3Com NJ90 Network Jack Manuale utente

NJ90

Network Jack

User Guide

3CNJ90

User Guide

NJ90 Network Jack

3CNJ90

4-port 10/100 Mbps Unmanaged

Ethernet Switch

http://www.3com.com/

http://www.3com.com/productreg

150000038600A R01

Published February 2003

3Com Corporation 5500 Great America Parkway

Santa Clara, California 95052-8145 U.S.A.

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.

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 condi-

tions of merchantability, satisfactory quality, and fitness for a particu-

lar 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 docu-

mentation, 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 “Com-

mercial 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 con-

junction 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 coun-

tries.

3Com and the 3Com logo are registered trademarks of 3Com Corpora-

tion. All other company and product names may be trademarks of the

respective companies with which they are associated.

Table of Contents

Contents

1. NJ90 Package Contents 1

2. NJ90 Description 2

3. NJ90 Installation 3

Appendix

A: NJ90 Specifications 5

B: Wall Outlet Dimensions 7

C: Setting up the Power Supply 8

D: Setting up the Network Cabling at Your Site 12

E: Troubleshooting the NJ90 13

F: Contacting Technical Support 14

Limited Warranty & Regulatory Compliance Information 17

List of Illustrations

Fig.1 NJ90 Feature Description 2

Fig.2 NJ90 Installation 3

Fig.3 NJ90 Dimensions 5

Fig.4 Wall Outlet (NEMA-WD6) Dimensions 7

Fig.5 Using an Integrated Switch with Power over Ethernet 8

Fig.6 Using a Multi-port Ethernet Power Supply 9

Fig.7 Using a Single-port Ethernet Power Supply 10

Fig.8 Using the 3Com Local Power Supply 10

NJ90 User Guide

The 3Com Network Jack is a platform that provides connectivity at

the edge of the network infrastructure. The NJ90 Network Jack, is a

member of this family of products.

The NJ90 Network Jack is a 4-port, un-managed Fast Ethernet switch

that fits into most standard data port openings.

The NJ90 Network Jack quadruples port connections where a single

port (and cable) already exists in the wall. Expanding port connec-

tions with the 3Com Network Jack is a less expensive and less dis-

ruptive alternative to running additional cabling. Also, the 3Com

Network Jack is installed in the wall, making it more secure and out

of the way than deploying a remote desktop switch.

The NJ90 Network Jack allows up to four networking devices, such as

computers, printers, Voice over IP (VoIP) telephones, and scanners,

each to be connected to the network via its own Ethernet port.

The NJ90 needs no software to operate and no configuration. All

ports feature 10/100 Mbps auto-negotiation, which configures the

NJ90 Network Jack for 10 Mbps or 100 Mbps connections automati-

cally.

Before you begin installation, register your product at:

www.3com.com/support

1. NJ90 Package Contents

- Single Pack & Multi Pack

The NJ90 Network Jack is available in single and 20-packs. Before

you begin the installation, make sure you familiarize yourself with

the following items, which are included with the NJ90:

•NJ90Unit

• 6x32 screws (2 per NJ90) for mounting the NJ90 to the wall or

office cubicle

• RJ-45 Male-to-Male coupler cable (1 per NJ90) for connecting

the NJ90 unit to the Network Ethernet cable (required only in

case your network cable is terminated with a female RJ-45 con-

nector)

• User Guide (1 per package)

Installation Guide

2. NJ90 Description

The following diagram shows the front view and the rear view of the

NJ90 (see descriptions below)

Figure 1 - NJ90 Feature Description

1 Four Switching Ports Allow up to four devices to be

connected to the network.

2 LED’s Indicates network connection

and activity status.

Indicates NJ90 power status.

3 Uplink Port Connects NJ90 to the Network cable

4 Hook Secure the Coupler Cable with a tie-

wrap

5 Power socket NJ90 can be powered from a local

power supply (available for purchase

separately from 3Com)

6 Strain Relief Channel Strain Relief Channel for the Local

Power Cord

3. NJ90 Installation

3.1 Install the NJ90 Network Jack.

3.2 Set up the power supply

3.1 - Install the NJ90 Network Jack

Figure 2 - NJ90 Installation

Step 1:

If the end of the network cable from the wiring closet is terminated

with a female RJ-45 connector, use the RJ-45 coupler cable included

in the package to connect the Network jack to the network cable

(recommended installation).

If the end of the network cable from the wiring closet is terminated

with a male RJ-45 connector, connect the network cable directly into

the NJ90 uplink port.

Step 2: (Optional)

Thread a tie-wrap around the hook at the back and secure the RJ-45

coupler cable/Network cable.

Wall

To wiring

closet

Network

cable

Network

cable

To wiring

closet

Wall

RJ-45

coupler cable

Installation Guide

Step 3:

Mount the NJ90 Unit to the Wall or Cubicle Outlet with the screws

provided.

3.2 - Set up the power supply :

Selecting the power scheme and installing it:

See Appendix C: Setting up the Power Supply (p.8).

You can verify the NJ90 Network Jack Installation by checking the

LED’s.

LED Description

(Lan)

•On - The NJ90 is connected to the network and a

link has been established.

•Blinking - Network Activity.

•Off - There is no connection to the network.

(Power)

•On - The NJ90 is receiving power (local or via the

network).

•Off - The NJ90 is not receiving power.

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