3Com 3C10220 manual 10/100BASE-TX Data and Power Output Ports, LED Behavior

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12CHAPTER 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 -24VDCon 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.

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Contents 3Com Ethernet Power Source Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Troubleshooting About this Guide ConventionsList conventions that are used throughout this guide Documentation CommentsYear Compliance3Com Support About this Guide 3COM Ethernet Power Source Overview Power source is designed for use with a standard OverviewFed through the unused pairs 7/8 and 4/5 2 Receive on pins 3 Front Panel Connections LEDs10/100BASE-TX Data and Power Output Ports LED BehaviorTest LED Rear Panel Console PortGuidelines for Network Configuration Sample topologies are shown in and Figure3COM Ethernet Power Source Overview Cabling Patch Panel Laptop with Wireless PCM Card 3COM Ethernet Power Source Overview Installing Ethernet Power Source END Devices Choosing a Suitable SiteRack-mounting Standard 19-inch equipment racksUnit, as shown in Figure Repeat and for the other side of the EPSInstalling the Ethernet Power Source and END Devices RJ-45 Input Plug per Port Switch Side List the RJ45 input and output plugs per portRJ-45 Output Plug per Port DTE NIC Side Power Splitter CableData Ethernet Power Source Access PointWiring Closet Patch Panel Premises 3Com WirelessInstalling the Ethernet Power Source and END Devices Troubleshooting ProblemsSolving EPS Solving EPS Problems Solving EPS Problems To resolve the problem Solving NBX Business Telephone ProblemsSolving NBX TelephoneSolving NBX Telephone Problems Solving Wireless Access Point Problems Wiring, hubs, and switches Troubleshooting Safety Information Important Safety Connect it to an AC outlet power supplyInformation Connected to an earthed grounded outlet’information de Sécurité ImportanteFrance et Pérou uniquement Sécurité ImportanteWichtige Sicher HeitsinformationenAppendix a Safety Information Technical Specifications for the Ethernet Power Source PIN AssignmentsPin Number Signal Function Pin Assignments3Com Corporation Limited Warranty Warranties Exclusive