AudioCodes Mediant 1000 User Manual page 405

User's Manual
Parameter
Jitter Compensation
sbc-jitter-compensation
[IpProfile_SBCJitterCompensa
tion]
SDP Handle RTCP
sbc-sdp-handle-rtcp
[IpProfile_SBCSDPHandleRT
CPAttribute]
RTCP Feedback
sbc-rtcp-feedback
[IPProfile_SBCRTCPFeedbac
Version 7.2
'a=recvonly' or 'a=inactive' in the INVITE SDP).

[2] Generate only if RTP Active = Generates RTCP packets only
during active RTP periods. In other words, the device does not
generate RTCP when there is no RTP traffic (such as when a call
is on hold).
Note: The corresponding global parameter is SBCRTCPMode.
Enables the on-demand jitter buffer for SBC calls. The jitter buffer
can be used when other functionality such as voice transcoding are
not done on the call. The jitter buffer is useful when incoming
packets are received at inconsistent intervals (i.e., packet delay
variation). The jitter buffer stores the packets and sends them out at
a constant rate (according to the coder's settings).

[0] Disable (default)

[1] Enable
Note:

The jitter buffer parameters, 'Dynamic Jitter Buffer Minimum
Delay' (DJBufMinDelay) and 'Dynamic Jitter Buffer Optimization
Factor' (DJBufOptFactor) can be used to configure minimum
packet delay only when transcoding is employed.

This functionality may require DSP resources. For more
information, contact your AudioCodes sales representative.
Enables the interworking of the RTCP attribute, 'a=rtcp' (RTCP) in
the SDP, for the SIP entity associated with the IP Profile. The RTCP
attribute is used to indicate the RTCP port for media when that port
is not the next higher port number following the RTP port specified in
the media line ('m=').
The parameter is useful for SIP entities that either require the
attribute or do not support the attribute. For example, Google
Chrome and Web RTC do not accept calls without the RTCP
attribute in the SDP. In Web RTC, Chrome (SDES) generates the
SDP with 'a=rtcp', for example:
m=audio 49170 RTP/AVP 0
a=rtcp:53020 IN IP6
2001:2345:6789:ABCD:EF01:2345:6789:ABCD

[0] Don't Care = (Default) The device forwards the SDP as is
without interfering in the RTCP attribute (regardless if present or
not).

[1] Add = The device adds the 'a=rtcp' attribute to the outgoing
SDP offer sent to the SIP entity if the attribute was not present in
the original incoming SDP offer.

[2] Remove = The device removes the 'a=rtcp' attribute, if present
in the incoming SDP offer received from the other SIP entity,
before sending the outgoing SDP offer to the SIP entity.
Note: As the RTCP attribute has been defined by the WebRTC
standard as mandatory, the support is important for deployments
implementing WebRTC. For more information on WebRTC, see
WebRTC.
Enables RTCP-based feedback indication in outgoing SDPs sent to
the SIP entity associated with the IP Profile.
The parameter supports indication of RTCP-based feedback,
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19. Coders and Profiles
Description
Mediant 1000B Gateway & E-SBC