Hello everyone. I have setup Kamailio as an SBC for Microsoft Teams following 
the link provided in the documentation 
https://skalatan.de/en/blog/kamailio-sbc-teams and everything was working 
perfectly until recently. The problem I am having is that starting a few weeks 
back, Kamailio starting showing the errors below. These errors appear without 
the need to do anything, meaning without making any sort of call, even with 
Kamailio sitting idle. Since the problem started I looked around and found out 
that the issue seems to come from the fact that sometimes the SIP Options 
request being sent to microsoft is not being answered.
I have configured everything following the guide and I did not make any changes 
to Kamailio since then that might have caused this issue.
I am using kamailio with docker, version 5.7.2-bullseye.
Thank you very much.

31(37) ERROR: <core> [core/tcp_main.c:4675]: tcpconn_main_timeout(): connect 
52.114.76.76:5061 failed (timeout) 
9(15) ERROR: <core> [core/tcp_main.c:1321]: tcp_do_connect(): connect 
52.114.76.76:5061 failed Cannot assign requested address
9(15) ERROR: <core> [core/tcp_main.c:1324]: tcp_do_connect(): connect 
52.114.76.76:5061: (99) Cannot assign requested address
9(15) ERROR: <core> [core/tcp_main.c:1456]: tcpconn_finish_connect(): 
52.114.76.76:5061: tcp_do_connect for 0x7f623d0e91a8 failed
9(15) ERROR: <core> [core/tcp_main.c:2112]: tcp_send(): 52.114.76.76:5061: 
tcpconn_finish_connect(0x7f623d0e91a8) failed
9(15) ERROR: tm [../../core/forward.h:292]: msg_send_buffer(): tcp_send failed
9(15) ERROR: tm [uac.c:688]: send_prepared_request_impl(): Attempt to send to 
precreated request failed
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