Use of the Call-Info header field can pose a security risk. If a callee fetches the URIs provided by a malicious caller, the callee may be at risk for displaying inappropriate or offensive content, dangerous or illegal content, and so on. Therefore, it is RECOMMENDED that a User Agent only render the information in the Call-Info header field if it can verify the authenticity of the element that originated the header field and trusts that element. This need not be the peer User Agent; a proxy can insert this header field into requests.
purpose=icon, http://jcp.org/duke/; purpose=info
purpose- the new string value of the purpose of this info.
java.text.ParseExceptionwhich signals that an error has been reached unexpectedly while parsing the purpose value.