EXFO FTB-8510B Guia Del Usuario página 706

Introducing and Using the Graphical User Interface
Keyboard Usage
Full keyboard: Allows entering numbers, letters and some other
characters. The Back, Del, Shift and space bar keys have the same
functionality as a regular PC keyboard.
Trace message keyboard Allows entering alphanumerical characters
(ITU T.50) required for TTI, FTFL, J0, J1, and J2 Trace fields. Press the
Ctrl Char button to access these characters.
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FTB-8100 Series Transport Blazer