H3C S6812 Series Installation Manual page 33

3. Align the screw holes in one extension rail with the cage nuts in a rear rack post. Use M6 screws
to attach the extension rail to the post. See Figure2-25.
4. Repeat the preceding steps to attach the other extension rail to the other rear rack post.
Keep the two extension rails at the same height so the extension rails can attach into the
extension brackets.
Figure2-34 Installing the extension rails
Mounting the switch in the rack
This task requires two people.
To mount the switch in the rack:
1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.
2. Verify that the mounting brackets and extension brackets have been securely attached to the
switch chassis. See
3. Verify that the extension rails have been correctly attached to the rear rack posts. See
"Attaching the extension rails to the
4. Attach cage nuts to the front rack posts and make sure they are at the same level as the
extension rails.
5. One person performs the following operations:
a. Supporting the bottom of the switch, aligns the extension brackets with the extension rails
on the rack posts.
b. Pushes the switch slowly to slide the extension rails along the extension brackets until the
mounting brackets are flush with the rack posts.
6. Another person uses M6 screws to attach the mounting brackets to the rack.
"Attaching the extension bracket to the
rack."
2-26
chassis."