ITU-T M.90-1989
Sub-Control Stations - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 3 pp

Standard No.

ITU-T M.90-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T M.90-1989

Scope

Thus, for technical purposes (maintenance, lining-up) fhe control function for digital paths, groups, supergroups, mastergroups, supermastergroups and regulated line sections are divided between the two directions of transmission, the station at the inco

ITU-T M.90-1989 history

• 1989 ITU-T M.90-1989 Sub-Control Stations - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits (Study Group IV) 3 pp