pub const KEY_KEYPAD_MASK: &str = "telephony:keypad_mask";Expand description
Set this state key to true to mask the keypad: while it is set, the
caller’s audio reaches neither the model nor the recording (it is
replaced with silence), and keypresses go to KEY_KEYPAD_ENTRY instead
of KEY_DTMF. This is the “pause and resume” pattern for taking card
numbers and PINs by keypad. Set it back to false to resume.