1.		Approval requirements for data terminal equipment to connect to packet switched public data networks using CCITT recommendation X.25 (1984) interface : NET 2 / European Conference of Postal and Telecommunications Administrations Data Publicação: 1988 Tema: Vária
2.		Approval requirements for terminal equipment to connect to packet integrated services digital network (ISDN) using ISDN basic access : NET 3 / European Conference of Postal and Telecommunications Administrations Data Publicação: 1988 Tema: Vária