This function returns the number of DTMF keys that have been detected. Use this function to check if any keys on the phone keypad have been pressed.
Parameter: Line
Type: Integer
Description: The phone line to check.
Return value: DTMF
value
Type: Integer
Description: The count of the number of DTMF keys that have been detected
dim digit_count
digit_count = hsp.LINEGetDTMFCount(1)