Cisco Catalyst IW9167I - Chapter 5: Troubleshooting; Using the Reset Button; Troubleshooting the Access Point to Controller Join Process

Grommet5Fiber SFP1
Ferrule6Fiber cable2
Clamp nut7O-Ring3
Adapter body4
Step 3 Plug the fiber cable into the SFP.
Step 4 Thread the adapter body (with O-Ring) into the chassis.
Step 5 Insert the grommet into the ferrule, and press it into the adapter body.
Step 6 Tighten the clamp nut onto the adapter body until the grommet compresses onto the fiber cable.
Cisco Catalyst IW9167I Heavy Duty Access Point Hardware Installation Guide
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Installation Overview
Connecting to SFP Port Using Cable Gland