EXFO FTB-800 Series for FTB-1 - Manual (Page 53)

Test Setup - Test Applications
NetBlazer 43
SONET/SDH BERT

Path/Mapping
The SONET/SDH BERT test application offers the following
path/mapping structures depending on the inserted SFP/SFP+
transceiver, and enabled options.
For SONET BERT