I have a VitalPBX and a few phones (Grandstreams and Yealinks) connected to it, for some reason when one of the phones hangs up a call I cannot see it in the “asterisk -rvvv” output, neither is the call ending. I have never met this issue before and have no idea why this is happening.
Note that if the hang ups are coming from the outside it works.
I tried to do the same with a Fanvil IP Phone and it worked well, I’ll try to figure out why phones from these two other brands are not sending hang up notice.