I addition to it, taking a look to /var/log/messages. I got:
…
Jul 9 17:45:47 freepbx kernel: buffer re-sync occur from 3 to 2
Jul 9 17:45:47 freepbx kernel: buffer re-sync occur from 2 to 1
Jul 9 17:45:47 freepbx kernel: buffer re-sync occur from 1 to 0
Jul 9 17:45:47 freepbx kernel: buffer re-sync occur from 0 to 1
…
a lot of buffer re-sync issue and them halt my system.
Looking for more info, some people said: add apci=off noapi at booting and disable C-States en Advanced Power Options in BIOS. I did that and I am getting same messages
You can but take that up with Openvox as your “third party vendor”. It is not part of anything that Asterisk nor Dahdi nor FreePBX has control over.