2 INSTALLING THE SWITCH 7750The following sections describe how to prepare and install the components of theSwitch 7750:■ Preparing to Install■ General Site Requirements■ Installation Checklist■ Installing the Chassis■ Installing the Cabling Rack■ Installing a Module■ Installing a Submodule■ Connecting the Ground Wire■ Connecting and Configuring Power■ Installing the Fan Assembly■ Installing Cables■ Connecting Module Cables■ Post-installation ChecklistWARNING: Only trained and qualified personnel should install and maintain3Com products.Preparing to Install This section provides guidelines for preparing your site and switch for installation.General SafetyRecommendationsBefore installing your switch, note the following safety recommendations:■ Switch off the power supply before connecting the cables.■ Keep the switch away from heat sources.■ To ensure normal heat dissipation, do not stack switches.■ Do not keep the switch in a damp place, and prevent liquid from getting intothe switch.■ Ensure that the neutral point of the power is grounded properly, to avoidpersonal injury.■ Ensure that the power is off before plugging or unplugging the modules andcables of the switch.■ Before moving the chassis, disconnect all the power cords and external cables.■ To avoid damage to the switch, connect all the cables correctly. Never connecttelephone cables (including the ISDN lines) to the console or AUX port.