Carrying Q.850 Codes in Reason Header Fields in SIP (Session Initiation Protocol) Responses. - Roland Jesske; Laura Liess (RFC, 2011)

Completion of Calls for the Session Initiation Protocol (SIP). - Dale R. Worley; Martin Huelsemann; Roland Jesske; Denis Alexeitsev (RFC, 2013)

Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3GPP. - Roland Jesske; Keith Drage; Christer Holmberg (RFC, 2014)

URNs for the Alert-Info Header Field of the Session Initiation Protocol (SIP). - Laura Liess; Roland Jesske; Alan B. Johnston; Dale R. Worley; Paul Kyzivat (RFC, 2015)

3GPP SIP URI Inter-Operator Traffic Leg Parameter. - Christer Holmberg; Jan Holm; Roland Jesske; Martin Dolly (RFC, 2015)

ISDN User Part (ISUP) Cause Location Parameter for the SIP Reason Header Field. - Roland Jesske (RFC, 2019)

An Opportunistic Approach for Secure Real-time Transport Protocol (OSRTP). - Alan B. Johnston; Bernard Aboba; Andrew Hutton; Roland Jesske; Thomas Stach (RFC, 2019)

Location Source Parameter for the SIP Geolocation Header Field. - James Winterbottom; Roland Jesske; Bruno Chatras; Andrew Hutton (RFC, 2020)