3Com IntelliJack NJ2000 Manuale utente

Quick Start Guide

3Com®IntelliJack®Gigabit Switch NJ2000

3CNJ2000

Part Number: 10016801 Rev AA

Published: May 2008

The 3Com®IntelliJack Gigabit Switch NJ2000 (3CNJ2000) is a 5-port, Web-

managed gigabit Ethernet switch that fits into most standard electrical wall

outlets or data port openings. The NJ2000 can also be mounted on the

desktop using the optional desk stand, 3CNJ1000STAND, as shown below.

Throughout this guide, the 3Com®IntelliJack Gigabit Switch NJ2000

(3CNJ2000) is referred to as the NJ2000. This Quick Start Guide describes the

basic steps necessary to install and configure your NJ2000.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may be

registered in other countries. 3Com, the 3Com logo, and IntelliJack are registered trademarks of 3Com

Corporation.

About This Guide

•Overview of the NJ2000 and Its Features

•NJ2000 Basics

•Observe All Safety Precautions

•Check the Shipment

•Register Your Product

•Telephone Technical Support and Repair

•Installation Overview

•1. Understand the Power Options

•2. Understand the PoE Capabilities for Port 1 and Port 2

•3. Plan the Installation

•4. Attach the Wall-Mount Bracket

•5. Set Up the Network Cabling

•6. Connect the NJ2000 to the Network

•7. Mount the NJ2000 to the Wall

•8. Connect the Local Power Supply (Optional)

•9. Connect Devices to the NJ2000

•10. Access the NJ2000 Web Interface

•11. Configure the NJ2000

•12. Download and Install the 3Detect Software (Optional)

•13. Troubleshooting: Check the LEDs

•Regulatory Statements

Overview of the NJ2000 and Its Features

The front of the NJ2000 has four gigabit LAN ports for local switching. The

gigabit LAN uplink port on the rear connects it to the rest of the network.

The NJ2000 brings gigabit switching capabilities to any single port on an

Ethernet network by allowing connections for up to four networking devices

such as computers, servers, access points, IP cameras, and Voice Over IP (VoIP)

telephones to the network through a single Ethernet connection.

All 5 LAN ports feature 10/100/1000 Mbps with auto-negotiation and auto

MDI-X. The NJ2000 also provides 2 pass-through ports that can be used to

connect 2 additional devices to separate network segments through the same

unit.

Power is provided to the NJ2000 either through the uplink port via 802.3at or

802.3af PoE (Power over Ethernet) or locally via an optional, external 48V DC

power supply, 3CNJ1000PSL.

NOTE: PoE, or Power Over Ethernet, is a method for providing power to

equipment over an Ethernet cable, allowing a device to receive both data and

power from the same network cable. PoE power may be provided on port 1 or

port 2 of the NJ2000 if there is sufficient power available to the system. See

the section “Understand the PoE Capabilities for Port 1 and Port 2” later in this

guide for details.

NJ2000 Basics

This diagram shows the front and side views of the NJ2000. The table

describes the features.

Feature Description

14 Gigabit LAN

switch ports

with LEDs

Allows you to connect up to four devices to the network.

A green LED indicates connection status when a device is using a

particular port.

Port 1 and port 2 are also power-forwarding ports; they can be used

with any standard networking device as well as to power any device

that requires IEEE 802.3af-compatible PoE.

An additional LED indicates when the port is forwarding power to a

device connected to that port.

2Two pass-through

ports The pass-through ports bypass the functionality of the switch and are

directly wired to the associated pass-through ports on the rear of the

unit. Pass-through ports allow connection to a separate network

segment or connection of an analog or digital PBX telephone.

3Power LEDs:

•DC

•PoE

Indicate whether the NJ2000 is being powered by a local power

supply (DC) or PoE.

This diagram shows the rear view of the NJ2000. The table describes the

features.

4Uplink LED Indicates network connection status for the uplink port on the rear of

the unit.

A green LED indicates a valid connection for the uplink port.

5Local Power Socket Can be used to power the NJ2000 with the optional local power

supply, 3CNJ1000PSL. NOTE: This power supply is required if the

local network does not supply Power over Ethernet.

6Locking screw hole Used to secure the NJ2000 to the wall-mount plate.

7Reset Button •Press and hold <20 seconds to reset the NJ2000

•Press and hold >20 seconds to erase the password and reset the unit to

factory defaults

Feature Description

1Two Pass-through

ports

The pass-through ports bypass the functionality of the switch and are

directly wired to the associated pass-through ports on the front of the

unit. Pass-through ports allow connection to a separate network

segment or connection of an analog or digital PBX telephone.

2Gigabit Ethernet

uplink port

Connects the NJ2000 to the network.

Observe All Safety Precautions

This equipment must be installed in compliance with local and national

building codes, regulatory restrictions, and FCC rules. See the section

“Regulatory Notices” at the end of this guide. For the safety of people and

equipment, only professional network personnel should install the NJ2000.

Check the Shipment

The NJ2000 is available in single- and 20-unit packs. Make sure that you have

the following items, which are included with each NJ2000:

•NJ2000

•Screw kit for wall mounting the NJ2000

•Male-to-male RJ-45 coupler cables (2 per NJ2000) for connecting the

Ethernet cable from the network to the NJ2000. NOTE: For use only if the

network cable is terminated with a female RJ-45 connector.

The following optional items may be useful, depending on your specific

installation requirements and the PoE capability of your network. If you

choose to use any of these items, be sure that they are on hand before

you begin the installation.

