# Installing and Removing SFPs

This section describes how to replace small form-factor pluggable transceivers (SFPs) on IOAs that support these devices. A range of SFPs that support different optical modes (multimode, single mode, and so forth) and cabling distances is available. You can replace the SFPs without disabling the interfaces or removing the module from the system.

## Installing SFPs

To install SFPs:

1. Ground yourself by using an antistatic wrist strap or other device and connect it to an ESD grounding jack.
2. Identify the following items on the SFP (Figure 22):
   - The connection circuitry on the base
   - The cable connectors on the front (which are protected by a dust cover)

   Figure 22: Representative SFP

   | Caution: Be sure to position the SFP correctly before you install it.

3. Hold the SFP so that:
   - The connection circuitry is adjacent to the LK and ACT markings on the IOA's faceplate.
   - The cable connectors will be visible when you install the SFP.

   For the correct orientation, see Figure 23.

   Figure 23: Installing an SFP on an IOA

4. Slide the SFP as far as you can into the IOA until the SFP clicks into place.

   If the SFP does not slide smoothly into the IOA, make sure that the orientation of the SFP is correct.

5. Gently pull the SFP to confirm that it is inserted correctly.

   If the SFP comes out of the slot when you pull it, repeat Step 4.

6. Remove the dust cover that protects the cable connectors.
7. Connect the new cables to the SFP.

## Removing SFPs

To remove an SFP:

1. Obtain an antistatic container for the SFP you plan to remove. (See Storing Modules and Components.)
2. Ground yourself by using an antistatic wrist strap or other device and connect it to an ESD grounding jack.
3. Disconnect the cable from the SFP on the IOA.
4. Identify the release mechanism for the SFP.

   Different SFPs use different release mechanisms. See Figure 24 for possible release mechanisms, which include:

   - A button that you press inward
   - A ring that you press inward
   - A bar that you pull sideways, then outward
   - A tab that you pull sideways, then outward

   Figure 24: Possible Release Mechanisms on the SFP

5. Release the SFP and pull it out of the slot.
6. Place the SFP in an antistatic bag.

When you have replaced the SFPs and connected the cables, issue the appropriate show interface command for each interface to verify that the interface is operational (up).