ENGINEERING, Maintenance and Troubleshooting | 3Com 8800 specification

22CHAPTER 5: ENGINEERING, MAINTENANCE AND TROUBLESHOOTING

Table 6 Troubleshooting Guide

Controller alarm	Power supply
Controller alarm	module
status	display	Possible problems	Possible solution

ALM or None	--	Controller failure	Replace the
			controller

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3Com 8800 manual ENGINEERING, Maintenance and Troubleshooting

Contents

3Com Switch Power Over Ethernet 3Com Corporation Campus Drive Marlborough, MA USA United States Government Legend Contents Contents Introduction PoE Power Rack Rear View Architecture and Configurations Introduction System Description Power SupplyPoE Power Rack Overview System Controller Power Supply ModuleVisual indicators Descriptions, colors, and functions are shown in Table RS485 and RS232 signals are described in and Table Pin Definition Distribution Panel Refer to Figure Safety Statements SafetySafety Symbols Safety Guidelines Installation and TestingIntroduction EMI Considerations Module Technical Specifications Number Model Ports Type Disconnect Detection Removing Power Supply Module and Dummy Faceplate Frame Grounding Powering on the Device Installation and Testing Troubleshooting ENGINEERING, Maintenance TroubleshootingMaintenance LED Indication ENGINEERING, Maintenance and Troubleshooting