Obtaining and Using Globally Routable User Agent URIs (GRUUs) in the Session Initiation Protocol (SIP)
John Rosenberg · 2009
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. Status of This MemoThis document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements.Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol.Distribution of this memo is unlimited.