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Class TelephonyDtmf (2.23.3)
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DTMF <https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling>__
digit in Telephony Gateway.
Values:
TELEPHONY_DTMF_UNSPECIFIED (0):
Not specified. This value may be used to
indicate an absent digit.
DTMF_ONE (1):
Number: '1'.
DTMF_TWO (2):
Number: '2'.
DTMF_THREE (3):
Number: '3'.
DTMF_FOUR (4):
Number: '4'.
DTMF_FIVE (5):
Number: '5'.
DTMF_SIX (6):
Number: '6'.
DTMF_SEVEN (7):
Number: '7'.
DTMF_EIGHT (8):
Number: '8'.
DTMF_NINE (9):
Number: '9'.
DTMF_ZERO (10):
Number: '0'.
DTMF_A (11):
Letter: 'A'.
DTMF_B (12):
Letter: 'B'.
DTMF_C (13):
Letter: 'C'.
DTMF_D (14):
Letter: 'D'.
DTMF_STAR (15):
Asterisk/star: '*'.
DTMF_POUND (16):
Pound/diamond/hash/square/gate/octothorpe:
'#'.
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Last updated 2026-03-31 UTC.
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