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ITU-T E.850 Connection retainability objective for the international telephone service
ITU-T M.75 Technical service
ITU-T M.1130 General definitions and general principles of operation/maintenance procedures to be used in satellite mobile systems
ITU-T E.172 ISDN routing plan
ITU-T E.713 Control plane traffic modelling
ITU-T E.508 Forecasting new telecommunication services
ITU-T E.731 Methods for dimensioning resources operating in circuit switched mode
ITU-T M.10 Scope and application of Recommendations for maintenance of telecommunication networks and services
ITU-T M.21 Maintenance philosophy for telecommunication services
ITU-T M.20 Maintenance philosophy for telecommunication networks
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