AudioCodes Mediant 800 User Manual page 466

CHAPTER 19 Coders and Profiles
Parameter
'RFC 2833 DTMF Payload
Type'
sbc-2833dtmf-payload
[IpProfile_
SBC2833DTMFPayloadType]
'Alternative DTMF Method'
sbc-alternative-dtmf-
method
[IpProfile_
SBCAlternativeDTMFMethod]
'Send Multiple DTMF Methods'
sbc-send-multiple-dtmf-
methods
[IPProfile_
SBCSupportMultipleDTMFMeth
ods]
Mediant 800 Gateway & E-SBC | User's Manual
Description
■ [2] Disallow = The device removes RFC 2833 from the
incoming offer.
Note: If the device interworks between different DTMF
methods and one of the methods is in-band DTMF packets
(in RTP), detection and generation of DTMF methods
requires DSP resources. However, RFC 2833 to SIP INFO
does not require DSP resources.
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).
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 DTMF
method configured by this parameter 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
(in RTP), detection and generation of DTMF methods
requires DSP resources. However, RFC 2833 to SIP INFO
does not require DSP resources.
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.
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