Cisco Cisco Email Security Appliance C680 Installation Guide

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Install the Appliance in a Rack
Install the Cisco C690 Email Security Appliance using the slide 
rails supplied. For information about installing the appliance in 
a rack, see the Cisco 90 Series Content Security Appliances 
Installation and Maintenance Guide
.
Appliance Placement in a Rack
  •
Ambient Temperature—To prevent the appliance from 
overheating, do not operate it in an area that exceeds an 
ambient temperature of 104°F (40°C).
  •
Air Flow—Be sure that there is adequate air flow around 
the appliance. 
  •
Mechanical Loading—Be sure that the appliance is level 
and stable to avoid any hazardous conditions.