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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 3 Preparing for Installation
How Cisco MGX Systems are Shipped
Caution PXM45 controller cards go in slots 7 and 8 on the MGX 8850 (PXM45), MGX 8850/B (PXM45), or
MGX 8950 switch.
PXM1E controller cards go in slots 7 and 8 on the MGX 8850 (PXM1E) or MGX 8850/B (PXM45)
switch.
PXM1E controller cards go in slots 1 and 2 on the MGX 8830 or MGX 8830/B switch.
Do not insert controller cards into any other slots. All other slots have a guide pin where the controller
card slots do not. If you push a controller card into an incorrect slot, the guide pin will break the electrical
edge connector on the controller card. It does not take much force for this to happen. Then, if the
controller card, which now has a broken edge connector, is inserted into the correct controller card slot,
the broken edge connector will cause further damage by bending pins on the backplane.
How Cisco MGX Systems are Shipped
In general, the MGX switch systems, if shipped assembled, are “ready to go” when removed from the
box. Each system comprises the chassis, intake plenum, exhaust plenum, fans, power supplies, and
cables. The cards are already installed in the chassis. The power supplies are installed in the intake
plenum. The customer would need to place the various rack-mounted parts in a specific order, which is
described in the remainder of this chapter for each switch.
The STRAT-M cabinet is an older model cabinet. It is ordered with the chassis “ready to go” or the
cabinet by itself.
Each component can be purchased individually as a spare.
Site Requirements for the MGX 8850 or MGX 8850/B Switch
This section describes requirements for the site where the MGX 8850 or MGX 8850/B switch is to be
installed. Before you install the switch, ensure that all of the criteria in this section are met.
Table 3-1 summarizes the space, weight, and power requirements for the switch. Specifications are
described in greater detail in the following sections:
• Environmental Requirements, page 3-11
• Power Requirements, page 3-17
Table 3-1 lists the physical specifications for the Cisco MGX 8850 or MGX 8850/B switch.
Note One rack unit (RU) is equal to 1.75 inches (4.45 cm).