EXFO FTB-800 Series for FTB-1 - Manual (Page 575)

Glossary
NetBlazer 565
SONET/SDH
Low Order Path AIS-V TU-AIS
LOP-V TU-LOP
RDI-V LP-RDI
ERDI-VCD ERDI-CD
ERDI-VPD ERDI-PD
ERDI-VSD ERDI-SD
RFI-V LP-RFI
UNEQ-V LP-UNEQ
TIM-V LP-TIM
PLM-V LP-PLM
BIP-2 BIP-2
REI-V LP-REI
Layer SONET SDH