I am running FreePBX and using flowroute as the SIP provider. I am unable to receive calls. We have a Fortigate firewall and I have already disabled SIP ALG. When I place a call to the phone system all I get is a busy signal.
hi,
when we there is no audio or calls dropping in Asterisk that is almost always because of NAT or other net similar network issues.
kindly let me know a little more about your system so i can better diagnose the issue.
regards,