Good day.

In all documentation seems bug:

6.1. $rtpstart ^^^^^^^ not "start", but "stat"

Returns the RTP-Statistics from the RTP-Proxy. The RTP-Statistics from the RTP-Proxy are provided as a string and it does contain several packet-counters. The statistics must be retrieved before the session is deleted (before unforce_rtpproxy()).

Example 1.16. $rtpstat-Usage

... append_hf("X-RTP-Statistics: $rtpstat\r\n"); ...