Abbreviations and acronyms 3GPP 3GPP2 3PCC AAA AIN AIP ARIB AS ATIS Third Generation Partnership Project Third Generation Partnership Project 2 Third Party Call Control Authentication, Authorization and Accounting Advanced Intelligent Network Application Infrastructure Provider Cx Reference Point Diameter based interface to HSS DB2 DMZ EAR EJB ESB ETSI ETSI IBM universal Data Base 2 DeMilitarized Zone Enterprise ARchive Enterprise JavaBean Enterprise Service Bus European Telecommunication Standards Institute European Telecommunications Standards Institute Association of Radio Industries and Businesses Application Server ETSI Alliance for Telecommunications Industry Solutions European Telecommunications Standards Institute Fixed Mobile Convergence FMC