Version 7.2 433 Mediant 1000B Gateway & E-SBC
User's Manual 20. Coders and Profiles
Parameter Description
If the device interworks between different DTMF methods and
one of the methods is in-band DTMF packets (RFC 2833),
detection and generation of DTMF methods requires DSP
resources.
RFC 2833 DTMF Payload
Type
sbc-2833dtmf-payload
[IpProfile_SBC2833DTMFPayl
oadType]
Defines the payload type of DTMF digits for the SIP entity associated
with the IP Profile. This enables the interworking of the DTMF
payload type for RFC 2833 between different SBC call legs. For
example, if two entities require different DTMF payload types, the
SDP offer received by the device from one entity is forwarded to the
destination entity with its payload type replaced with the configured
payload type, and vice versa.
The value range is 0 to 200. The default is 0 (i.e., the device
forwards the received payload type as is).
Alternative DTMF Method
sbc-alternative-dtmf-method
[IpProfile_SBCAlternativeDTM
FMethod]
The device's first priority for DTMF method at each leg is RFC 2833.
Thus, if the device successfully negotiates RFC 2833 for the SIP
entity associated with the IP Profile, the chosen DTMF method for
this leg is RFC 2833. When RFC 2833 negotiation fails, the device
uses the parameter to define the DTMF method for the leg.
[0] As Is = (Default) The device does not attempt to interwork any
special DTMF method.
[1] In Band
[2] INFO - Cisco
[3] INFO - Nortel
[4] INFO - Lucent = INFO, Korea
Note:
If the device interworks between different DTMF methods and
one of the methods is in-band DTMF packets (RFC 2833),
detection and generation of DTMF methods requires DSP
resources.
Send Multiple DTMF Methods
sbc-send-multiple-
dtmf-methods
[IPProfile_SBCSupportMultipl
eDTMFMethods]
Enables the device to send DTMF digits out-of-band (not with audio
stream) using both the SIP INFO and RFC 2833 methods for the
same call on the leg to which this IP Profile is associated. The RFC
2833 method sends out-of-band DTMF digits using the RTP protocol
while the SIP INFO method sends the digits using the SIP protocol.
[0] Disable = (Default) The device sends DTMF digits using only
one method (either SIP INFO, RFC 2833, or in-band).
[1] Enable = The device sends DTMF digits using both methods -
SIP INFO and RFC 2833.
If you have enabled the parameter, you can also configure the
device
to stop sending DTMF digits using the SIP INFO method if the
device receives a SIP re-INVITE (or UPDATE) from the SIP entity to
where the SIP INFO is being sent (and keep sending the DTMF
digits using the RFC 2833 method). This is done using AudioCodes
proprietary SIP header X-AC-Action and a Message Manipulation
rule (inbound) to instruct the device to switch to a different IP Profile
that is configured to disable the sending of DTMF digits using both
methods (i.e., 'Send Multiple DTMF Methods' is configured to
Disable):
X-AC-Action: 'switch-profile;profile-name=<IP Profile Name>'
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