<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello Sergiu,<div class=""><br class=""></div><div class="">Thanks for your suggestions. Regarding option b) to put SAVP and AVP, it is not possible with rtpengine at the moment (see <a href="https://github.com/sipwise/rtpengine/issues/435" class="">https://github.com/sipwise/rtpengine/issues/435</a>). Also using OSRTP does not work with Zoiper. The only idea to make it compatible which I have is to add an SRTP/RTP option to the server-side subscriber configuration. Depending on this setting I can put either RTP/SAVP or RTP/AVP in the INVITE. The drawback ist that it only works when server and client configuration is matching. </div><div class=""><br class=""></div><div class="">Thanks and regards</div><div class=""><br class=""></div><div class="">Markus</div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">Am 19.04.2021 um 14:35 schrieb Sergiu Pojoga <<a href="mailto:pojogas@gmail.com" class="">pojogas@gmail.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi Marcus,<div class=""><br class=""></div><div class="">Can't say for Zoiper, but I've worked this case with Counterpath (sadly for Canada - it is no more, has been acquired by Alianza). <div class=""><br class=""></div><div class="">Anyhow, the final conclusion at the time was: <i class="">The client is correct to expect that this is the same INVITE request that took different paths to the target (as indicated by the different branch IDs) - and thus correct to reject it with a 482 because the requests are not identical in content. <a href="https://tools.ietf.org/html/rfc3261#section-8.2.2.2" class="">https://tools.ietf.org/html/rfc3261#section-8.2.2.2</a> states what should occur if there is no To tag</i></div><div class=""><br class=""></div><div class="">The suggested solutions were: </div><div class="">a) increment CSeq - impossible to do with a proxy</div><div class="">b) send both SAVP and AVP lines in the SDP of the original INVITE. If media encryption is set to mandatory and SIP TLS is enabled then the SAVP offer would be accepted. If media encryption is off in Bria, then the AVP offer would be accepted</div></div><div class=""><br class=""></div><div class="">Good luck.</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 19, 2021 at 3:55 AM Markus Bönke <<a href="mailto:mb@tenios.de" class="">mb@tenios.de</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: break-word;" class=""><div class="">Hello NG,</div><div class=""><br class=""></div><div class="">I saw the following threads discussing how to switch to RTP when a client does not support SRTP. </div><div class=""><br class=""></div><a href="https://lists.kamailio.org/pipermail/sr-users/2018-May/101341.html" target="_blank" class="">https://lists.kamailio.org/pipermail/sr-users/2018-May/101341.html</a><div class=""><a href="https://lists.kamailio.org/pipermail/sr-users/2016-September/094457.html" target="_blank" class="">https://lists.kamailio.org/pipermail/sr-users/2016-September/094457.html</a></div><div class=""><br class=""></div><div class="">There are some issues with Zoiper and Bria which also persist in the latest versions. Has anyone got it work with Zoiper and Bria? </div><div class=""><br class=""></div><div class="">Thanks and regards</div><div class=""><br class=""></div><div class="">Markus<br class=""><div class=""><br class=""></div></div></div>_______________________________________________<br class="">
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