How to use "Input" control
Input control allows system to collect data from caller phone keypad input while on the call.
Validation section is where you validate caller input data. This is the place where you define the rule to validate the data that the caller input. Input length from is the number of digit that you accept from the caller input. Valid values is a set of value that you expected from caller; It can be comma-separated values, or semicolon-separated values.
Store result as
will store the caller input in a variable you have given in the text box.
Click Save to finish.