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ETS 300 494-2 : 20001 European Telecommunications Standards Institute
EN 301 007-1 : 1.1.3 INTEGRATED SERVICES DIGITAL NETWORK (ISDN); SIGNALLING SYSTEM NO. 7; OPERATIONS, MAINTENANCE AND ADMINISTRATION PART (OMAP) - PART 1: PROTOCOL SPECIFICATION European Telecommunications Standards Institute
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ETS 300 392-11-13 : 20001 TERRESTRIAL TRUNKED RADIO (TETRA); VOICE PLUS DATA (V+D); PART 11: SUPPLEMENTARY SERVICES STAGE 2; SUB-PART 13: CALL COMPLETION TO BUSY SUBSCRIBER (CCBS) European Telecommunications Standards Institute
TS 100 602 : 7.0.0 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - INTERWORKING BETWEEN THE PUBLIC LAND MOBILE NETWORK (PLMN) AND THE PACKET SWITCHED PUBLIC DATA NETWORK (PSPDN) FOR PACKET ASSEMBLY/DISASSEMBLY (PAD) FACILITY ACCESS European Telecommunications Standards Institute
TS 100 592 : 8.0.1 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+); BASE STATION CONTROLLER - BASE TRANSCEIVER STATION (BSC-BTS) INTERFACE GENERAL ASPECTS European Telecommunications Standards Institute
TS 100 541 : 7.0.0 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - ROUTEING OF CALLS TO/FROM PUBLIC DATA NETWORKS (PDN) AND THE GSM PUBLIC LAND MOBILE NETWORK (PLMN) European Telecommunications Standards Institute
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TS 101 642 : 8.0.1 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+); BASE STATION SYSTEM - MOBILE SERVICES SWITCHING CENTRE (BSS-MSC) INTERFACE - INTERFACE PRINCIPLES European Telecommunications Standards Institute
TS 100 625 : 7.0.0 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - UNSTRUCTURED SUPPLEMENTARY SERVICES DATA (USSD) - STAGE 1 European Telecommunications Standards Institute
TS 100 516 : 7.0.0 DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - CALL WAITING (CW) AND CALL HOLDING (HOLD) - SUPPLEMENTARY SERVICES - STAGE 1 European Telecommunications Standards Institute