AudioCodes E-SBC User Manual page 450

CHAPTER 19 Coders and Profiles
Parameter
'Jitter Compensation'
sbc-jitter-compensation
[IpProfile_
SBCJitterCompensation]
'SDP Handle RTCP'
sbc-sdp-handle-rtcp
[IpProfile_
SBCSDPHandleRTCPAttribut
e]
'RTCP Feedback'
sbc-rtcp-feedback
[IPProfile_
SBCRTCPFeedback]
Mediant 1000 Gateway & E-SBC | User's Manual
Description
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 the sales representative of
your purchased device.
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.
Enables RTCP-based feedback indication in outgoing
SDPs sent to the SIP entity associated with the IP Profile.
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