Contents

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
Management Software Updates	14
Chapter 1: Overview	15
Model Configurations	16
Model Descriptions	17
AT-8516F/SC	17
AT-8524M	18
AT-8524POE	19
AT-8550GB	20
AT-8550SP	21
Port Descriptions	22
10/100Base-TX Twisted Pair Ports	22
10/100/1000Base-T Twisted Pair Ports	24
100Base-FX Fiber Optic Ports	25
Power Over Ethernet	27
Power Budgeting	27
Implementation	28
GBIC and SFP Slots	29
Module Expansion Slots	30
LEDs	31
Twisted Pair Port LEDs and the LED Mode Select Button	31
Fiber Optic Port LEDs	34
GBIC and SFP Expansion Slot LEDs	35
System LEDs	36
RS-232 Terminal Port	37
Power Options and Connectors	38
RPS Connector	38
AC Power Connector	39
DC Power Connector	39
A Few Basics about Ethernet Switching	40
MAC Address Table	40
Duplex Mode	40
Store and Forward	41
Back Pressure and Flow Control	41
Network Topologies	43
Power Workgroup Topology	43
Collapsed Backbone Topology	43
Mixed Topology	44
Chapter 2: Installation	47
Reviewing Safety Precautions	48

Allied Telesis AT-8500 Series manual Contents