ITU-T M.21 FRENCH-1992 PDF

Scope: This Recommendation describes the maintenance philosophy for telecommunication services. It also defines service maintenance phases, service supervision capabilities, and bringing into service requirements.

ITU-T M.21 FRENCH-1992 Referenced Document

ITU-T E.420 CHECKING THE QUALITY OF THE INTERNATIONAL TELEPHONE SERVICE – GENERAL CONSIDERATIONS*， 1993-01-01 Update
ITU-T E.800 Definitions of terms related to quality of service (Study Group 2)*， 2008-09-01 Update
ITU-T E.862 Telephone network and ISDN; quality of service, network management and traffic engineering; dependability planning of telecommunication networks*， 1992-06-01 Update
ITU-T M.1510 Exchange of Contact Point Information for the Maintenance of International Services and the International Network - Maintenance: Information Exchange (Study Group IV) 13 pp
ITU-T M.1520 Standardized Information Exchange between Administrations - Maintenance: Designations and Information Exchange (Study Group IV) 12 pp
ITU-T M.1550 Escalation Procedure - Maintenance: Designations and Information Exchange (Study Group IV) 6 pp
ITU-T M.1560 Escalation Procedure for International Leased Circuits - Maintenance: Designations and Information Exchange (Study Group IV) 14 pp
ITU-T M.20 Maintenance Philosophy for Telecommunication Networks - Maintenance: Introduction and General Principles (Study Group IV) 24 pp
ITU-T M.75 TECHNICAL SERVICE

1992 ITU-T M.21 FRENCH-1992 Maintenance Philosophy for Telecommunication Services - Maintenance: Introduction and General Principles of Maintenance and Maintenance Organization (Study Group IV) 8 pp