Basic Level of Interoperability for SIP Services (bliss)
Call Control UUI Service for SIP (cuss)
Media Server Control (mediactrl)
SIP for Instant Messaging and Presence Leveraging Extensions (simple)
Speech Services Control (speechsc)
Session PEERing for Multimedia INTerconnect (speermint)
looSely-couPLed sIp deviCES (splices)
Centralized Conferencing (xcon)