EXFO FTB-800 Series for FTB-1 - Manual (Page 309)

Test Results
NetBlazer 299
FTFL/PT
PT (Payload Type)

Payload Type and Code
Received displays the received payload signal type and its code in
hexadecimal format.
Expected allows to select the expected payload signal type either by
selecting the payload from the list or by typing its hexadecimal code.
Note: Refer to PT on page 8 for the list.

OPU-PLM, when selected, enables the OPU-PLM alarm analysis.

Copy RX uses the received payload type as the expected payload type.