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ITU-T X.229 Remote Operations: Protocol specification
ITU-T X.302 Description of the general arrangements for internal network utilities within a subnetwork and intermediate utilities between subnetworks for the provision of data transmission services
ITU-T X.305 Functionalities of subnetworks relating to the support of the OSI connection-mode network service
ITU-T X.322 General arrangements for interworking between packet switched public data networks (PSPDNs) and circuit switched public data networks (CSPDNs) for the provision of data transmission services
ITU-T X.323 General arrangements for interworking between packet switched public data networks (PSPDNs)
ITU-T X.324 General arrangements for interworking between packet switched public data networks (PSPDNs) and public mobile systems for the provision of data transmission services
ITU-T X.326 General arrangements for interworking between Packet-Switched Public Data Networks (PSPDNs) and Common Channel Signalling Network (CCSN)
ITU-T X.351 Special requirements to be met for Packet Assembly/Disassembly facilities (PADs) located at or in association with coast earth stations in the public mobile satellite service
ITU-T X.353 Routing principles for interconnecting public maritime mobile satellite data transmission systems with public data networks
ITU-T Z.301 Introduction to the CCITT man-machine language
ITU-T Z.302 The meta-language for describing MML syntax and dialogue procedures
ITU-T Z.311 Introduction to syntax and dialogue procedures