3com 3C10220 Manuel utilisateur

http://www.3com.com/

3Com

®

Ethernet Power Source

Guide

3C10220 - 12-Port Ethernet Power Source

3C10222 - 24-Port Ethernet Power Source

Part Number: 10038538-01 Rev B

Published: November 2000

3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

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 hardcopy 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, the 3Com logo, AirConnect, and NBX are registered trademarks of 3Com Corporation.

All other company and product names may be trademarks of the respective companies with which they are

associated.

CONTENTS

ABOUT THIS GUIDE

Conventions 5

Documentation Comments 6

Year 2000 Compliance 6

3Com Support 7

1 3COM ETHERNET POWER SOURCE OVERVIEW

Overview 10

Features 10

Front Panel Connections and LEDs 11

10/100BASE-TX Data Input Ports 11

10/100BASE-TX Data and Power Output Ports 12

LEDs 12

Rear Panel Connections 14

Information Label 14

Console Port 14

DC Power Socket 15

AC Power Socket 15

Guidelines for Network Configuration 15

2 INSTALLING THE ETHERNET POWER SOURCE AND END DEVICES

Choosing a Suitable Site 20

Rack-mounting the EPS 21

Power-up Sequence 22

Adding Power 22

Verifying Correct Operation 22

Selecting the Correct Cables 22

Power Splitter Cable 24

Connecting an NBX Business Telephone 24

Connecting a 3Com Wireless Access Point 25

3 TROUBLESHOOTING

Solving EPS Problems 27

Solving NBX Telephone Problems 30

Solving Wireless Access Point Problems 32

A SAFETY INFORMATION

Important Safety Information 36

L’information de Sécurité Importante 37

Wichtige Sicherheitsinformationen 39

B TECHNICAL SPECIFICATIONS AND PIN ASSIGNMENTS

3COM CORPORATION LIMITED WARRANTY

ABOUT THIS GUIDE

This guide provides all the information that you need to install and use

either of the Ethernet Power Source (EPS) units:

■ 3C10220 — with 12 10BASE-T/100BASE-TX ports

■ 3C10222 — with 24 10BASE-T/100BASE-TX ports

The guide is intended for use by installers or network administrators who

are responsible for installing and setting up network equipment. It

assumes a basic working knowledge of LANs.

Conventions Table 1 and Table 2 list conventions that are used throughout this guide.

Table 1 Notice Icons

Icon Notice Type Description

Information note Information that describes important features or

instructions

Caution Information that alerts you to potential loss of data or

potential damage to an application, system, network,

or device

Warning Information that alerts you to potential personal injury

6 ABOUT THIS GUIDE

Documentation

Comments

Your suggestions are very important to us. They will help make our

documentation more useful for you. Please e-mail comments about this

guide to us at this address:

NBX_TechPubs_Comments@3com.com

Please include the following information when you comment:

■ 3Com

®

Ethernet Power Source Guide

■ Part Number 10038538-01 Rev B

■ Page number

Year 2000

Compliance

For information on Year 2000 compliance and 3Com products, visit the

3Com Year 2000 Web page:

http://www.3com.com/products/yr2000.html

Table 2 Text Conventions

Convention

Description

Screen displays This typeface represents information as it appears on the

screen.

Commands The word “command” means that you must enter the

command exactly as shown and then press Return or Enter.

Commands appear in bold.

The words “enter”

and “type”

When you see the word “enter” in this guide, you must type

something, and then press Return or Enter. Do not press

Return or Enter when an instruction simply says “type.”

Keyboard key names If you must press two or more keys simultaneously, the key

names are linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

Words in italics Italics are used in this guide to:

■ Emphasize a point. For example: Do not run with scissors.

■ Denote a new term at the place where it is defined in the

text.

■ Identify menu names, menu commands, and software

button names. Examples:

From the Help menu, select Contents.

Click OK.

