AudioCodes Mediant 800B User Manual page 403

User's Manual
Parameter
Is DTMF Used
[IpProfile_IsDTMFUsed]
First Tx DTMF Option
first-tx-dtmf-option
[IpProfile_FirstTxDtmfOption]
Version 7.0
an unencrypted call is established. The device accepts incoming
calls received from the SIP entity that don't include encryption
information.

[1] Mandatory = The device initiates encrypted calls to this SIP
entity, but if negotiation of the cipher suite fails, the call is
terminated. The device rejects incoming calls received from the
SIP entity that don't include encryption information.

[2] Disable = This SIP entity does not support encrypted calls
(i.e., SRTP).

[3] Preferable - Single Media = The device sends SDP with a
single media ('m=') line only (e.g., m=audio 6000 RTP/AVP 4 0
70 96) with RTP/AVP and crypto keys. The SIP entity can
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).
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19. Coders and Profiles
Description
Mediant 800B Gateway and E- SBC