%% You should probably cite rfc5627 instead of this I-D. @techreport{ietf-sip-gruu-15, number = {draft-ietf-sip-gruu-15}, 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-gruu/15/}, author = {Jonathan Rosenberg}, title = {{Obtaining and Using Globally Routable User Agent URIs (GRUUs) in the Session Initiation Protocol (SIP)}}, pagetotal = 40, year = 2007, month = oct, day = 11, abstract = {Several applications of the Session Initiation Protocol (SIP) require a user agent (UA) to construct and distribute a URI that can be used by anyone on the Internet to route a call to that specific UA instance. A URI that routes to a specific UA instance is called a Globally Routable UA URI (GRUU). This document describes an extension to SIP for obtaining a GRUU from a registrar and for communicating a GRUU to a peer within a dialog. {[}STANDARDS-TRACK{]}}, }