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ITU-T M.3603 Application of maintenance principles to ISDN basic rate access
ITU-T M.3620 Principles for the use of ISDN test calls, systems and responders
ITU-T I.312/Q.1201 (10/92) Principles of intelligent network architecture
ITU-T G.796 Characteristics of a 64 kbit/s cross-connect equipment with 2048 kbit/s access ports
ITU-T X.612 Information technology - Provision of the OSI connection-mode network service by packet-mode terminal equipment connected to an Integrated Services Digital Network (ISDN)
ITU-T X.613 Information technology - Use of X.25 Packet Layer Protocol in conjunction with X.21/X.21 bis to provide the OSI connection-mode Network service
ITU-T X.614 Information technology - Use of X.25 Packet Layer Protocol to provide the OSI connection-mode Network service over the telephone network
ITU-T X.712 Information technology - Open Systems Interconnection - Common management information protocol: Protocol Implementation Conformance Statement (PICS) proforma