Normas ISO

Information technology -- Protocol for providing the connectionless-mode network service: Provision of the underlying service by an X.25 subnetwork

Information technology -- Protocol for providing the connectionless-mode network service: Provision of the underlying service by a subnetwork that provides the OSI data link service

Information technology -- Protocol for providing the connectionless-mode network service: Provision of the underlying service by ISDN circuit-switched B-channels

Information technology -- Telecommunications and information exchange between systems -- DTE/DCE interface back-up control operation using ITU-T Recommendation V.24 interchange circuits

Information technology -- Telecommunications and information exchange between systems -- DTE to DTE direct connections

Information technology -- Telecommunications and information exchange between systems -- Twisted pair multipoint interconnections