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M.21 : Maintenance philosophy for telecommunication services

Recommendation M.21

In force components
Number
Title Status
M.21 (10/92)
 
Maintenance philosophy for telecommunication services   In force
 
 
Superseded and Withdrawn components
Number
Title Status
M.21 (11/88)
 
Principles for maintenance philosophy and considerations for maintenance strategy for telecommunication services   Superseded

 

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Updated : 2008/12/19