4.7 TURN Server Bandwidth Notification
On receipt of the TURN server bandwidth via the TURN protocol, the host informs the other host of the bandwidth information.
Figure 13: Message exchange for TURN Server bandwidth extension
Host2 sends an RTCP packet with a TURN server bandwidth policy extension to Host1. Upon receiving this extension, Host1 asks the encoder to generate the next frame beneath the TURN server bandwidth constraints to be sent to Host2.