Version 6.2
739
February 2011
SIP User's Manual
12. Configuration Parameters Reference
12.11.4 DTMF Parameters
The dual-tone multi-frequency (DTMF) parameters are described in the table below.
Table
12-32: 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 PSTN or analog side.
The valid range is -31 to 0 dB. The default value is -11 dB.
Note:
This parameter can also be configured per Tel Profile, using
the TelProfile parameter.
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.
EMS: DTMF Inter Interval
(msec)
[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.
EMS: DTMF Length (msec)
[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) 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.
EMS: Tx DTMF Relay Hang
Over Time (msec)
[TxDTMFHangOverTime]
Defines the Voice Silence time (in msec) after detecting the end of
DTMF or MF digits at the Tel/PSTN side when the DTMF Transport
Type is either Relay or Mute.
Valid range is 0 to 2,000 msec. The default is 1,000 msec.
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