Preface ...............................................................................................................................................................................13

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

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

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

Front and Rear Panels ........................................................................................................................................................18

Management Panel .............................................................................................................................................................20

Features ..............................................................................................................................................................................21

x550 Models .................................................................................................................................................................21

1Gbps and 10Gbps Twisted Pair Ports ........................................................................................................................21

1/2.5/5/10Gbps Twisted Pair Ports...............................................................................................................................22

Power Over Ethernet ....................................................................................................................................................22

1Gbps SFP or 10Gbps SFP+ Transceiver Ports..........................................................................................................22

40Gbps QSFP+ Transceiver Slots ...............................................................................................................................22

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

Installation Options .......................................................................................................................................................23

Management Software and Interfaces .........................................................................................................................23

Management Methods..................................................................................................................................................23

1Gbps/10Gbps Twisted Pair Ports on the AT-x550-18XTQ Switch.....................................................................................24

Cable Requirements.....................................................................................................................................................24

LEDs.............................................................................................................................................................................25

1/2.5/5/10Gbps Twisted Pair Ports on the AT-x550-18XSPQm Switch...............................................................................27

Cable Requirements.....................................................................................................................................................27

LEDs.............................................................................................................................................................................29

PoE LEDs .....................................................................................................................................................................30

Power Over Ethernet on the AT-x550-18XSPQm Switch....................................................................................................32

PoE Standards .............................................................................................................................................................32

Powered Device Classes .............................................................................................................................................32

Power Budget ...............................................................................................................................................................33

Port Prioritization ..........................................................................................................................................................33

Mode A Wiring Configuration .......................................................................................................................................34

SFP+ Transceiver Ports on the AT-x550-18XSQ and AT-x550-18XSPQm Switches.........................................................35

SFP and SFP+ Transceivers........................................................................................................................................35

LEDs.............................................................................................................................................................................35

QSFP+ Transceiver Ports....................................................................................................................................................37

QSFP+ Transceivers ....................................................................................................................................................37

Breakout Cables ...........................................................................................................................................................37

Port Numbering ............................................................................................................................................................38

LEDs.............................................................................................................................................................................38

Port Numbering ............................................................................................................................................................40

eco-friendly Button...............................................................................................................................................................41

VCStack Feature .................................................................................................................................................................42

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

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

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

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

Designating Ports in the Command Line Interface for Stacks .............................................................................................48

Software and Hardware Releases .......................................................................................................................................49