ITU-T M.1020-1989 标准详情
- 标准号：ITU-T M.1020-1989
- 中文标题：
- 英文标题：Characteristics of Special Quality International Leased Circuits with Special Bandwidth Conditioning - Maintenance of International Telegraph, Phototelegraph and Leased Circuits - Maintenance of the International Public Telephone Network - Maintenanc
- 标准类别：国际电信联盟标准
- 发布日期：1989-01-01
