%% You should probably cite draft-ietf-sip-connected-identity instead of this I-D.
@techreport{elwell-sip-connected-identity-01,
    number =    {draft-elwell-sip-connected-identity-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-elwell-sip-connected-identity/01/},
    author =    {John Elwell},
    title =     {{Connected Identity in the Session Initiation Protocol (SIP)}},
    pagetotal = 19,
    year =      2006,
    month =     feb,
    day =       22,
    abstract =  {Because of retargeting of a dialog-forming request, the UAS can have a different identity from that in the To header. This document provides a means for that UA 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. The same mechanism can be used to indicate a change of identity during a dialog, e.g., because of some action in a PSTN behind a gateway. This work is being discussed on the sip@ietf.org mailing list.},
}