Unable to Use GHL SIP Trunk Credentials in Vapi

Issue:
I am trying to take the SIP trunk credentials from my GHL (LeadConnector) account and configure them in Vapi so I can make and receive calls, but it is not working.

Details:

I have the SIP Server URL, username, and password from GHL.

I attempted to set up a SIP trunk in Vapi using this information.

Registration fails, and I am unable to make or receive calls.
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