WARNING: To avoid possible injury or damage to equipment, you must

use power supply equipment that is safety certified according to UL, CSA,

IEC, or other applicable national or international safety requirements for

the country of use. All references to power supply in this document refer to

equipment meeting these requirements.

Part Number Description Purpose and 3C (Ordering) Numbers

3CNJ1000PSE Optional mid-span

power injector

For providing 802.3at PoE to an NJ1000 or NJ2000

3CNJ1000PSL Optional local power

supply

For locally powering a single NJ1000 or NJ2000

NOTE: This item is required if the network does not

support Power over Ethernet.

3CNJ1000STAND Optional desk stand For mounting the NJ1000 or NJ2000 on the desktop

To obtain telephone support as part of your warranty and other service

benefits, you must first register your product at:

http://eSupport.3com.com/

Telephone Technical Support and Repair

3Com offers telephone, e-mail, and Internet access to technical support and

repair services. To access these services for your region, use the appropriate

telephone number, URL or e-mail address from the following URL:

http://csoweb4.3com.com/contactus/

Installation Overview for the NJ2000

Detailed installation instructions are included in the sections that follow.

The following diagram displays an overview of the recommended installation.

In this example, the NJ2000 is being connected to an Ethernet network cable

that is terminated with a female RJ-45 connector.

1. Understand the Power Options

Power to the NJ2000 can be supplied in one of these ways:

•Through PoE (either 802.3at or 802.3af) applied to the uplink port

•Through the optional local external power supply

If power is supplied to the uplink port by 802.3at or by the external power

supply, then ports 1 and 2 may act as PoE PSE (Power Source Equipment) and

may also provide power to other devices plugged into those ports.

If power is supplied by 802.3af, then port 1 and 2 will not be able to supply

PoE power.

2. Understand the PoE Capabilities for Port 1 and Port 2

If power is supplied by 802.3at through the uplink port (PD) or if power is

supplied through the external power supply, then ports 1 and 2 may in turn

act as PoE PSE and may provide power.

If power is provided to the NJ2000 by the uplink port (PD) with 802.3at PoE or

with the external power supply, then the NJ2000 will have a total PoE PSE

budget of 15.4W, which can be divided between port 1 and port 2 based on

the class-based power management feature.

The NJ2000 can power these combinations of devices:

•One Class 0,3 PD device or

•Two Class 2 PD devices or

•Two Class 1 PD devices or

•One Class 1 PD device and One Class 2 PD device

CAUTION: You must use only a power supply that is provided or approved by

3Com for use with this NJ2000. Failure to comply with this requirement may

result in damage to the NJ2000, or may result in a hazardous situation or

personal injury.

3. Plan the Installation

When installed, the back of the NJ2000 extends into a wall for 0.5 inches.

Because the depth of some wall openings differs, observe the following

requirements and recommendations before you install the NJ2000:

•Make sure that the wall opening where the NJ2000 is being installed

complies with the NEMA-WD6 standard, as described in this diagram:

•Make sure that the distance between the back of the NJ2000 and the

inside of the wall is at least 1.5 inches (3 inches is recommended).

NOTE: If you are installing the NJ2000 into a wall junction box, make sure that

there is enough space between the back of the NJ2000 and the inside of the

junction box to maintain an acceptable bend radius on the cable.

•To ensure proper horizontal cabling functionality, adhere to the following

network cabling standards during installation:

•ANSI/TIA/EIA-568

Commercial Building Telecommunications Cabling Standard

•ANSI/TIA/EIA-569

Commercial Building Standard for Telecommunications Pathways and

Spaces

4. Attach the Wall-Mount Bracket

Attach the included wall-mount bracket to the wall opening as shown in this

diagram.

5. Set Up the Network Cabling

The network cabling (from the wiring closet to the wall opening) may already

be installed. If it is not, install the cabling following these general guidelines.

CAUTION: 3Com recommends that a professional cable installer perform

these procedures. Be sure to adhere to local safety and regulatory codes

during the cable installation.

1Connect one end of an Ethernet cable to the network. Usually, this

connection is made in a network wiring closet, via the patch panel.

2Terminate the other end of the cable at the location where the NJ2000 is

being installed (using either a female or male RJ-45 connector). Refer to

the connector manufacturer's instructions for terminating the cable. Be

sure to test the connector and verify that it is working.

6. Connect the NJ2000 to the Network

The method for connecting the NJ2000 to the network is determined by how

the network cable is terminated, as described in step 5.

•If the end of the cable is terminated with a female RJ-45 connector, use

one of the RJ-45 coupler cables included in the NJ2000 package to

connect the NJ2000 to the network cable.

•If the end of the cable is terminated with a male connector, connect the

network cable directly into the Ethernet uplink port.

7. Mount the NJ2000 to the Wall

After you connect the NJ2000 to the network, follow these steps, as shown in

the next figure:

1Mount the NJ2000 to the wall-mount bracket.

CAUTION: Make sure that the vents along the edges of the NJ2000 faceplate

are clear of any obstructions to allow airflow to vents.

2Slide the NJ2000 onto the wall-mount bracket, ensuring that the 4 hooks

on the bracket fit into the 4 slots on the back of the NJ2000.

3Pull the NJ2000 down to lock the hooks tightly into the slots. Be sure to

match the screwholes in the bracket and the NJ2000. Secure the NJ2000

using the T-10 torx screw that came in the NJ2000 package

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