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ITU-T E.153 Home country direct
ITU-T E.801 Framework for Service Quality Agreement
ITU-T V.25bis Synchronous and asynchronous automatic dialling procedures on switched networks
ITU-T E.776 Network grade of service parameters for UPT
ITU-T X.123 Mapping between escape codes and TOA/NPI for E.164/X.121 numbering plan interworking during the transition period
ITU-T E.165.1 Use of escape code '0' within the E.164 numbering plan during the transition period to implementation of NPI mechanism
ITU-T X.115 AMD 1 Definition of address translation capability in public data networks, Amendment 1: Refinements
ITU-T X.116 Address translation registration and resolution protocol
ITU-T X.49 Procedures for the provision of an extended multicast service for data terminal equipments (DTEs) using Recommendation X.25
ITU-T X.361 Connection of VSAT systems with Packet-Switched Public Data Networks based on X.25 procedures
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