Preface ...............................................................................................................................................................................11

Document Conventions .......................................................................................................................................................12

Contacting Allied Telesis .....................................................................................................................................................13

Chapter 1: Overview ........................................................................................................................................................ 15

Front and Rear Panels ........................................................................................................................................................16

Management Panel .............................................................................................................................................................18

Features ..............................................................................................................................................................................19

x550 Models .................................................................................................................................................................19

1Gbps and 10Gbps Twisted Pair Ports ........................................................................................................................19

1/2.5/5/10Gbps Twisted Pair Ports...............................................................................................................................19

Power Over Ethernet ....................................................................................................................................................20

1Gbps SFP or 10Gbps SFP+ Transceiver Slots ..........................................................................................................20

40Gbps QSFP+ Transceiver Slots ...............................................................................................................................20

LEDs.............................................................................................................................................................................21

Installation Options .......................................................................................................................................................21

Management Software and Interfaces .........................................................................................................................21

Management Methods..................................................................................................................................................21

1Gbps/10Gbps Twisted Pair Ports on the AT-x550-18XTQ Switch.....................................................................................22

Cable Requirements.....................................................................................................................................................22

LEDs.............................................................................................................................................................................23

1/2.5/5/10Gbps Twisted Pair Ports on the AT-x550-18XSPQm Switch...............................................................................25

Cable Requirements.....................................................................................................................................................25

LEDs.............................................................................................................................................................................27

PoE LEDs .....................................................................................................................................................................28

Power Over Ethernet on the AT-x550-18XSPQm Switch....................................................................................................30

PoE Standards .............................................................................................................................................................30

Powered Device Classes .............................................................................................................................................30

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

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

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

SFP+ Transceiver Slots on the AT-x550-18XSQ and AT-x550-18XSPQm Switches .........................................................33

SFP and SFP+ Transceivers........................................................................................................................................33

LEDs.............................................................................................................................................................................33

QSFP+ Transceiver Slots ....................................................................................................................................................35

QSFP+ Transceivers ....................................................................................................................................................35

Breakout Cables ...........................................................................................................................................................35

Port Numbering ............................................................................................................................................................36

LEDs.............................................................................................................................................................................36

eco-friendly Button...............................................................................................................................................................38

VCStack Feature .................................................................................................................................................................39

Switch ID LED .....................................................................................................................................................................40

USB Port..............................................................................................................................................................................42

Console Port ........................................................................................................................................................................43

Power Supply ......................................................................................................................................................................44

Software and Hardware Releases .......................................................................................................................................45

Chapter 2: Beginning the Installation ............................................................................................................................ 47

Reviewing Safety Precautions .............................................................................................................................................48

Choosing a Site for the Switch ............................................................................................................................................52