ETR 006 : network aspects: numbering and addressing for the memorandum of understanding (MOU) on integrated services digital network (ISDN) (priorities 1 and 2) / European Telecommunications Standards Institute
ETR 010 : ISDN standards management (ISM): the ETSI basic guide on the european integrated services digital network / European Telecommunications Standards Institute
ETR 015 : radio equipment and systems digital european cordless telecommunications (DECT): reference document / European Telecommunications Standards Institute
ETR 016 : business telecommunications (BT): serveability performance objectives for private telecommunications networks (PTN) / European Telecommunications Standards Institute