# Installing SRP I/O and SRP Modules

You must install SRP modules in specific slots in each router. See Table 4 for SRP module slot assignments.

Table 4: SRP Module Slot Assignments

Router | Slot
--- | ---
ERX14xx models | 6 and 7
ERX7xx models | 0 and 1
ERX310 router | 0

| Note: Because of different physical dimensions and switch fabric capabilities, SRP modules are not interchangeable between systems. For example, the 10-Gbps SRP module used in ERX7xx and ERX14xx models cannot be used in an ERX310 router, and vice versa.

| Note: Install the SRP I/O module before you install the SRP module; otherwise, the system diagnostics will fail.

## Installing an SRP I/O Module

To install an SRP I/O module:

1. Ground yourself by using an antistatic wrist strap or other device and connect it to the ESD grounding jack on the chassis.
2. 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.
3. Remove the SRP I/O module from its antistatic bag, being careful not to touch module components, pins, leads, or solder connections.
4. Slide the module into the chassis by placing it between the guides of the selected slot and pushing the module until it stops.

   | Note: See the figures in ERX Overview for module locations.

5. Tighten the module's captive screws using a No. 2 Phillips screwdriver. Turn both screws several times before tightening them completely to allow the module to sit correctly.

   | Caution: Do not overtighten the screws.

## Installing an SRP Module

To install an SRP module:

1. Ground yourself by using an antistatic wrist strap or other device and connect it to the ESD grounding jack on the chassis.

   | Note: See the figures in ERX Overview for module locations.

2. Choose the slot in which you want to install the module.
   - ERX14xx models—Slot 6 or 7
   - ERX7xx models—Slot 0 or 1
   - ERX310 router—Slot 0
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 SRP 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 20.

   Figure 20: Ejectors in 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. Then verify, if applicable, that the module matches its corresponding module (I/O module or line 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 20) and exerting forward pressure on the module.
8. Tighten the module's captive screws using a No. 2 Phillips screwdriver. Alternately turn each screw several times before tightening them completely to allow the module to sit correctly.

   | Caution: Do not overtighten the screws.