| Abbreviation | Definition |
|---|---|
| FEBE-I | Far End Block Error count - Interleaved data |
| FEC | Forward Error Correction |
| FECC-F | Forward Error Correction Count - Fast data |
| FECC-I | Forward Error Correction Count - Interleaved data |
| FELB | Far-End Loop Back |
| FERF | Far-End Receive Failure |
| FEXT | Far-End Cross Talk |
| FFC | Flat Flexible Cable |
| FFC | Front-Facing Camera |
| FFT | Fire-Fighter Telephone |
| FGA | Feature Group A |
| FGD | Feature Group D |
| FH | Frequency Hopping |
| FHMA | Frequency Hopping Multiple Access |
| FICORA | FInnish COmmunications Regulatory Authority |
| FiOS | Fiber Optic Service |
| FiOS | Fiber Optic Services as provided by Verizon |
| FITL | Fiber In The Loop |
| FL | Fiber Link |
| FLC | Forward Link Channel |