EXFO FTB-2 - Manual (Page 163)

Managing Data
FTB-2 and FTB-2 Pro 153
Using the USB to RS-232 Adapter
5. From the device, set the communications parameters.
Note: The COM port number that you set on your device will probably differ from
the one that you used on your unit.
6. From the device, establish communication with the unit using your
favorite communication tool (PuTTY, HyperTerminal, etc.).
IMPORTANT
To be able to establish a communication between the unit and the
device, you must set the following parameters to the same values
as those defined on your unit:

Speed

Data bits

Stop bit

Parity

Flow control