3Com 3C10220 manual Solving EPS Problems

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Solving EPS Problems 29

Table 6 Solving EPS Problems (continued)

Problem	Possible Cause	Suggested Action

	The device was	■ If the cables do not appear to be a
	connected too	problem, and pins 4, 5, 7, and 8 are
	soon after being	not grounded, the end device may
	disconnected.	have been plugged in too soon after
		being unplugged, which can result
		in the device appearing to the EPS
		as a nonpowered device. Unplug
		the device cable from the EPS port,
		wait for 15 seconds, and then plug
		it back in. This pause gives the
		electronic circuits in the device time
		to fully discharge.

If none of these procedures identifies the problem, contact an authorized 3Com service representative for additional assistance.

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Contents 3Com Ethernet Power Source Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Troubleshooting List conventions that are used throughout this guide About this GuideConventions Comments DocumentationYear Compliance3Com Support About this Guide 3COM Ethernet Power Source Overview Fed through the unused pairs 7/8 and 4/5 Power source is designed for use with a standardOverview Front Panel Connections LEDs 2 Receive on pins 3LED Behavior 10/100BASE-TX Data and Power Output PortsTest LED Console Port Rear PanelSample topologies are shown in and Figure Guidelines for Network Configuration3COM Ethernet Power Source Overview Cabling Patch Panel Laptop with Wireless PCM Card 3COM Ethernet Power Source Overview Installing Ethernet Power Source END Devices Suitable Site Choosing aStandard 19-inch equipment racks Rack-mountingUnit, as shown in Figure Repeat and for the other side of the EPSInstalling the Ethernet Power Source and END Devices RJ-45 Output Plug per Port DTE NIC Side RJ-45 Input Plug per Port Switch SideList the RJ45 input and output plugs per port Data Power SplitterCable Access Point Ethernet Power SourceWiring Closet Patch Panel Premises 3Com WirelessInstalling the Ethernet Power Source and END Devices Solving EPS TroubleshootingProblems Solving EPS Problems Solving EPS Problems Solving NBX Business Telephone Problems To resolve the problemSolving NBX TelephoneSolving NBX Telephone Problems Solving Wireless Access Point Problems Wiring, hubs, and switches Troubleshooting Safety Information Connect it to an AC outlet power supply Important SafetyInformation Connected to an earthed grounded outletSécurité Importante ’information deSécurité Importante France et Pérou uniquementHeitsinformationen Wichtige SicherAppendix a Safety Information PIN Assignments Technical Specifications for the Ethernet Power SourcePin Assignments Pin Number Signal Function3Com Corporation Limited Warranty Warranties Exclusive