ETS 300 533 : 20001 EUROPEAN DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2) - TECHNICAL REALIZATION OF OPERATOR DETERMINED BARRING European Telecommunications Standards Institute
ETS 300 251 : 20001 NETWORK ASPECTS (NA) - ACCESSIBILITY FOR 64 KBIT/S CIRCUIT SWITCHED INTERNATIONAL END-TO-END ISDN TRAFFIC RELATIONS European Telecommunications Standards Institute
ETR 030 : 20001 NETWORK ASPECTS (NA) - INTERWORKING ASPECTS OF MoU-ISDN PRIORITY 1 + 2 SERVICES European Telecommunications Standards Institute
ETS 300 687 : 20001 BUSINESS TELECOMMUNICATIONS (BTC) - 34 MBIT/S DIGITAL LEASED LINES (D34U AND D34S) - CONNECTION CHARACTERISTICS European Telecommunications Standards Institute
ETS 300 186 : 20001 INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - THREE PARTY (3 PTY) SUPPLEMENTARY SERVICE - SERVICE DESCRIPTION European Telecommunications Standards Institute
ETS 300 402-6 : 20001 INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. ONE (DSS1) PROTOCOL - DATA LINK LAYER - TEST SUITE STRUCTURE AND TEST PURPOSES (TSS&TP) SPECIFICATION FOR THE GENERAL PROTOCOL European Telecommunications Standards Institute
ETS 300 136 : 20001 INTEGRATED SERVICES DIGITAL NETWORK (ISDN); CLOSER USER GROUP (CUG) SUPPLEMENTARY SERVICE - SERVICE DESCRIPTION European Telecommunications Standards Institute
EN 301 048 : 1.1.1 PRIVATE INTEGRATED SERVICES NETWORK (PISN); INTER-EXCHANGE SIGNALLING PROTOCOL; TRANSIT COUNTER ADDITIONAL NETWORK FEATURE [ISO/IEC 15056 (1997) MODIFIED] European Telecommunications Standards Institute
ETR 261-7 : 20001 European Telecommunications Standards Institute
ETS 300 180 : 20001 INTEGRATED SERVICES DIGITAL NETWORK (ISDN); ADVICE OF CHARGE: CHARGING INFORMATION AT THE END OF THE CALL (AOC-E) SUPPLEMENTARY SERVICE - SERVICE DESCRIPTION European Telecommunications Standards Institute
ETS 300 352 : 20001 TELEVISION SYSTEMS - SPECIFICATION OF THE D2 HDMAC/PACKET SYSTEM European Telecommunications Standards Institute
ETS 300 374-2 : 20001 European Telecommunications Standards Institute