ONORM ENV 41114-1993 信息技术.简表T/A52的功能标准.局域网络.托肯总线(COTS + CLNS)

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标准号:ONORM ENV 41114-1993
中文标准名称:信息技术.简表T/A52的功能标准.局域网络.托肯总线(COTS + CLNS)
英文标准名称:Information technology - Functional standard for profile T/A52 - Local Area Network - Token Bus (COTS + CLNS)
发布日期:1993/3/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This Functional Standard specifies the Transport, Network, Link and Physical layer requirements for a ?Reference End System*, connected to a Broadband Multilevel Duobinary AM/PSK 10 Mb/s Token Bus LAN, which provides the OSI Connection-mode Transport Service (as defined in ISO 8072) using the OSI Connectionless-mode Network Service (as defined in ISO 8348/Xdd.l) which supports global network layer addressing (as defined in ISO 8348/Add.2) where the Reference End System is capable of interworking with other End Systems accessible through the OSI Connectionless-mode Network Service in accordance with ISO 8880-1 and ISO 8880-3.A system that supports only the requirements specified in this Functional Standard does not satisfy the conformance requirements for the Transport layer defined in ISO 8073. This Functional Standard alone does not meet the conditions for a fully open system set out in the addendum to the Reference Model covering Connectionless-mode transmission, ISO 7498/DAD1.Note 3: This Functional Standard may be implemented in conjunction with other Functional Standards in an End System so that full conformance to the Transport requirements are met and the conditions for a fully open system are satisfied.This Functional Standard specifies a set of protocols, termed a profile, to provide the function defined above. It does not specify total system capability. In particular, a system may operate this profile and at the same time engage in other communications over the medium to which it is connected. The requirements placed on a system in this Functional Standard are solely those necessary for operation of the protocol set specified.Figure 2 illustrates the profile defined by this Functional Standard.Not* 4: A Profile conforming to this Functional Standard is not precluded from operating the Inactive Subset of ISO 8473 when communicating with another Profile on the same LAN.

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