VOLTE: Unable to establish calls between two UEs using new PCSCF about docker_open5gs HOT 4 CLOSED

Glad it got sorted out. If i recall correctly usage of TVP or UDP is in some RFC. Usually TCP is used when MTU exceed a certain threshold around 1300 bytes.

Let me know if you face further issues. Looking forward to seeing opensips IMS getting integrated here.

from docker_open5gs.

The only difference I spotted between OpenSIPS's and Kamailio's behavior is that for the failed scenario (OpenSIPS P-CSCF), the PRACK is received over UDP, while for the successful scenario (Kamailio P-CSCF), the PRACK comes over TCP. However, I couldn't find any references in the specifications on what could lead to this behavior, and how an UE decides when to use UDP and when TCP. Perhaps understanding this is a good start, but I couldn't find any reference on this.

Thanks a lot!

from docker_open5gs.

I've managed to sort this out - the problem was that I was not paying attention to the media, and I was not using the Rx interface to allow the media flow. Sorting this out fixed the issue, and now I have a fully working call.
Thanks a lot for your work!

from docker_open5gs.

Indeed, having this sorted out, I now have a fully working PoC, that is derived from this repository (thanks a lot for your work!), that I will be presenting next week at the OpenSIPS Summit Workshop. As soon as that finishes, I would like to wrap everything up and open a PR for it.

from docker_open5gs.