Document Conventions .......................................................................................................................................................14

Contacting Allied Telesis .....................................................................................................................................................15

Chapter 1: Overview ........................................................................................................................................................ 17

Features ..............................................................................................................................................................................18

AT-GS900MX Models ..................................................................................................................................................18

10/100/1000 Mbps Twisted Pair Ports .........................................................................................................................18

Power over Ethernet.....................................................................................................................................................19

SFP Slots .....................................................................................................................................................................19

S1 and S2 Stacking Slots .............................................................................................................................................19

LEDs.............................................................................................................................................................................20

Installation Options .......................................................................................................................................................20

MAC Address Table .....................................................................................................................................................20

Management Software and Interfaces .........................................................................................................................20

Management Methods..................................................................................................................................................20

Front and Back Panels ........................................................................................................................................................21

Management Panel .............................................................................................................................................................24

10/100/1000Base-T Twisted Pair Ports ...............................................................................................................................25

Speed ...........................................................................................................................................................................25

Duplex Mode ................................................................................................................................................................25

Wiring Configuration .....................................................................................................................................................26

Maximum Distance .......................................................................................................................................................26

Power over Ethernet.....................................................................................................................................................26

Cable Requirements.....................................................................................................................................................26

Port Pinouts ..................................................................................................................................................................27

Power over Ethernet ............................................................................................................................................................28

PoE Standards .............................................................................................................................................................28

Powered Device Classes .............................................................................................................................................29

Cable Requirements.....................................................................................................................................................29

Power Budget ...............................................................................................................................................................31

Port Prioritization ..........................................................................................................................................................31

Wiring Implementation..................................................................................................................................................32

SFP Slots.............................................................................................................................................................................33

Combo Twisted Pair Ports and SFP Slots ...........................................................................................................................34

Stacking Slots ......................................................................................................................................................................35

eco-friendly Button...............................................................................................................................................................36

LEDs ....................................................................................................................................................................................37

LEDs for the Twisted Pair Ports ...................................................................................................................................37

LEDs for the PoE Twisted Pair Ports............................................................................................................................38

LEDs for the Combo Twisted Pair Ports.......................................................................................................................40

LEDs for the SFP Slots ................................................................................................................................................42

LEDs for the Stacking Slots..........................................................................................................................................42

Switch ID LED ..............................................................................................................................................................43

USB Port..............................................................................................................................................................................45

Console Port ........................................................................................................................................................................46

Power Supply ......................................................................................................................................................................47

Chapter 2: Beginning the Installation ............................................................................................................................ 49

Reviewing Safety Precautions .............................................................................................................................................50

Choosing a Site for the Switch ............................................................................................................................................54