EXFO MAX-700 - Manual (Page 283)

Managing Data
MAX-700 271
Using the USB to RS-232 Adapter
Using the USB to RS-232 Adapter
If you want to transfer data between your unit and a device that is only
equipped with RS-232 (serial) ports, you have to use a USB/RS-232 adapter.
Once the adapter has been detected, the unit assigns it a COM port number
(values begin at COM 3). This COM port number is kept in memory even
when you turn the unit off. This means that next time you connect the
same adapter to any of the USB ports, the unit will recognize the adapter
and identify it with the saved COM port number.
The communication between your unit and the device is established using
the PuTTY application.
I
MPORTANT
Only the USB/RS-232 adapters sold by EXFO are supported.