ITU-T M.721-1989
System Availability Information Point - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 1 pp

Standard No.

ITU-T M.721-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T M.721-1989

Scope

System Availability Information Point - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 1 pp

ITU-T M.721-1989 history

• 1989 ITU-T M.721-1989 System Availability Information Point - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 1 pp