Optimum Video Quality
The following SBC Core video configuration best practices are intended to ensure optimum video quality.
Enable RTCP relay on both legs to ensure video RTCP feedback messages are relayed..
Enable SIP INFO relay and transparency depending upon the SBC release version.
Prior to 4.2.3R0 release: Enable SIP INFO relay and transparency for unknown bodies to allow relay of the FAST UPDATE SIP INFO
Effective 4.2.3R0 release and onwards: Enable SIP INFO relay and transparency for media_control+xml body to allow relay of the FAST UPDATE SIP INFO.
If the SBC receives fragmented media packets (audio, video, FECC, and BFCP) beyond MTU size, it will increment an error counter in SYS log. An example SYS log entry is shown below.
To rectify this, adjustments must be made at the endpoints.
Late Media Support
convert” mode for
lateMediaSupport only applies to Audio; for multimedia sessions, enable “
CLI syntax to enable pass-through (see sipTrunkGroup media (CLI) for configuration details):