WAIT FOR DIGIT
Waits for a digit to be pressed.
Waits up to timeout milliseconds for channel to receive a DTMF digit. Returns
-1 on channel failure,
0 if no digit is received in the timeout, or the numerical value of the ascii of the digit if one is received. Use
-1 for the timeout value if you desire the call to block indefinitely.
This documentation was imported from Asterisk Version 18