TR 101 111 : 3.0.1 UNIVERSAL MOBILE TELECOMMUNICATIONS SYSTEM (UMTS); REQUIREMENTS FOR THE UMTS TERRESTRIAL RADIO ACCESS SYSTEM (UTRA) (UMTS 21.01 VERSION 3.0.1) European Telecommunications Standards Institute
ETS 300 385 : 20001 European Telecommunications Standards Institute
ETSI GSM 01.04 : 050000 EUROPEAN DIGITAL CELLULAR TELECOMMUNICATION SYSTEM (PHASE 2); DEFINITIONS, ABBREVIATIONS AND ACRONYMS European Telecommunications Standards Institute
ETS 300 260 : 20002 PRIVATE TELECOMMUNICATION NETWORK (PTN) - SPECIFICATION, FUNCTIONAL MODELS AND INFORMATION FLOWS - CALL TRANSFER SUPPLEMENTARY SERVICE European Telecommunications Standards Institute
ETS 300 519 : 20002 EUROPEAN DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2) - ADVICE OF CHARGE (AOC) SUPPLEMENTARY SERVICE - STAGE 1 European Telecommunications Standards Institute
ETS 300 347-9 : 20001 SIGNALLING PROTOCOLS AND SWITCHING (SPS) - V INTERFACES AT THE DIGITAL LOCAL EXCHANGE (LE) - V5.2 INTERFACE FOR THE SUPPORT OF ACCESS NETWORK (AN) - TEST SPECIFICATION FOR THE PHYSICAL LAYER European Telecommunications Standards Institute
ETS 300 515 : 20002 EUROPEAN DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2) - CALL FORWARDING (CF) SUPPLEMENTARY SERVICE - STAGE 1 European Telecommunications Standards Institute
ETR 303 : 20001 METHODS FOR TESTING SPECIFICATION (MTS) - TEST SYNCHRONIZATION - ARCHITECTURAL REFERENCE European Telecommunications Standards Institute
ETS 300 132-1 : 20001 EQUIPMENT ENGINEERING (EE) - POWER SUPPLY INTERFACE AT THE INPUT TO TELECOMMUNICATIONS EQUIPMENT - OPERATED BY ALTERNATING CURRENT (AC) DERIVED FROM DIRECT CURRENT (DC) SOURCES European Telecommunications Standards Institute
ETS 300 689 : 20001 BUSINESS TELECOMMUNICATIONS (BTC) - 140 MBIT/S DIGITAL LEASED LINES (D140U AND D34S) - TERMINAL EQUIPMENT INTERFACE European Telecommunications Standards Institute
TBR 200014 : 20001 BUSINESS TELECOMMUNICATIONS (BTC) - 64 KBIT/S DIGITAL UNRESTRICTED LEASED LINE WITH OCTET INTEGRITY (D64U) - ATTACHMENT REQUIREMENTS FOR TERMINAL EQUIPMENT INTERFACE European Telecommunications Standards Institute
ETS 300 643 : 20001 INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - OVERALL NETWORK ASPECTS AND FUNCTIONS - FRAME RELAYING SERVICE SPECIFIC CONVERGENCE SUBLAYER (FR-SSCS) European Telecommunications Standards Institute