[SR-Users] Problem with Teams and Kamailio and calls hangup after 6 seconds

[sip user]

Hi, I'm trying to connect Teams with Kamailio.
I'd configured and it works, but a few days ago, calls Teams to kamailio no
works.

I call from Teams and in Kamailio I see the call, ring the extensions in
Kamailio, but after 6 seconds, the call hangup.

I received the INVITE, I send Trying and 200 Ok, but never received ACK
from Teams.

Anyone knows how can I check it?

I have configurated SBC in teams like
https://skalatan.de/en/blog/kamailio-sbc-teams

Thanks
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