X.20bis Use on public data networks of Data Terminal Equipment 1988 I 13 20 None (DTE) which is designed for interfacing to asynchronous duplex V-Series modems Interface between Data Terminal Equipment and Data 1992 I 13 20 None X.21 Circuit-terminating Equipment for synchronous operation on public data networks X.21bis Use on public data networks of Data Terminal Equipment 1988 I 13 20 None (DTE) which is designed for interfacing to synchronous modems X.22 Multiplex DTE/DCE interface for user classes 3-6 1988 I 13 20 None X.24 List of definitions for interchange circuits between Data 1988 I 13 20 None Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) on public data networks X.25 Interface between Data Terminal Equipment (DTE) and 1996 I 13 20 Daniel Duclos related to Data Circuit-terminating Equipment (DCE) for terminals Cor.1 (1998) I ISO/IEC 7776 operating in the packet mode and connected to public data and ISO/IEC networks by dedicated circuit 8208 X.26/ Electrical characteristics for unbalanced double-current 1993 I 16 14 None V.10 interchange circuits operating at data signalling rates nominally up to 100 kbit/s X.27/ Electrical characteristics for balanced double-current 1996 I 16 14 None V.11 interchange circuits operating at data signalling rates up to 10 Mbit/s X.28 DTE/DCE interface for a start-stop mode Data Terminal 1997 I 13 20 R. Selma None Equipment accessing the Packet Assembly/Disassembly facility (PAD) in a public data network situated in the same country X.28 Extensions of PAD parameters settings and PAD service Amd.1 (2000) I 13 20 Edmond J. None Amd.1 signals Blausten X.29 Procedures for the exchange of control information and 1997 I 13 20 R. Selma None user data between a Packet Assembly/Disassembly (PAD) facility and a packet mode DTE or another PAD X.30/ Support of X.21, X.21bis and X.20bis based Data 1993 I 13 20 None I.461 Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN)
X.20bis Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to asynchronous duplex V-Series modems 1988 I 13 20 None X.21 Interface between Data Terminal Equipment and Data Circuit-terminating Equipment for synchronous operation on public data networks 1992 I 13 20 None X.21bis Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous modems 1988 I 13 20 None X.22 Multiplex DTE/DCE interface for user classes 3-6 1988 I 13 20 None X.24 List of definitions for interchange circuits between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) on public data networks 1988 I 13 20 None X.25 Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit 1996 Cor.1 (1998) I I 13 20 Daniel Duclos related to ISO/IEC 7776 and ISO/IEC 8208 X.26/ V.10 Electrical characteristics for unbalanced double-current interchange circuits operating at data signalling rates nominally up to 100 kbit/s 1993 I 16 14 None X.27/ V.11 Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s 1996 I 16 14 None X.28 DTE/DCE interface for a start-stop mode Data Terminal Equipment accessing the Packet Assembly/Disassembly facility (PAD) in a public data network situated in the same country 1997 I 13 20 R. Selma None X.28 Amd.1 Extensions of PAD parameters settings and PAD service signals Amd.1 (2000) I 13 20 Edmond J. Blausten None X.29 Procedures for the exchange of control information and user data between a Packet Assembly/Disassembly (PAD) facility and a packet mode DTE or another PAD 1997 I 13 20 R. Selma None X.30/ I.461 Support of X.21, X.21bis and X.20bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN) 1993 I 13 20 None
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