FreePBX to VAPI SIP Integration Issue
Hi everyone! 
I'm trying to configure FreePBX 17 to connect with VAPI's SIP URI service (**@sip.vapi.ai) but running into challenges.
What I've tried:
Created a custom SIP trunk in FreePBX
Set up a direct dialplan in extensions_custom.conf
Added PJSIP endpoint configurations
Created outbound routes with prefix 800
The issue:
When dialing 800+extension, I get "all circuits busy" errors. From logs, I can see FreePBX is trying to establish a traditional trunk connection expecting VAPI to register, but from what I understand, VAPI doesn't perform registration as it functions more like a SIP destination server.
Questions:
Has anyone successfully connected FreePBX to VAPI?
Is a middle SIP proxy (like Kamailio) absolutely necessary, or is there a way to configure FreePBX directly?
Any specific configuration tips for making this work without adding additional components?
Any help would be greatly appreciated!
I'm trying to configure FreePBX 17 to connect with VAPI's SIP URI service (**@sip.vapi.ai) but running into challenges.What I've tried:
Created a custom SIP trunk in FreePBX
Set up a direct dialplan in extensions_custom.conf
Added PJSIP endpoint configurations
Created outbound routes with prefix 800
The issue:
When dialing 800+extension, I get "all circuits busy" errors. From logs, I can see FreePBX is trying to establish a traditional trunk connection expecting VAPI to register, but from what I understand, VAPI doesn't perform registration as it functions more like a SIP destination server.
Questions:
Has anyone successfully connected FreePBX to VAPI?
Is a middle SIP proxy (like Kamailio) absolutely necessary, or is there a way to configure FreePBX directly?
Any specific configuration tips for making this work without adding additional components?
Any help would be greatly appreciated!
