Hey everyone 👋 I'm currently trying to integrate Vodia PBX with Vapi, but I'm running into an issue with the SIP connection. Here’s what I’ve done so far: - Used the gateway address from Vodia - Entered the correct authentication details - Successfully added the phone number to my Vapi account - Successfully created the number via the API However, when I try to use the Phonenumber ID, I get an error in the Vapi call logs saying: "SIP connection failed". Has anyone here successfully integrated Vodia PBX or knows what might be causing this? Appreciate any help 🙏

Hi there! 👋 Sorry to hear you're having trouble with the SIP connection when integrating with Vapi. I don't have specific information about Vodia PBX integration, but I can definitely help with general SIP connection troubleshooting that should apply to your situation. Here are some troubleshooting steps that might help resolve your "SIP connection failed" error: 1. **Verify SIP URI Format**: Ensure that the SIP URI in the

sipUri

attribute within the

forwardingPhoneNumbers

array is correctly formatted and points to a valid SIP address. The format should be

sip:user@domain

[according to Vapi documentation](https://docs.vapi.ai/advanced/sip). 2. **Check Vapi SIP Server Settings**: Make sure you're using

sip.vapi.ai

as the SIP server address. All requests should be sent to this domain, not to IP addresses (which are blocked) [according to Vapi documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1329037681908383794). 3. **Verify Authentication**: Vapi expects authentication credentials using the Authorization header in SIP. The username must be your SIP username, and the password can be anything except "test" [according to support information](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334238882660618250). 4. **Network Configuration**: Verify that your network allows traffic on the SIP protocol and that any firewalls or NATs are configured to allow SIP messages to pass through [according to troubleshooting guides](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336713212233515089). 5. **SIP REFER Handling**: Confirm that your system is set up to handle SIP REFER messages, as Vapi uses SIP REFER to transfer calls [according to Vapi documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336713212233515089).

Wow, Vodia - hadn't heard that name in years. What is your trunk configuration in Vodia? Can you please share it.

checking if this is resolved/solved for you?

Not resolved, still looking for an answer.

Hey! To help track down this issue, could you share: - The call ID This would really help us figure out what went wrong!