EXFO FTB-800 Series for FTB-1 - Manual (Page 52)

Test Setup - Test Applications
42 FTB-700G/800 Series
SONET/SDH BERT
SONET/SDH BERT
Allows the validation of the SONET or SDH transport protocol by
performing a BERT test to check the traffic or payload stability over a
network facility.

Typical SONET/SDH BERT test applications:
Network
under test
Testing Unit DUT Loopback
FTB-700G/800 Series
Network
under test
Testing Unit Testing Unit
FTB-700G/800 Series FTB-700G/800 Series
Testing Unit
FTB-700G/800 Series
Network
under test
Network
under test