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