I am gound flags for rtpproxy_manage(which help external (behind NAT) UA
registerd on Kamailio call to Echo() test extension on Asterisk - it is
"cwie". But for Peer-to-Peerm, registered on Kamailio and working though
Asterisk dialplan, it must be rtpproxy_manage("cwii").
Thanks to author of this example of kamailio.cfg
https://github.com/xlab1/sipfe_kamailio/blob/master/kamailio.cfg
And from Kamailio documentation for rtpproxy_offer([flags [, ip_address]]):
-
*c* - flags to change the session-level SDP connection (c=) IP if
media-description also includes connection information.
-
*w* - flags that for the UA from which message is received, support
symmetric RTP must be forced.
Hope I am understand what I do =)
Thank you all for speaking with me! I'll be back... ASAP