13243: Dial->SIP: Invalid SIP URI

This warning occurs when the value in the <Sip> noun is not formatted as a valid SIP URI. Provide a valid SIP URI that is fewer than 255 characters.

• The <Sip> noun does not contain a valid SIP URI such as sip:jack@example.com.
• The SIP URI is longer than 255 characters.
• SIP URI parameters or custom headers were appended with invalid syntax, which makes the full SIP URI invalid.

• Update the <Sip> value to a valid SIP URI such as sip:jack@example.com.
• Shorten the SIP URI so the full value stays under 255 characters.
• If you need to set transport, add it as a SIP URI parameter such as sip:jack@example.com;transport=tcp or sip:jack@example.com;transport=tls.
• If you need to add custom headers, append them after ? and encode reserved characters as needed.

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