabling meets the ANSI/TIA/EIA-568 standard
and that the port in the wiring closet is connected to an active
Ethernet MDI-X port.
1Thread both IntelliJack LAN cables through the opening in
the mounting plate.
2Connectthe wiring asillustratedon page 8.
The IntelliJack has two Ethernet cables each terminated
with a male RJ-45 connector.
The white cable connects the LAN to the four personal
area network (PAN) ports located on the bottom of the
IntelliJack.
The black cable connects the LAN to the single pass-
through port located on the front of the IntelliJack.
3Choose one pair of the provided screws that best fits your
outlet box.
4Tighten the screws while holding the IntelliJack in place.
NOTE: The IntelliJack is designed to be mounted
using the provided mounting plate or many after-
market faceplates. However, some after-market
faceplates stand out from the wall and do not
provide a secure mounting surface for the IntelliJack.
In such cases it is recommended to place the 3Com
spacer between the IntelliJack and the after-market
face plate. For more information on the different
mounting plates and spacers, see Appendix B.

Installing the IntelliJack
10
Connecting Devices to the IntelliJack
Oncethepower sourceand the datasourcehavebeen verified in
goodworkingorderand the IntelliJackhasbeen installedand
mounted, connect your networking devices (such as computers,
printers, IP phones, cameras, etc.) to the IntelliJack.
TheIntelliJackhastwowaystoconnectdevices:
1RJ-45 Personal Area Network (PAN) Ports — any of the four
switched ports on the bottom of the IntelliJack. All ports feature
10/100Mbpsauto-negotiation,whichconfigures theNJ205
IntelliJack for 10 Mbps or 100 Mbps connections automatically.
2Pass-through port—a single pass-through port is provided
thatallowsanadditionaldevice tobeconnectedtoa
separate network segment through the same IntelliJack. The
data or voice traffic that travels through the pass-through
port, passes through the IntelliJack without being switched.
1234

Checking the LEDs
11
Checking the LEDs
You can verify the IntelliJack installation by checking the LEDs.
LED Description
(LAN)
On—the IntelliJack is connected to the network
and a link has been established.
Off—there is no connection to the network.
(Power)
On—the IntelliJack is receiving power (local or
via the network). When you first connect power
to the IntelliJack, there is a delay of
approximately 5 seconds. The power LED light
blinks once or twice before remaining solid on.
Off—the IntelliJack is not receiving power.
(Power-
forwarding)
On—the IntelliJack is connected to and is
forwarding power to an IEEE 802.3af-compliant
device.
Off—the IntelliJack is not connected to or is not
forwarding power to an IEEE 802.3af-compliant
device.
CA UTION: Make sure the wiring closet port
connected to the IntelliJack white cable is
configured as a standard MDI-X port.

Installing the IntelliJack
12

13
Once you have installed the NJ205 hardware, you need to
configure it for use on your particular network. To configure the
NJ205, install the Local and Central Configuration Managers.
NOTE: You will use the Local Configuration
Manager for initial configuration of the NJ205
on your network. It is usually easiest if you load
this software on a laptop and use it to configure
NJ205 devices as you install them.
The NJ205 Central Configuration Manager is
used for advanced configuration and
management of one or more NJ205 devices on
your network. This software should be installed
on the machine you plan to use to manage your
NJ205 devices from a remote location—perhaps
the same console you use for SNMP
management.
3Installing the
Configuration Managers

Installing the Configuration Managers
14
System Requirements
The machine you install the software on should meet the
following requirements:
■Pentium processor
■Minimum of 15MB disk space
■Windows 2000 or Windows NT 4.0 with Service Pack 6
installed (Windows 95 and Windows 98 are not
recommended operating systems for use with management
platforms. In most cases, the Configuration Manager
software will work with Windows 95, 98, or XP. However,
please check 3Com’s web site for additional information
regarding XP support)
Installing the Local and Central Configuration
Managers
To install the Configuration Manager software:
1Insert the Configuration Manager software CD into your
Windows 2000 or Windows NT computer.
2If your computer is configured to Auto-Play CDs, the
installation will start automatically. If not, double-click the
setup.exe icon on the CD, and you will see this window:

Installing the Local and Central Configuration Managers
15
3Click Next to continue.
4Carefully read the license agreement. If you agree, click
“Yes, I accept” and Next to continue.
5Enter your user and organization names and click Next.

Installing the Configuration Managers
16
6The program files will be installed in the directory
C:\Program Files\3Com\IntelliJack. If you want to change
the location of the installation, click Change. Otherwise
click Next to accept the default location and continue.