Allied Telesis AT GS900/8POE, Руководство по установке

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Preface ................................................................................................................................................................................11
Safety Symbols Used in this Document................................................................................................................................12
Where to Find Web-based Guides .......................................................................................................................................13
Contacting Allied Telesis ......................................................................................................................................................14
Online Support ..............................................................................................................................................................14
Email and Telephone Support.......................................................................................................................................14
Returning Products........................................................................................................................................................14
For Sales or Corporate Information...............................................................................................................................14
Warranty ........................................................................................................................................................................14
Chapter 1: Overview ..........................................................................................................................................................15
Features ...............................................................................................................................................................................16
Port Descriptions ..................................................................................................................................................................17
Twisted Pair Ports .........................................................................................................................................................17
SFP Combo Port ...........................................................................................................................................................18
LEDs.....................................................................................................................................................................................19
Power Supply .......................................................................................................................................................................21
Power over Ethernet.............................................................................................................................................................22
Power Budgeting ...........................................................................................................................................................22
Implementation..............................................................................................................................................................23
Ethernet Switching Basics ....................................................................................................................................................24
MAC Address Table ......................................................................................................................................................24
Duplex Mode .................................................................................................................................................................24
Store and Forward.........................................................................................................................................................25
Back Pressure and Flow Control...................................................................................................................................26
Network Topologies..............................................................................................................................................................27
Power Workgroup Topology ..........................................................................................................................................27
PoE Network Topology..................................................................................................................................................28
Chapter 2: Installation .......................................................................................................................................................29
Reviewing Safety Precautions..............................................................................................................................................30
Selecting a Site for the Switch..............................................................................................................................................32
Planning the Installation .......................................................................................................................................................33
Unpacking the Switch ...........................................................................................................................................................34
Installing the Switch on a Table or Desktop..........................................................................................................................35
Mounting the Switch on a Wall .............................................................................................................................................36
Installing the Switch in a Rack..............................................................................................................................................38
Installing an Optional SFP Transceiver ................................................................................................................................41
Cabling and Powering on the Switch....................................................................................................................................43
Cabling the Twisted Pair Ports ......................................................................................................................................43
Cabling an SFP Transceiver .........................................................................................................................................44
Powering on the Switch.................................................................................................................................................45
Chapter 3: Troubleshooting ..............................................................................................................................................47
PWR LED is Off....................................................................................................................................................................47
LNK/ACT Port LED is Off......................................................................................................................................................47
PD ERROR LED is On .........................................................................................................................................................48
Appendix A: Technical Specifications .............................................................................................................................49
Physical Specifications .........................................................................................................................................................49
Environmental Specifications................................................................................................................................................49
Contents