Dell S3048 Guide De Mise En Route page 13

Figure 4. Four-Post Threaded Configuration
Install the S3048-ON System
You can mount the system in the 1U front-rack or 1U two-post (flush and
center) configurations. The following is an example of a front-rack
configuration.
For the 1U two-post (flush and center) configurations, slide the system into
the rails in the same manner as the four-post configurations.
Installing a 1U Front-Rack
You must configure the rails that are attached to the system.
1. Attach the switch rails (inner chassis members) to the S3048–ON system.
Item 3 in the following illustration shows the detail for the front standoff
with the locking tab.
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