Freeswitch stops making outgoing calls with the reason Error Cause: 55 [UNKNOWN] - where to look for the problem?

Question

Telephony

Actually the problem itself is indicated in the question. After starting FreeSwitch, it works normally... for a while. Previously, up to several days, now less than 24 hours. After this time, problems with making outgoing calls begin, and regardless of the provider used. All attempts end up like this:

...
Remote Reason: 55
Channel sofia/external/49603179100 entering state [terminated][403]
Hangup sofia/external/49603179100 [CS_CONSUME_MEDIA] [UNKNOWN]
...
Originate Resulted in Error Cause: 55 [UNKNOWN]
...

Reloading the profile (sofia profile external restart) completely cures for a while, but not for long.
Need ideas where to look! Thanks in advance!

Answer 1

judging by the "entering state [terminated][403]"
INVITE is sent with the data of one gateway to the IP of another gateway , the
problem has long been known Strange behavior of the Friswitch