3Com Support 7

3Com Support For information about these topics:

■ Product Troubleshooting

■ Software Downloads

■ Documentation

■ 3Com Service

use your web browser to access this web site:

http://support.3com.com/

and look for Network Telephony Products.

8 ABOUT THIS GUIDE

1

3COM ETHERNET POWER SOURCE

OVERVIEW

The 3Com Ethernet Power Source (EPS) provides power, over existing

Ethernet wiring, to devices such as NBX telephones and 3Com wireless

access points. The EPS can determine whether an Ethernet device can

accept power over the Ethernet cable, and supply power only to those

devices capable of accepting it.

The EPS:

■ Eliminates the need for AC outlets, Uninterrupted Power Supplies

(UPS), and AC/DC adapters

■ Can be used with the 3Com NBX 100 Communications System

business telephones and with 3Com’s wireless access points.

■ Is easy to add to your network

■ Allows you to manage power centrally

This chapter covers these topics:

■ Overview of the Ethernet Power Source

■ Front Panel Connections and LEDs

■ Rear Panel Connections

■ Guidelines for Network Configuration

10 CHAPTER 1: 3COM ETHERNET POWER SOURCE OVERVIEW

Overview The power source is designed for use with a standard

10BASE-T/100BASE-TX Ethernet network over standard TIA/EIA-568,

Category 5 cable. The DC operating power for the data terminal units is

fed through the unused pairs (7/8) and (4/5).

You can order the EPS in either of these models:

■ 12 Ethernet ports

■ 24 Ethernet ports

Features The EPS has the following hardware features:

■ Remote power feeding of Ethernet terminals

■ 12 or 24 ports of combined 10BASE-T/100 BASE-TX data and power

■ Shielded RJ-45 input/output connectors

■ Universal 85-264VAC 50/60Hz input

■ Power feeding over 7/8 and 4/5 spare twisted pairs of Category 5

UTP/STP cable

■ Independent overload and short-circuit protection for each port

■ Port status LED indicators

■ Power on/off command for each port

■ RS-232 monitoring and control serial port

■ FLASH memory for field firmware upgrades

■ Standard 19” 1.5U rack mounting with hardware

■ –24 VDC connector for an external DC power supply

Front Panel Connections and LEDs 11

Front Panel

Connections and

LEDs

Figure 1 and Figure 2 show the front-panel details of the 24-port and

12-port EPS units. The LEDs are described in later in this section.

Figure 1 24-Port Ethernet Power Source — Front View

Figure 2 12-Port Ethernet Power Source — Front View

Both the 12-port (P/N 3C10220) and the 24-port (P/N 3C10222) versions

of the EPS have two rows of 10BASE-T/100BASE-TX ports. The input

ports, on the bottom row, are numbered from left to right (as you face

the front of the unit). Each output port is located immediately above the

input port to which it corresponds. You must use non crossover cables

with both input and output ports.

10/100BASE-TX

Data Input Ports

The EPS input ports (bottom row) accept Ethernet data only (Tx/Rx) over

the standard two wire pairs on an RJ-45 connector (Transmit on pins 1

and 2; Receive on pins 3 and 6).

Note: Bottom row connectors are input ports (data only).

Top row connectors are output ports (data and power).

Note: Bottom row connectors are input ports (data only).

Top row connectors are output ports (data and power).

12 CHAPTER 1: 3COM ETHERNET POWER SOURCE OVERVIEW

10/100BASE-TX

Data and Power

Output Ports

The EPS output ports (top row) carry two kinds of transmissions:

■ Ethernet data on the standard two wire pairs on an RJ-45 connector

(Transmit on pins 1 and 2; Receive on pins 3 and 6)

and

■ DC power on the previously unused wire pairs of the RJ-45 connector

(-24VDC Return on pins 4 and 5 and -24VDC on pins 7 and 8)

The maximum segment length from the switch or hub to the Network

Interface Card (NIC), including the EPS, is 100 m (328 ft.) using

Category 5 twisted pair cable.

