EXFO FTB-8510B Guia Del Usuario página 1300

Glossary
Next-Gen - Generic Framing Procedure (GFP)
The figure GFP-T vs GFP-F Features below provides a functional
comparison between GFP-F and GFP-T, while figure GFP-T vs. GFP-F
Frames below provides a comparison of the GFP frames for both modes.
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GFP-T vs GFP-F Features
GFP-T vs. GFP-F Frames
FTB-8100 Series Transport Blazer