ETR 144 : universal personal telecommunication (UPT): UPT phase 1: numbering, dialling and evolution for in-call / European Telecommunications Standards Institute
ETR 149 : network aspects (NA): interworking between metropolitan area networks (MANs) and asynchronous transfer mode (ATM) networks for the connectionless broadband data service (CBDS) / European Telecommunications Standards Institute
ETS 300 086 : radio equipment and systems land mobile service: technical characteristics and test conditions for radio equipment with an internal or external RF connector intended primarily for analogue speech / European Telecommunications Standards Institute
ETS 300 133-3 : paging systems (PS): european radio message system (ERMES): part 3: network aspects: (annexes): ETS 300 133 -3 / European Telecommunications Standards Institute