LEDs lists the lights (LEDs) on the front of the EPS and their states. For

information on using the LEDs for problem solving, see “Solving EPS

Problems” in Chapter 3.

Table 3 LED Behavior

Per-port Status Indications

Visual Indications (for Each Port) Port Status

Yellow LED Green LED Note: Do not automatically assume that a

yellow LED indicates a problem. For example, if

the yellow LED for any port is ON, the EPS is

not supplying power to that port/device, which

may indicate that the device is not capable of

accepting power via its Ethernet connection.

Off On ■ Normal condition. Port power is turned on

and a device is drawing power from the

port.

Off Off ■ Main power supply is off.

or

■ Port power is turned off.

or

■ Both main power and port power are on,

but no device cable is plugged into the

port.

On Off ■ Either the device that is plugged into the

port is incapable of accepting power via its

Ethernet connection, or it has attempted to

draw too much power from the port. The

EPS has shut off the port power.

On On ■ An internal fault has occurred on this port.

The EPS has shut off the port power.

Front Panel Connections and LEDs 13

Unit Power Status Indications

AC LED DC LED

Off Off ■ No AC power supply is plugged into the AC

inlet and no redundant DC power supply is

connected.

or

■ An AC power supply fault has occurred and

no redundant DC power supply is

connected.

On Off ■ An AC power supply is plugged into the AC

inlet and no redundant DC power supply is

connected.

or

■ An AC power supply is plugged into the AC

inlet, and a power failure has occurred on

the redundant DC power supply that is

connected.

Off On ■ An AC power supply is not plugged into AC

inlet and a redundant DC power supply is

connected.

or

■ A main power supply fault has occurred

and a redundant DC power supply is

connected.

On On ■ An AC power supply is plugged into AC

inlet

and

■ A redundant DC supply is connected.

Self-Test Indications

TEST LED

Off Normal condition

On Self-test routine is in progress

Table 3 LED Behavior (continued)

Per-port Status Indications

14 CHAPTER 1: 3COM ETHERNET POWER SOURCE OVERVIEW

Rear Panel

Connections

Figure 3 shows the EPS rear panel.

Figure 3 Ethernet Power Source — Rear Panel

Information Label To facilitate reporting any future problem, record here the Part Number

(P/N) and Serial Number (S/N) of the EPS from the unit information label

on the rear panel.

■ Part number: ______________________

■ Serial number: _____________________

Console Port Use the Console Port to connect a remote (or local) terminal and perform

remote (or local) management. This port does not carry Ethernet traffic.

The Console Port uses a standard null modem cable. The port settings are

fixed and have these values:

■ Baud Rate: 9600

■ Data Bits: 8

■ Parity: None

■ Stop Bit(s): 1

If you are upgrading the firmware on the EPS using a local computer

connected by a null modem cable, the upgrade program configures the

communications port that you select on your computer (COM1 is the

default) to match these settings.

You can obtain the firmware upgrade program and instructions for using

it from this web site:

http://support.3com.com/

Look for the Network Telephony Products area.

CONSOLE PORT

9600, 8, 1, N

DC INPUTS: 24Vdc/16Amp max.

ONLY FOR USE WITH SPECIFIED

POWER SUPPLY.

REFER TO INSTRUCTIONS MANUAL.

SUPPLY DATA

V~

100-120/200-240 60/50

Hz A

3/1.5

Caution: Shock Potential. Disconnect

the Power Before Servicing.

Power Source Unit

P/N ..................

S/N ..................

Guidelines for Network Configuration 15

DC Power Socket The EPS has a 12-pin DC power socket for use only with an optional –24

VDC uninterruptible power supply (UPS). See the documentation that

comes with your UPS.

The EPS normally draws power from its internal power supplies. If an

external DC supply is connected, an electronic circuit in the EPS draws

power from either the internal or external supply to ensure steady power

delivery to the devices attached to the EPS output ports.

