Replace Fan Modules....................................................................................................................................................................72
Remove the Device from the Rack.....................................................................................................................................73
Remove the Switch from a Four-Post Rack.......................................................................................................73
Remove the Switch from a Two-Post Rack........................................................................................................75
Monitor the Switch.....................................................................................................................77
System Status LEDs........................................................................................................................................................................77
RJ-45 Management Port LEDs..............................................................................................................................................78
QSFP28 Port LEDs...........................................................................................................................................................................78
800 W AC Power Supply LEDs...............................................................................................................................................79
800 W DC Power Supply LEDs..............................................................................................................................................79
Technical Specications............................................................................................................81
7720 Series Technical Specications..................................................................................................................................81
External Interfaces..................................................................................................................................................................81
Weights and Dimensions of Accessories.............................................................................................................82
Acoustic Noise and Fan Speed..............................................................................................................................................83
Acoustic Noise...........................................................................................................................................................................83
Fan Tray and Speed Variation.......................................................................................................................................83
CPU, Memory Specications...................................................................................................................................................84
Mean Time Between Failures.................................................................................................................................................84
Power Specications.....................................................................................................................................................................84
Power Supply Specications.........................................................................................................................................84
Power Consumption............................................................................................................................................................85
Power and Heat Dissipation.......................................................................................................................................... 85
Environmental....................................................................................................................................................................................85
Environmental Specications.......................................................................................................................................85
Environmental Compliance...........................................................................................................................................85
Environmental Operating Conditions...................................................................................................................86
Packaging and Storage Specications................................................................................................................. 86
Standards............................................................................................................................................................................................... 86
North American ITE ............................................................................................................................................................ 86
European ITE..............................................................................................................................................................................86
International ITE......................................................................................................................................................................86
EMI/EMC Standards....................................................................................................................................................................... 87
North American EMC for ITE.........................................................................................................................................87
European EMC Standards...............................................................................................................................................87
International EMC Certications................................................................................................................................87
Country Specic...................................................................................................................................................................... 87
IEEE 802.3 Media Access Standards....................................................................................................................... 88
Power Cord Requirements for AC-Powered Switches and AC Power Supplies.............................88
Console Connector Pinouts.....................................................................................................................................................88
Safety Information...................................................................................................................... 91
Considerations Before Installing............................................................................................................................................91
General Safety Precautions.......................................................................................................................................................92
Maintenance Safety........................................................................................................................................................................93
Fiber Optic Ports and Optical Safety.................................................................................................................................93
Cable Routing for LAN Systems........................................................................................................................................... 94
Install Power Supply Units and Connect Power......................................................................................................94
Select Power Supply Cords.......................................................................................................................................................95
Table of Contents
Extreme 7720 Hardware Installation Guide v
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