AudioCodes Mediant 500L MSBR - Page 895

User's Manual 67. Configuration Parameters Reference
Version 6.8 895 Mediant 500L MSBR
Parameter Description
Profile, the settings of this global parameter is ignored for
calls associated with the IP Profile.
Web/EMS: 1st Tx DTMF Option / 2nd
Tx DTMF Option
CLI: configure voip > gw dtmf-and-
suppl dtmf-and-dialing > dtmf-options
[TxDTMFOption]
Defines up to two preferred transmit DTMF negotiation
methods.
 [0] Not Supported = (Default) No negotiation - DTMF
digits are sent according to the parameters
DTMFTransportType and RFC2833PayloadType.
 [1] INFO (Nortel) = Sends DTMF digits according to IETF
Internet-Draft draft-choudhuri-sip-info-digit-00.
 [2] NOTIFY = Sends DTMF digits according to IETF
Internet-Draft draft-mahy-sipping-signaled-digits-01.
 [3] INFO (Cisco) = Sends DTMF digits according to
Cisco format.
 [4] RFC 2833.
 [5] INFO (Korea) = Sends DTMF digits according to
Korea Telecom format.
The format of the ini file table parameter is as follows:
[TxDTMFOption]
FORMAT TxDTMFOption_Index = TxDTMFOption_Type;
[\TxDTMFOption]
For example:
TxDTMFOption 0 = 1;
TxDTMFOption 1 = 3;
Notes:
 DTMF negotiation methods are prioritized according to
the order of their appearance.
 When out-of-band DTMF transfer is used ([1], [2], [3], or
[5]), the parameter DTMFTransportType is automatically
set to 0 (DTMF digits are erased from the RTP stream).
 When RFC 2833 (4) is selected, the device:
a. Negotiates RFC 2833 payload type using local and
remote SDPs.
b. Sends DTMF packets using RFC 2833 payload type
according to the payload type in the received SDP.
c. Expects to receive RFC 2833 packets with the same
payload type as configured by the parameter
RFC2833PayloadType.
d. Removes DTMF digits in transparent mode (as part
of the voice stream).
 When TxDTMFOption is set to 0, the RFC 2833 payload
type is set according to the parameter
RFC2833PayloadType for both transmit and receive.
 If an ISDN phone user presses digits (e.g., for interactive
voice response / IVR applications such as retrieving
voice mail messages), ISDN Information messages
received by the device for each digit are sent in the voice
channel to the IP network as DTMF signals, according to
the settings of the TxDTMFOption parameter.

You can also configure this functionality per specific calls,
using IP Profiles (IpProfile_FirstTxDtmfOption and
IpProfile_SecondTxDtmfOption). For configuring IP
Profiles, see ''Configuring IP Profiles'' on page
332.