User's Manual 446 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
Parameter Description
Note: If you enable direct media for the IP Profile, make sure that your
Media Realm provides sufficient ports, as media may traverse the
device for mid-call services (e.g., call transfer).
RFC 2833 Mode
sbc-rfc2833-behavior
[IpProfile_SBCRFC2833Beh
avior]
Defines the handling of RFC 2833 SDP offer-answer negotiation for
the SIP entity associated with the IP Profile.
[0] As is = (Default) The device does not intervene in the RFC 2833
negotiation.
[1] Extend = Each outgoing offer-answer includes RFC 2833 in the
offered SDP. The device adds RFC 2833 only if the incoming offer
does not include RFC 2833.
[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 (RFC 2833), detection
and generation of DTMF methods requires DSP resources.
RFC 2833 DTMF Payload
Type
sbc-2833dtmf-payload
[IpProfile_SBC2833DTMFPa
yloadType]
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_SBCAlternativeDT
MFMethod]
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_SBCSupportMultip
leDTMFMethods]
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
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