Session Initiation Protocol (SIP) URIs for Applications such as Voicemail and Interactive Voice Response (IVR). - Cullen Jennings; François Audet; John Elwell (RFC, 2006)

Interworking between the Session Initiation Protocol (SIP) and QSIG. - John Elwell; Frank Derks; Patrick Mourot; Olivier Rousseau (RFC, 2006)

Connected Identity in the Session Initiation Protocol (SIP). - John Elwell (RFC, 2007)

Updates to Asserted Identity in the Session Initiation Protocol (SIP). - John Elwell (RFC, 2010)

Requirements for Multiple Address of Record (AOR) Reachability Information in the Session Initiation Protocol (SIP). - John Elwell; Hadriel Kaplan (RFC, 2010)

Session Initiation Protocol (SIP) User Agent Configuration. - Scott Lawrence; John Elwell (RFC, 2010)