Phone Number - Free Vapi Sip
When an incoming call is sent to a SIP URI containing only numbers, or a combination of numbers and characters, the call fails. However, if the URI contains only alphabetic characters, the call succeeds.
For example:
• sip:number-4165551234@sip.vapi.ai results in a failed call, even though no credentials are configured. The system responds with:
X-Reason: Invalid credentials
• sip:number@sip.vapi.ai works without any issues, despite the same lack of credentials.
This suggests that the presence of numeric characters in the URI may be triggering credential checks or authentication requirements.
For example:
• sip:number-4165551234@sip.vapi.ai results in a failed call, even though no credentials are configured. The system responds with:
X-Reason: Invalid credentials
• sip:number@sip.vapi.ai works without any issues, despite the same lack of credentials.
This suggests that the presence of numeric characters in the URI may be triggering credential checks or authentication requirements.
