Version 5.8 353 September 2009
SIP User's Manual 6. Configuration Parameters Reference
6.15.4 DTMF Parameters
The Dual-tone multi-frequency (DTMF) parameters are described in the table below.
Table 6-58: DTMF Parameters
Parameter Description
Web/EMS: DTMF Transport Type
[DTMFTransportType]
Determines the DTMF transport type.
 [0] DTMF Mute = Erases digits from voice stream and
doesn't relay to remote.
 [2] Transparent DTMF = Digits remain in voice
stream.
 [3] RFC 2833 Relay DTMF = Erases digits from voice
stream and relays to remote according to RFC 2833
(default).
 [7] RFC 2833 Relay Rcv Mute = DTMFs are sent
according to RFC 2833 and muted when received.
Note: This parameter is automatically updated if the
parameters TxDTMFOption or RxDTMFOption are
configured.
Web: DTMF Volume (-31 to 0 dB)
EMS: DTMF Volume (dBm)
[DTMFVolume]
DTMF gain control value (in decibels) to the or analog
side.
The valid range is -31 to 0 dB. The default value is -11
dB.
Web: DTMF Generation Twist
EMS: DTMF Twist Control
[DTMFGenerationTwist]
Defines the range (in decibels) between the high and low
frequency components in the DTMF signal. Positive
decibel values cause the higher frequency component to
be stronger than the lower one. Negative values cause
the opposite effect. For any parameter value, both
components change so that their average is constant.
The valid range is -10 to 10 dB. The default value is 0 dB.
Note: For this parameter to take effect, a device reset is
required.
[DTMFInterDigitInterval]
Time in msec between generated DTMF digits to PSTN
side (if TxDTMFOption = 1, 2 or 3).
The default value is 100 msec. The valid range is 0 to
32767.
[DTMFDigitLength]
Time (in msec) for generating DTMF tones to the PSTN
side (if TxDTMFOption = 1, 2 or 3). It also configures the
duration that is sent in INFO (Cisco) messages.
The valid range is 0 to 32767. The default value is 100.
EMS: Rx DTMF Relay Hang Over Time
(msec)
[RxDTMFHangOverTime]
Defines the Voice Silence time (in msec units) after
playing DTMF or MF digits to the Tel / PSTN side that
arrive as Relay from the IP side.
Valid range is 0 to 2,000 msec. The default is 1,000
msec.
Web/EMS: RFC 2833 Payload Type
[RFC2833PayloadType]
The RFC 2833 DTMF relay dynamic payload type.
The valid range is 96 to 99, and 106 to 127. The default
is 96. The 100, 102 to 105 range is allocated for
proprietary usage.
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