
5
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
Contents