Latest distro, asterisk 11.
I have this issue where someone/thing dials a number here, and it leaves a long, like 50 minutes “message”. When you listen to the voicemail, it is a fax machine.
I have tried to prevent this by detecting faxes on inbound routes, and then terminating the call, however, it did not help.
I also added SIP settings as follows, but did not help either:
So, I also blacklisted the offending numbers, but more keep ‘popping up’.
Any idea how I can prevent these runaway calls? Thanks in advance.