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The MAPNET transceiver modules can be mounted to either 4100 Back Boxes (PID series
2975-91xx) or 4100U Back Boxes (PID series 2975-94xx).
• The 4120/4100-0110 and 4100-9802 versions are used with 4100 Back Boxes.
• The 4100-3102 and 4100-9812 versions are used with 4100U Back Boxes.
This section covers 4100-3102 and 4100-9812 module mounting into 2975-94xx Back Boxes.
Up to two motherboards may be installed with the system CPU in the CPU bay.
Use the following directions to mount a motherboard into a CPU bay.
1. Orient the motherboard with the connector labeled J1 on the right and the header labeled
P1 on the left.
2. Slide the motherboard to the right until the pins from P1 on the motherboard to the right
are completely inserted in the motherboard’s J1 connector.
3. Attach four lockwashers and metal standoffs to the chassis, and secure the motherboard
to the chassis using four #6 screws.
Figure 6. Installing the Motherboard into a 4100U CPU Bay
Continued on next page
Installing Motherboards into 2975-94
xx
Back Boxes (4100U)
Overview
Installing into a
2975-94
xx
CPU Bay
P1
J1
Slide the motherboard to the right until P1 on the first
motherboard connects with J1 on the next one.
CPU
SPS
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