EXFO IQS-8100 Series Transport Blazer for IQS-600 - Manual (Page 546)

System Tab
532 IQS-8100 Series Transport Blazer
Default Test Preferences
For ODU2 background traffic (ODUflex client):
The above example shows that ODU2 that contains ODUflex
foreground traffic uses ODUflex (one tributary slot) background or
Unallocated traffic.
For ODU2 background traffic (ODU0 client):
The above example shows that ODU2 that contains ODU0
foreground traffic uses ODUflex (one tributary slot) background or
Unallocated traffic.