EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 92)

Test Setup - Test Configurator, Timer, and System
80 FTB/IQS-88000 Series
Modify Structure Button

CFP: Use this configuration when an optical transceiver is inserted
in the CFP slot of the FTB/IQS-88000 Series module.

CFP2: Use this configuration when an EXFO CFP to CFP2 adapter is
inserted in the CFP slot of the FTB/IQS-88000 Series module.

Internal Loopback: Use this configuration to perform a loopback
before the CFP connector without interfacing with the optical
transceiver. The loopback is performed on each physical lane for
parallel interface.
Note: The Internal Loopback connector selection allows the isolation of the
platform module CFP slot electrical interface from the CFP device. This can
be useful in isolating a problem to a faulty CFP device.
FTB/IQS-88000 Series
Testing Unit
Internal Loopback