AudioCodes Mediant 1000 User Manual page 424

Parameter
[IpProfile_IsDTMFUsed]
First Tx DTMF Option
first-tx-dtmf-option
[IpProfile_FirstTxDtmfOption]
Second Tx DTMF Option
second-tx-dtmf-option
[IpProfile_SecondTxDtmfOptio
n]
Rx DTMF Option
rx-dtmf-option
[IpProfile_RxDTMFOption]
Gateway Fax and Modem
Fax Signaling Method
User's Manual

[0] Disable = (Default)

[1] Enable
Defines the first preferred transmit DTMF negotiation method.

[0] Not Supported = No negotiation - DTMF digits are sent
according to the parameters DTMFTransportType and
RFC2833PayloadType (for transmit and receive).

[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 the Cisco
format.

[4] RFC 2833 = (Default) The device:

negotiates RFC 2833 payload type using local and remote
SDPs.

sends DTMF packets using RFC 2833 payload type
according to the payload type in the received SDP.

expects to receive RFC 2833 packets with the same payload
type as configured by the parameter RFC2833PayloadType.

removes DTMF digits in transparent mode (as part of the
voice stream).

[5] INFO (Korea) = Sends DTMF digits according to the Korea
Telecom format.
Note:

When out-of-band DTMF transfer is used ([1], [2], [3], or [5]), the
DTMFTransportType parameter is automatically set to 0 (DTMF
digits are removed from the RTP stream).

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 parameter.

The corresponding global parameter is FirstTxDTMFOption.
Defines the second preferred transmit DTMF negotiation method.
For a description, see IpProfile_FirstTxDtmfOption (above).
Note: The corresponding global parameter is
SecondTxDTMFOption.
Enables the device to declare the RFC 2833 'telephony-event'
parameter in the SDP.

[0] Not Supported

[3] Supported (default)
The device is always receptive to RFC 2833 DTMF relay packets.
Thus, it is always correct to include the 'telephony-event' parameter
by default in the SDP. However, some devices use the absence of
the 'telephony-event' in the SDP to decide to send DTMF digits in-
band using G.711 coder. If this is the case, set the parameter to 0.
Note: The corresponding global parameter is RxDTMFOption.
Defines the SIP signaling method for establishing and transmitting a
424
Mediant 1000B Gateway & E-SBC
Description
Document #: LTRT-27045