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ITU-T M.1385 Maintenance of international leased circuits that are supported by international data transmission systems
ITU-T Q.821 Stage 2 and Stage 3 description for the Q3 interface - Alarm Surveillance
ITU-T O.1 Scope and application of measurement equipment specifications covered in the O-series Recommendations
ITU-T M.1532 Network maintenance service performance agreement (MSPA)
ITU-T M.3013 Considerations for a telecommunications management network
ITU-T G.711 Appendix II A comfort noise payload definition for ITU-T G.711 use in packet-based multimedia communication systems
ITU-T M.2102 Maintenance thresholds and procedures for recovery mechanisms (protection and restoration) of international SDH VC trails (paths) and multiplex sections
ITU-T Q.814 Specification of an electronic data interchange interactive agent
ITU-T Q.815 Specification of a security module for whole message protection
ITU-T Q.836.1 SSF management information model
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