Thinks 180 Ringing messages do not contain SDP. Some misunderstanding present here Sergey On Tue, Aug 18, 2020 at 9:51 AM Ildar Mukhametzhanov &lt;im(a)voice-on.de <mailto:im@voice-on.de>> wrote: Hello! __ __ Decrypting SRTP with Kamailio + rtpengine.____ Hello! I have a task to decrypt SRTP for a legacy switch which doesn’t support it.____ Simply adding rtpengine_manage("RTP/AVP") didn’t help. SDP converted from SRTP to RTP while proxying INVITE to legacy switch, but 180 Ringing wasn’t converted back to SRTP.____ Little more detailed config snippet: __ __ route[RELAY] {____ ...____ if (is_method("INVITE")) { __ __ if ($rd=~$var(switch_ip_mask)) {____ rtpengine_manage("RTP/AVP");____ } else {____ rtpengine_manage();____ }____ ...____ } __ __ Could someone please advise typical scenarios to achieve it, I suppose the task is pretty standard. __ __ Thank you in advance! __ __ __ __ _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users