ITU-T - M.490
Exchange of Information for Planned Outages of Transmission Systems - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 4 pp
inactive, Most Current
| Organization: | ITU-T |
| Publication Date: | 1 January 1989 |
| Status: | inactive |
| Page Count: | 4 |
Document History
M.490
January 1, 1989
Exchange of Information for Planned Outages of Transmission Systems - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 4 pp
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