I’m running FreePBX 184.108.40.206 with a Yealink phone connected. Basically everything works fine, but sometimes when I try to make a call I only get “All Circuits are Busy”. If I simply wait for some minutes and try it again, it works again as usual. When the problem occurs, there are definitely no other calls in parallel which could make all lines busy.
Do you have any idea what the problem could be or where I could start with the analysis?
The short log from the call is available here:
In the log you can find the following line which is the only ERROR which can be found in all my logs:
res_pjsip_header_funcs.c: No headers had been previously added to this session.
What does this error tell me? Could this be the root cause?