4.20.16. PrmDTMFDurationDflt (DTMF On Time)

Parameter Number: 0x1b0f

Description: The PrmDTMFDurationDflt parameter is used when no on-time and off-time is passed to the coder (only the digit itself is passed). Dual Tone Multi-frequency (DTMF) tones are comprised of two parts: on-time and off-time. The duration of each can be set separately, to ensure transmission of DTMF tones of sufficient length to be recognized by the receiving side.

Figure 7. DTMF Tone Generation (DTMFOnTime)

The PrmDTMFDurationDflt parameter sets the length of time in milliseconds that the DTMF tone is on.

Values: 0x3c to 0xf0

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