AC Power Socket The EPS adjusts to any supply voltage from 90 through 240V AC.

Guidelines for

Network

Configuration

Design your network with these guidelines in mind:

■ In a typical application, the maximum UTP cable length is 100 m (328

ft.) using Category 5 cable (from the main switch or hub to the

far-end NIC device).

■ 3Com recommends that you use a short UTP cable of 1 to 2 m (6 to 7

ft.) from the switch or hub to the EPS and a longer UTP cable of 1 to

90 m (3 to 300 ft.) from the EPS to the powered device such as the

NBX Business Telephone or a 3Com wireless access point.

Sample topologies are shown in Figure 4 and Figure 5.

16 CHAPTER 1: 3COM ETHERNET POWER SOURCE OVERVIEW

Figure 4 Sample EPS Topology with the NBX 100 Communications System

NBX 100

Switch or Hub

3Com Ethernet

Power Source

Wiring Closet

Patch Panel

Premises

Cabling

Wall

Jack

Guidelines for Network Configuration 17

Figure 5 Sample Network Topology with a 3Com Wireless Access Point

3Com Ethernet

Power Source

Wiring Closet

Patch Panel

Servers

3Com Wireless

Access Point

Premises

Cabling

Laptop with

Wireless

PCM Card

Switch or Hub

18 CHAPTER 1: 3COM ETHERNET POWER SOURCE OVERVIEW

2

INSTALLING THE

ETHERNET POWER SOURCE

AND END DEVICES

This chapter contains the information that you need to install and set up

the Ethernet Power Source (EPS) and end devices. The following topics

are described:

■ Choosing a Suitable Site

■ Rack-mounting the EPS

■ Power-up Sequence

■ Selecting the Correct Cables

■ Power Splitter Cable

■ Connecting an NBX Business Telephone

■ Connecting a 3Com Wireless Access Point

WARNING: Safety Information. Before you install or remove any

components from the Power Source unit or carry out any maintenance

procedures, you must read the safety information provided in Appendix A

of this guide.

AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever

tout composant du Power Source unit ou d'entamer une procédure de

maintenance, lisez les informations relatives à la sécurité qui se trouvent

dans l'Appendice A de ce guide.

WARNHINWEIS: Sicherheitsinformationen. Bevor Sie Komponenten

aus dem Power Source unit entfernen oder dem Power Source unit

hinzufuegen oder Instandhaltungsarbeiten verrichten, lesen Sie die

Sicherheitsanweisungen, die in Appendix A (Anhang A) in diesem

Handbuch aufgefuehrt sind.

20 CHAPTER 2: INSTALLING THE ETHERNET POWER SOURCE AND END DEVICES

Choosing a

Suitable Site

The EPS is suitable for an office environment. It can either be

rack-mounted in a standard 19-inch equipment rack (for example, in a

wiring closet or equipment room) or placed free-standing on a desk,

table, or counter. Both the 12-port and 24-port EPS packages (3C10220

and 3C10222 respectively) contain a rack-mounting kit with two

mounting brackets and six screws.

When you select a site for the EPS:

■ Always follow the appropriate configuration practices for Fast

Ethernet, including the 100-meter limit on total cable length.

■ Locate the EPS so that you can connect cables easily.

■ Locate cables away from sources of electrical noise such as:

■ Radios, transmitters, or broadband amplifiers

■ Power lines

■ Fluorescent lighting fixtures

■ Make sure that no water or moisture can enter the EPS case. The unit

is not designed for outdoor use.

■ Make sure that air can flow freely on all sides of the EPS for proper

cooling. 3Com recommends that you provide a minimum of 25 mm

(1 in.) clearance on each side of the unit.

■ If you use more than one EPS and place them on a table or desk, do

not place more than four units in a single stack. If you mount multiple

EPS units in a rack, this limit does not apply.

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