level data link control high-bitrate digital subscriber line home location register (part of PLMN) hypertext mark-up language interface control information (defined by OSI) Internet control message protocol interface description language (specified by OMG) Abbreviations XXIII interface data unit (defined by OSI) internal initiating event (defined by AML) Internet inter-ORB protocol (specified by OMG) intelligent network IN application part INCOSE International Council on Systems Engineering Internet protocol internal resource relation (defined by AML) integrated services digital network Internet Society ISDN user part International Telecommunication Union ITU-T ITU, Telecommunication Sector local area network link access procedure (version B) link access procedure on the D-channel (part of ISDN) logical link control (part of GPRS) medium access (part of GPRS) mobile application part (part of GSM) M/E/I matter/energy/information message handler (defined by AML) message discrimination (defined by AML) managed information base (part of TMN) managed object (in TMN) mobile termination (part of PLMN) message type identifier (defined by AML) message transfer part (part of CCS) mobile system (part of PLMN) message sequence chart or mobile services switching centre multiplexer network interface (defined by AML) network management centre (part of TMN) node network function (defined by AML) network process controller (defined by AML) node platform (defined by AML) network termination network transport, control (defined by AML) network transport, data (defined by AML) network transport network (defined by AML) object handler (defined by AML) object identifier (defined by AML) operation and maintenance operation and maintenance centre (part of TMN) Object Management Group originating point code (defined by MTP, part of CCS) operation handler (defined by AML) Abbreviations operation identifier (defined by AML) object request broker (part of CORBA) object resource model (defined by AML) Open Systems Interconnection OSI RM OSI r