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Mediant 2000 SIP User's Manual
Table 8-3: Summary of DTMF Configuration Parameters (continues on pages 144 to 145)
ini File Field Name
[Web Name]
RxDTMFOption
RFC2833PayloadType
MGCPDTMFDetectionPont 0 = Send out of-band DTMF message on starting point of DTMF digit
DTMFDigitLength
DTMFInterDigitInterval
DTMFVolume
[DTMF Volume]
DTMFTransportType
[DTMF Transport Type]
Version 4.4
Defines the supported Receive DTMF negotiation method.
0 = Don't declare RFC 2833 Telephony-event parameter in SDP
1 = n/a
2 = n/a
3 = Declare RFC 2833 "Telephony-event" parameter in SDP (default)
The gateway is designed to always be receptive to RFC 2833 DTMF relay packets.
Therefore, it is always correct to include the "Telephony-event" parameter as a default in
the SDP. However some gateways use the absence of the "telephony-event" from the
SDP to decide to send DTMF digits inband using G.711 coder, if this is the case you can
set "RxDTMFOption=0".
The RFC 2833 DTMF relay dynamic payload type.
Range: 96 to 99, 106 to 127; Default = 96
The 100, 102 to 105 range is allocated for proprietary usage.
Cisco is using payload type 101 for RFC 2833.
Note: When RFC 2833 payload type (PT) negotiation is used (TxDTMFOption=4), this
payload type is used for the received DTMF packets. If negotiation isn't used, this
payload type is used for receive and for transmit.
1 = Send DTMF message on ending point of DTMF digit (default)
Time in msec for generating DTMF tones to the PSTN side (if received in INFO).
The default value is 100 msec.
Time in msec between generated DTMFs to PSTN side (if received in INFO).
The default value is = 100 msec.
DTMF level for regenerated digits to PSTN side (-31 to 0, corresponding to -31 dBm to 0
dBm in 1 dB steps, default = -11 dBm)
0 = Erase digits from voice stream, do not relay to remote.
2 = Digits remain in voice stream.
3 = Erase digits from voice stream, relay to remote according to RFC 2833.
Note: This parameter is automatically updated if one of the following parameters is
configured: IsDTMFUsed, TxDTMFOption or RxDTMFOption.
8. Gateway Capabilities Description
Valid Range and Description
145
July 2005
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