13244: Dial: No SIP Authorization

This warning is returned when you try to place a SIP call with <Dial><Sip> or the Calls API from an account that is not authorized to use SIP calling.

• You attempted to dial a SIP URI with <Dial><Sip> from an account that does not have SIP calling access.
• You attempted to create an outbound SIP call with the Calls API by setting the To parameter to a SIP URI on an account that is not enabled for SIP.

• Place the SIP call from a Twilio account that has SIP calling enabled.
• Review your SIP call flow and retry with the supported Programmable Voice SIP configuration after SIP access is available.
• If the destination SIP endpoint requires authentication, pass valid credentials by using the <Sip> username and password attributes or the Calls API SipAuthUsername and SipAuthPassword parameters.

• TwiML Voice: <Sip>
• Making SIP Calls
• Use SIP with Twilio Voice