ZyXEL Communications 2864 Series, User Manual, Page: 254 / 267

E–2
Selection of ITU-T standards
X.1-X.15 Services and features.
X.1 International classes for users in public data networks.
X.15 Definitions regarding public data networks.
X.20-X.32 Interfaces.
X.25 DTE/DCE interface for terminal equipment used in public
networks working in packet mode.
X.31 Support for packet-oriented terminal equipment in ISDN.
X.32 DTE/DCE interface for packet-oriented terminal equipment which
accesses a public PAD through public phone lines.
X.40-X.87 Transmission, identification and mediating.
X.50 Basic multiplex scheme for an international interface between
synchronous data networks.
X.87 Basic standards and methods for the realization of international
features for users and of network features in public data networks.
X.200-X.244 Open communication systems.
X.200 Reference model for open communication systems for ITU-T
applications.
X.250 Description methods for systems.
X.300-X.310 Interaction between networks.
X.350-X.353 Mobile telecommunication systems.
027 23 0x17 ETB CTRL-W End of transmission block
030 24 0x18 CAN CTRL-X Cancel
031 25 0x19 EM CTRL-Y End of (tape) media
032 26 0x1A SUB CTRL-Z Substitute
033 27 0x1B ESC ESC Escape
034 28 0x1C FS Form separator
035 29 0x1D GS Group separator
036 30 0x1E RS Record separator
037 31 0x1F US Unit separator
Oct Dec. Hex Character Key Description