1. | Message handling and directory services operations and definition of service : recommendations F.400 - F.422, F.500 / International Telecommunication UnionData Publicação: 1989 Tema: Vária | ![]() | |
2. | Telegraph transmission : series R recommendationsData Publicação: 1989 Tema: Vária | ![]() | |
3. | Telegraph switching : series U recommendations / International Telecommunication UnionData Publicação: 1989 Tema: Vária | ![]() | |
4. | Telegraph and mobile services operations and quality of service : recommendations F.1 - F.140 / International Telecommunication UnionData Publicação: 1989 Tema: Vária | ![]() |