enum DtmfDetectionMode

Detection mode of DtmfReceiverService.

References from:
DtmfReceiverService;

0
PAUSE_BEFORE_PULSE
Digits are recognized according to the standard.
A valid Dual-tone multifrequency (DTMF) digit is a pause followed by a pulse.
1
PAUSE_BEFORE_OR_AFTER_PULSE
2
PAUSE_BEFORE_AFTER_1ST_PULSE
  enum DtmfDetectionMode