3.4.4.3 Notification that a RTP or RTCP Packet is Ready to Send
This event can occur when the value of the State variable is Streaming.
The DMS MUST send the RTP or RTCP packet according to the rules in [DLNA] guideline 7.4.85.
The following additional rules apply for RTP packets:
If the Extension-info variable specifies one or more ASF Payload Extension Systems for the stream that the RTP packet belongs to, then the RTP packet MUST include the ASF Payload Extension System extension defined in section 2.2.1.1.
The Extension Data field in the RTP packet MUST include the ASF Payload Extension System data for each ASF Payload Extension System in the same order as the ASF Payload Extension Systems are listed in the Extension-info variable.