Dell S4048T-ON Guide De Mise En Route page 12

Figure 3. Attaching Assembly to S4048T-ON PSU Side
CAUTION: Take care not to damage the attached ground wire as you
proceed to install the switch.
After the switch is installed in the rack, see Completing the Ground Wire
Installation.
Installing the Dell ReadyRails System
The ReadyRails rack mounting system is provided to easily configure your
rack so that you can install your switch.
The Dell ReadyRails™ system is provided for 1U front-rack and two-post
installations. The ReadyRails system includes two separately packaged rail
assemblies and two rails that are shipped attached to the sides of the switch.
Install the ReadyRails system using the 1U tool-less method or one of three
possible 1U tooled methods (two-post flush mount, two-post center mount,
or four-post threaded).
CAUTION: Do not use the mounted ReadyRails as a shelf or a
workplace.
NOTE: The illustrations in this document are not intended to represent a
specific switch.
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