3Com 3CNJ100 - IntelliJack Switch Manuale utente

NJ100 Network Jack

3CNJ100

4-port 10/100 Mbps Unmanaged

Ethernet Switch

Installation Guide

http://www.3com.com/

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

09-2141-000

Published September 2001

3Com Corporation

■

5400 Bayfront Plaza

Santa Clara, California

■

95052-8145

■

U.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.

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 is a registered trademark and the 3Com logo is a trademark of

3Com Corporation. All other company and product names may be trademarks

of the respective companies with which they are associated.

About the Network Jack 2

Before You Begin 6

Obtaining Optional Components 7

Installing the Network Jack 8

Setting up the Power Supply 10

Using an Integrated Switch with Power Over

Ethernet 10

Using a Multi-port Ethernet Power Supply 10

Using a Single-port Ethernet Power Supply 12

Using the 3Com Local Power Supply 12

Setting the Power Over Ethernet Dip Switches 13

Installing the Adapter Plate and Pass-Through Ports 15

Planning the Installation 17

Setting up the Network Cabling at Your Site 19

Connecting the Network Jack to the Network 19

Mounting the Network Jack 22

Connecting the Local Power Supply (Optional) 23

Connecting Devices to the Network Jack 23

Checking the LEDs 24

Troubleshooting the Network Jack 24

Specifications 26

Contents

Contacting Technical Support 28

One-Year Free Installation Support 28

Online Technical Services 29

World Wide Web Site 29

3Com Knowledgebase Web Services 29

3Com FTP Site 30

Support from Your Network Supplier 30

Support from 3Com 31

Returning Products for Repair 31

3Com Corporation Limited Warranty 33

FCC Class A Verification Statement 37

FCC Declaration of Conformity 37

The 3Com Network Jack is a 4-port, unmanaged Ethernet switch

that ﬁts into any standard electrical wall outlet or data port

opening.

The Network Jack brings switching capabilities to any single port

on an Ethernet network by allowing up to four networking

devices, such as computers, printers, Voice Over IP (VoIP)

telephones, and scanners, to be connected to the network via

one Ethernet port. Optional connectors are also available that

allow up to two additional devices to be connected to separate

network segments through the same Network Jack.

The Network Jack needs no software to operate and little or no

conﬁguration. All ports feature 10/100 Mbps auto-negotiation,

which conﬁgures the Network Jack for 10 Mbps or 100 Mbps

connections automatically.

Power to the Network Jack can be provided one of the following ways:

■

Over the network via an integrated switch that supports

Power Over Ethernet; speciﬁcally, a switch that is compatible

with Capacitive Power Discovery Process (24V or 48V) or IEEE

802.3af-compatible Power Over Ethernet. Power Over

Ethernet, also known as in-line power, is a feature that

provides power onto an Ethernet cable, allowing a device to

receive both data and power from the same network cable.

■

Over the network via an optional single-port or multi-port

Ethernet power supply. See “Setting up the Power Supply”

on page 10 for more information.

■

Locally via an optional local power supply. See “Using the

3Com Local Power Supply” on page 12 for more information.

Installation Guide

About the Network Jack

The following diagram shows the front view of the Network Jack.

About the Network Jack

1 Switched ports Allow up to four devices to be connected to

the network.

Port number 1 is also a power-forwarding port;

it can be used with any standard networking

device as well as to power a VoIP telephone on

a network that uses IEEE 802.3af-compatible

Power Over Ethernet.

2 Slot for adapter

plate

Can be ﬁtted with an adapter plate, which

can be installed with up to two pass-through

ports.

3 Adapter plate

with installed

pass-through

port connector

Can be used for voice or other networking

applications. The port bypasses the

functionality of the switch, allowing you to

set up a connection to a separate network

segment or to connect to an analog or digital

PBX telephone.

The adapter plates are available from 3Com.

However, you must purchase the connectors

from the manufacturer. See “Installing the

Adapter Plate and Pass-Through Ports” on

page 15 for more information.

4 LEDs

5 Power socket Can be used to power the Network Jack with

a local power supply (available for purchase

from 3Com); required if your network does

not support Power Over Ethernet.

Indicates network connection status.

Indicates power status.

Installation Guide

The following diagram shows the back view of the Network Jack.

CUS

NetworkInterfaceNode

Model3C3000

ASSEMBLEDINU.S.A.

TestedtoComply

with FCCStandards

About the Network Jack

1 Ethernet uplink

port

Connects the Network Jack to the network.

Make sure the port on the network switch

to which the Network Jack is connected is

configured as a standard MDI-X port.

2 Slot for adapter

plate

Can be ﬁtted with an adapter plate, which can

be installed with up to two pass-through ports.

3 Adapter plate

with installed

pass-through

port connector

Connects the installed pass-through port to

the network.

4 Dip switches Determine the type of Power Over Ethernet

(Capacitive Power Discovery Process 24V or

48V or IEEE 802.3af) the Network Jack uses.

Setting the dip switches is required only if your

network supports Power Over Ethernet, or if

you are using a multi-port Ethernet power

supply. See “Setting the Power Over Ethernet

Dip Switches” on page 13 for instructions.

Installation Guide

Before You Begin

Before you begin installation, register your product at:

www.3com.com/productreg.

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

begin the installation, make sure you have the following items,

which are included with the Network Jack:

■

6x32 screws (2 per Network Jack) for mounting the

Network Jack to the wall or ofﬁce cubicle.

■

RJ-45 coupler cable (1 per Network Jack) for connecting

the Ethernet cable from the network to the Network Jack

(required only if your network cable is terminated with a

female RJ-45 connector).

■

Installation guide (1 per package).

Additionally, the following items are shipped with the single pack:

■

Adapter plates for installing connectors to use as pass-

through ports. The adapter plates accommodate connectors

from suppliers including:

■

Panduit (RJ-45 and RJ-11)

■

Avaya (RJ-45 and RJ-11)

■

Adapter plate screws (2) for mounting the adapter plate to

the Network Jack.

NOTE:

The connectors for the adapter plates must be

purchased from the manufacturer. For a list of supported

connectors, go to www.3com.com/.

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