%% You should probably cite rfc4916 instead of this I-D.
@techreport{ietf-sip-connected-identity-05,
    number =    {draft-ietf-sip-connected-identity-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-sip-connected-identity/05/},
    author =    {John Elwell},
    title =     {{Connected Identity in the Session Initiation Protocol (SIP)}},
    pagetotal = 24,
    year =      2007,
    month =     feb,
    day =       27,
    abstract =  {This document provides a means for a Session Initiation Protocol (SIP) User Agent (UA) that receives a dialog-forming request to supply its identity to the peer UA by means of a request in the reverse direction, and for that identity to be signed by an Authentication Service. Because of retargeting of a dialog-forming request (changing the value of the Request-URI), the UA that receives it (the User Agent Server, UAS) can have a different identity from that in the To header field. The same mechanism can be used to indicate a change of identity during a dialog, e.g., because of some action in the Public Switched Telephone Network (PSTN) behind a gateway. This document normatively updates RFC 3261 (SIP). {[}STANDARDS-TRACK{]}},
}