SIS SS-ISO 9574-1990 信息技术．电信和系统间的信息交换．经由连接ISDN 分封模式DTE执行的OSI连接模式网络服务条款

标准号：SIS SS-ISO 9574-1990
中文标准名称：信息技术．电信和系统间的信息交换．经由连接ISDN 分封模式DTE执行的OSI连接模式网络服务条款
英文标准名称：Information technology — Telecommunications and information exchange between systems — Provision of the OSI connection-mode network service by packet mode DTE connected to an ISDN
发布日期：1990/3/14 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This International Standard specifies the method of providing the OSI Connection-mode Network Service (CONS) by packet mode terminal equipment connected to an Integrated Services Digital Network (ISDN) in accordance with the procedures described in CCITT Recommendation X.31. This is done by specifying the mapping of the CONS primitives and parameters to and from the elements of the protocols used by two types of packet mode terminal equipment:a) an X.25 DTE (TE2) connected to an R reference point and accessing an ISDN; andb) a packet mode ISDN terminal (TE1) operating ISO 8208 packet layer protocol (PLP) and connected to an ISDN at either the S or T reference point.NOTE - The definitions of TE1, TE2 and TA equipment, and R, S, and T reference points are given in CCITT Recommendation 1.411. This International Standard applies to a TE 1 orTE2/TA(i.e., an OSI End System) regardless of whether it is a physically separate system or embedded in other equipment such as a PBX.This International Standard addresses the provision of the CONS using Virtual Calls as described in CCITT Recommendation X.25, it does not address the use of X.25 Permanent Virtual Circuits.NOTE - This International Standard uses numbers to identify layers, rather than their names. This is done to align the terminology of this document with the terminology of the related CCITT Recommendations for ISDN, and does not imply any change in the functionality of the layers from that defined in the Basic Reference Model forOpen Systems Interconnection.