13259: Invalid CallerDisplayName

Twilio returns this warning when the value you supply for the callerDisplayName attribute is invalid. After you trim leading and trailing spaces, the value must contain 2–255 printable characters and no control characters.

• The value is shorter than 2 characters, longer than 255 characters, or contains only spaces.
• The value includes a control character (for example, a line break or a tab).

• Provide a value that contains 2–255 printable characters and no control characters.
• Remove control characters, such as line breaks and tabs, from the value.

• TwiML Voice <Dial> noun
• TwiML Voice <Sip> noun
• TwiML for Voice