Cisco MGX MGX 8800 Hardware Installation Manual page 416

Installing the MGX 8850 (PXM1E/PXM45) Switch, MGX 8850/B or MGX 8880 Media Gateway
Install the Upper Fan Tray
Complete the following steps to install the upper fan tray.
Skip this step if you are installing an MGX 8880.
Note
If a component requires more than two screws for installation in the rack or cabinet, install the two
Tip
bottom screws first.
If you are installing the system in a 19-inch or 23-inch rack, place the upper fan tray on a flat and stable
Step 1
surface (for example, a table top). Use mounting screws and a Phillips-head screwdriver to attach the
mid-mounting brackets to the upper fan tray. You need a mounting kit to accommodate a 23-inch rack
(Cisco Part Number MGX-MNT23).
Note
Position the upper fan tray, which occupies 1 RU of space, directly above the switch.
Step 2
Ensure that the air flow direction arrow on the back of the upper fan tray is pointing up.
Use four mounting screws and a Phillips-head screwdriver to bolt the upper fan tray in the rack. See
Step 3
Figure 5-5
top-rear edge of the card cage.
If you are installing the fan tray in a 19-inch cabinet, attach the rear-mounting brackets to the rack, and
Step 4
use screws to secure the fan tray to the rear-mounting brackets.
Install the Exhaust Plenum
Complete the following steps to install the exhaust plenum.
On and MGX 8880, the exhaust plenum and fan tray are combined.
Note
If a component requires more than two screws for installation in the rack or cabinet, install the two
Tip
bottom screws first.
If you are installing the system in a 19-inch or 23-inch rack, place the exhaust plenum on a flat and stable
Step 1
surface (for example, a table top). Use mounting screws and a Phillips-head screwdriver to attach the
mid-mounting brackets to the exhaust plenum. You need a mounting kit to accommodate a 23-inch rack
(Cisco Part Number MGX-MNT23).
Cisco MGX 8800/8900 Series Hardware Installation Guide
5-32
If you are installing the fan tray in a 19-inch cabinet, it is front-mounted in the rack with support
from rear brackets.
for the correct placement of the upper fan tray. Verify that the base at the back aligns with the
Chapter 5 Installing the Cisco MGX Switch or Gateway
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006