I have a customer that is on Starlink internet and we are attempting to set up SIP trunks and move them off their PRI.
Outbound calling is working ok but customer had to enable SIP ALG on their Fortinet firewall to get that working. Seems odd as every other time, we have always disabled SIP ALG.
The issue though is with incoming. When we make a test call, the phone will ring, but when we try to answer it, the phone keeps ringing and there is no audio. You hang up and grab the second ringing call, you can answer no problem. For some reason it is like the SIP provider is trying to send the call twice but only the second call is a valid call. They say the PBX is not responding to the first INVITE request.
Not sure if it is a firewall, phone system or provider issue at this point.
Outbound calling is working ok but customer had to enable SIP ALG on their Fortinet firewall to get that working. Seems odd as every other time, we have always disabled SIP ALG.
The issue though is with incoming. When we make a test call, the phone will ring, but when we try to answer it, the phone keeps ringing and there is no audio. You hang up and grab the second ringing call, you can answer no problem. For some reason it is like the SIP provider is trying to send the call twice but only the second call is a valid call. They say the PBX is not responding to the first INVITE request.
Not sure if it is a firewall, phone system or provider issue at this point.