Re: [SR-Users] rtpengine - SRTP <> RTP missing a=crypto

Thanks guys! I was definitely just going off the default logging calls saying “new branch to xxx” in MANAGE_BRANCH. I am not intentionally creating separate branches in my config, so I guess it must be 1 branch! Good to know. Branches is another topic I still need to learn a lot more about. Hopefully I can come up with the right config. I will keep working on it and let you know how I go. Thanks, Rhys. From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; on behalf of Matthias Urlichs &lt;matthias(a)urlichs.de&gt; Reply to: "Kamailio (SER) - Users Mailing List" &lt;sr-users(a)lists.kamailio.org&gt; Date: Friday, 4 March 2022 at 2:01 am To: &quot;sr-users(a)lists.kamailio.org&quot; &lt;sr-users(a)lists.kamailio.org&gt; Subject: Re: [SR-Users] rtpengine - SRTP <> RTP missing a=crypto On 03.03.22 14:47, Rhys Hanrahan wrote: Yes, from what I’ve seen in the logs there are multiple branches happening. One between Teams and Kamailio and one between Kamailio and Asterisk. That's just one branch; the incoming call doesn't count. "Real" additional branches are created by calling functions like "append_branch". You should definitely ensure (by adding appropriate logging calls) that "rtpengine_manage" is called exactly once per outgoing application/sdp message, with all requisite arguments(*). Anything else is a recipe for confusion. In my experience that's sufficient(**) to get it all working quite nicely. (*) "trust-address replace-origin replace-session-connection", plus either RTP/AVP or RTP/SAVP (**) unless the opposite end is broken. Right now, for instance, talking to Zoom Europe requires a heap of "SDES-no-RANDOM_CRYPTO_ALGORITHM" arguments, for both incoming and outgoing calls. Discovering that fix was decidedly nontrivial. -- -- regards -- -- Matthias Urlichs