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# Installing an SRP Module or SFM Module

You must install SRP modules in slot 6 or slot 7, and SFM modules in slots 8, 9, or 10. Four of the five fabric slots (SRP and SFM modules) must have a module installed for the router to function. A minimum system configuration requires all three SFMs and at least one SRP module to be installed. See Fabric Slices for more information.

To install an SRP module or SFM module:

1. Ground yourself by using an antistatic wrist strap or other device and connect it to one of the ESD grounding jacks on the chassis.
2. Choose the slot in which you want to install the module.
   - SRP module – slot 6 or 7
   - SFM module – slot 8, 9, or 10

   See Figure 12 and Figure 14 for module locations.

   | Note: Four of the five fabric slots (SRP and SFM modules) must have a module installed for the router to function. A minimum system configuration requires all three SFMs and at least one SRP module to be installed.

3. With a No. 2 Phillips screwdriver, loosen the captive screws that secure the blank filler panel covering the empty chassis slot, if present, and remove the filler panel.
4. Remove the module from its antistatic bag, being careful not to touch module components, pins, leads, or solder connections.
5. Verify that the ejectors are in the open position, as shown in Figure 19.

   Figure 19: Closing Ejectors from the Open Position

6. Slide the module into the chassis by placing it between the guides of the selected slot and pushing the module until it stops.

   The module stops sliding when the ejectors make contact with the front of the chassis.

   | Caution: If you meet strong resistance when attempting to seat the module using the ejectors, remove it from the chassis and confirm that the slot is designed to hold the module. Also, be sure that you have aligned the top and bottom edges in the correct matching tracks.

7. Insert the module into the backplane by simultaneously depressing both ejectors (as shown in Figure 19), exerting forward pressure on the module.
8. Tighten the module's captive screws using the No. 2 Phillips screwdriver.

   | Note: Tighten the captive screws completely before installing an adjacent module so that proper EMI gasket compression occurs. Failure to do this can make it difficult to install adjacent modules.

   | Caution: Do not overtighten the screws.

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