AudioCodes Mediant 1000B User Manual page 393

User's Manual
Parameter
Is DTMF Used
[IpProfile_IsDTMFUsed]
First Tx DTMF Option
first-tx-dtmf-option
[IpProfile_FirstTxDtmfOption]
Version 7.0
respond with SRTP or RTP parameters:

If the SIP entity does not support SRTP, it uses RTP and
ignores the crypto lines.

If the device receives an SDP offer with a single media
(as shown above) from the SIP entity, it responds with
SRTP (RTP/SAVP) if the EnableMediaSecurity
parameter is set to 1. If SRTP is not supported (i.e.,
EnableMediaSecurity is set to 0), it responds with RTP.

If two 'm=' lines are received in the SDP offer, the device
prefers the SAVP (secure audio video profile), regardless
of the order in the SDP.
Notes:

The parameter is applicable only when the
EnableMediaSecurity parameter is set to 1.

The corresponding global parameter is
MediaSecurityBehaviour.
Enables DTMF signaling.

[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.
Notes:

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.
393
19. Coders and Profiles
Description
Mediant 1000B Gateway and E- SBC