3Com 3CNJ205 Manuale utente

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.

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

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

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

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

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

About the NJ205 IntelliJack

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

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

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).

Pass-through

LAN cableConnects your pass-through port directly

to the Ethernet LAN. No LED

(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)

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