ITU-T M.3010
电信管理网原则M系列:电信管理网和网络维护:国际传输系统,电话电路,电报,传真和租用线路. 远程通信
Telecom Management Network Principles M Series: Telecommunications Management Network and Network Maintenance: International Transmission Systems, Telephone Circuits, Telegraph, Fax and Leased Lines. Telecommunications