Q_921.pdf | |
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资料名称:Q_921.pdf 资料大小:984.88 KB 上传时间:2011-12-16 17:25:32 下载次数:1 次 所需威望:30 个 您尚未登录本论坛,请先登录 资料等级: 您尚未登录本论坛,请先登录 |
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【资料名称】:ISDN USER-NETWORK INTERFACE-DATA【资料作者】:ITU-T 【资料日期】:2000【资料语言】:英文【资料格式】:DOC【资料目录和简介】:CONTENTS
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Recommendation Q.921 (03/93) Page 1General ...........................................................................................................................................................1 2Frame structure for peer-to-peer communication ...........................................................................................1 2.1General..............................................................................................................................................1 2.2Flag sequence....................................................................................................................................1 2.3Address field .....................................................................................................................................1 2.4Control field......................................................................................................................................2 2.5Information field ...............................................................................................................................2 2.6Transparency.....................................................................................................................................3 2.7Frame check sequence (FCS) field ...................................................................................................3 2.8Format convention ............................................................................................................................3 2.9Invalid frames ...................................................................................................................................5 2.10Frame abort .......................................................................................................................................5 3Elements of procedures and formats of fields for data link layer peer-to-peer communication .....................5 3.1General..............................................................................................................................................5 3.2Address field format .........................................................................................................................5 3.3Address field variables......................................................................................................................5 3.4Control field formats.........................................................................................................................7 3.5Control field parameters and associated state variables....................................................................8 3.6Frame types.......................................................................................................................................10 4Elements for layer-to-layer communication ...................................................................................................13 4.1General..............................................................................................................................................13 4.2Primitive procedures .........................................................................................................................18 4.3Block interaction diagram of the data link layer ...............................................................................18 5Definition of the peer-to-peer procedures of the data link layer.....................................................................22 5.1Procedure for the use of the P/F bit...................................................................................................22 5.2Procedures for unacknowledged information transfer ......................................................................22 5.3Terminal endpoint identifier (TEI) management procedures............................................................23 5.4Initialization of data link layer parameters........................................................................................32 5.5Procedures for establishment and release of multiple frame operation.............................................33 5.6Procedures for information transfer in multiple frame operation......................................................36 5.7Re-establishment of multiple frame operation ..................................................................................40 5.8Exception condition reporting and recovery .....................................................................................41 5.9List of system parameters .................................................................................................................43 5.10Data link layer monitor function.......................................................................................................44 本站已经禁止了迅雷、快车等工具下载,请直接点击下载;如这类工具是你的默认下载工具,请取消再试。 如何取消? |