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ITU-T X.723 Information technology - Open Systems Interconnection - Structure of management information: Generic management information
ITU-T X.745 Information technology - Open Systems Interconnection - Systems Management: Test management function
ITU-T I.365.1 B-ISDN ATM adaptation layer sublayers : Frame relaying service specific convergence sublayer (FR-SSCS)
ITU-T X.35 Interface between a PSPDN and a private PSDN which is based on X.25 procedures and enhancements to define a gateway function that is provided in the PSPDN
ITU-T X.327 General arrangements for interworking between Packet-Switched Public Data Networks (PSPDNs) and private data networks for the provision of data transmission services
ITU-T X.210 Information technology - Open Systems Interconnection - Basic Reference Model: Conventions for the definition of OSI services
ITU-T X.739 Information technology - Open Systems Interconnection - Systems Management: Metric objects and attributes
ITU-T X.223 Use of X.25 to provide the OSI connection-mode network service for ITU-T applications
ITU-T X.738 Information technology - Open Systems Interconnection - Systems management: Summarization function