EXFO FastReporter 2 - Manual (Page 71)

Working with Projects (FR2-FC Mode)
Post Processing Software 61
Working in Loopback Mode

If you are using identifiers 3 and 4, you can have the application to
automatically invert them for the second file of the loopback.
Select the Inverted by Pairs option to use the automatic inversion.
The Overview page will reflect your choice as follows:
Inverted by Pairs
Status
Corresponding Locations A and B
Information
Not selected Row 1: Fiber 0001, Location A, Location B
Row 2: Fiber 0002, Location A, Location B
Row 3: Fiber 0003, Location A, Location B
Row 4: Fiber 0004, Location A, Location B
And so on.
Selected Row 1: Fiber 0001, Location A, Location B
Row 2: Fiber 0002, Location B, Location A
Row 3: Fiber 0003, Location A, Location B
Row 4: Fiber 0004, Location B, Location A
And so on.