ETR 037 : network aspects: telecommunications management network (TMN): objectives, principles, concepts and reference configurations / European Telecommunications Standards Institute
ETR 038 : business telecommunications (BT): open network provision (ONP) technical requirements: standardisation requirements for ONP leased lines / European Telecommunications Standards Institute
ETR 042 : radio equipment and systems (RES): digital european cordless telecommunications (DECT): a guide to DECT features that influence the traffic capacity and the maintenance of high radio link transmission / European Telecommunications Standards Institute
ETR 043 : radio equipment and systems (RES): digital european cordless telecommunications (DECT) common interface services and facilities requirements specification / European Telecommunications Standards Institute