ONORM ENV 41211-1-1993 信息系统互连．虚拟终端． 基本类型．A模式X．3．虚拟终端服务

标准号：ONORM ENV 41211-1-1993
中文标准名称：信息系统互连．虚拟终端． 基本类型．A模式X．3．虚拟终端服务
英文标准名称：Information Systems Interconnection -Virtual Terminal -Basic class - A-mode X.3 - Virtual terminal service
发布日期：1993/2/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This Functional Standard provides a method of interactive operation using OSI Virtual Terminal Service and Protocol which is equivalent to the CCITT X.3 PAD functionality and X.29 protocol commonly used over virtual circuits of X.25 packet switched networks. It includes a modelling of the X.3 PAD Parameters and associated X.29 operations using VT concepts.This Functional Standard supports applications where the terminal representation of the interactive data stream is character orientated and where the terminal end system is associated with a function equivalent to an X.3 PAD as defined in the CCITT Recommendations. This Functional Standard only supports a transparent repertoire since X.3 and X.29 do not support character repertoire declaration. This Functional Standard does not constrain the syntax or semantics of information transferred in this transparent repertoire syntax.This Functional Standard does not include a specification of those capabilities of the Virtual Terminal that must be realised in the real terminal device since again X.3 and X.29 do not provide any similar facilities. It is expected that users of this Functional Standard will wish to agree the capabilities of the real device by means outside the scope of this Functional Standard.Reference to ENV 41901 may be useful for the information and guidance it gives on the use of the X.3 PAD Parameter values.