AudioCodes Mediant 1000

Version 7.2 403 Mediant 1000B Gateway & E-SBC
User's Manual 19. Coders and Profiles
Parameter Description
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_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.
SDP Ptime Answer
sbc-sdp-ptime-ans
[IpProfile_SBCSDPPtimeAns
wer]
Defines the packetization time (ptime) of the coder in RTP packets
for the SIP entity associated with the IP Profile. This is useful when
implementing transrating.
 [0] Remote Answer = (Default) Use ptime according to SDP
answer.
 [1] Original Offer = Use ptime according to SDP offer.
 [2] Preferred Value= Use preferred ptime for negotiation, if
configured by the 'Preferred Ptime' parameter.
Preferred Ptime
sbc-preferred-ptime
[IpProfile_SBCPreferredPTim
e]
Defines the packetization time (in msec) for the SIP entity associated
with the IP Profile if the 'SBC SDP Ptime Answer' parameter (see
above) is set to Preferred Value.
The valid range is 0 to 200. The default is 0 (i.e., preferred ptime is
not used).
Use Silence Suppression
sbc-use-silence-supp
[IpProfile_SBCUseSilenceSup
p]
Defines silence suppression support for the SIP entity associated
with the IP Profile
 [0] Transparent = (Default) Forward as is.
 [1] Add = Enable silence suppression for each relevant coder
listed in the SDP.