ITU X.211:1995

ITU X.211:1995 Information Technology - Open Systems Interconnection - Physical Service Definition Defines the OSI Physical Service in terms of primitive actions and events, parameters associated with each action and event, and the interrelationship between them. It specifies the characteristics of

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Table of Contents

1Scope
2Normativereferences
2.1IdenticalRecommendations/InternationalStandards
3Definitions
3.1BasicReferenceModeldefinitions
3.2Serviceconventiondefinitions
4Abbreviations
5Conventions
5.1Generalconventions
5.2Parameters
5.3PhCendpointidentificationconvention
6Overviewandgeneralcharacteristics
7FeaturesofthePhysicalService
7.1ThePhysicalServiceoffersthefollowingfeatures
toaPhSuser
7.2OtheraspectsofthePhysicalServiceinclude
8ClassesofPhysicalService
9ModelofthePhysicalService
9.1Modelofthelayerservice
9.2Modelofapoint-to-pointPhC
9.3Modelofarelayedpoint-to-pointPhCwheretherelay
iscontrolledwithinthePhSProvider
9.4Modelofarelayedpoint-to-pointPhCwheretherelay
iscontrolledfromtheNetworkLayer
10QualityofPhysicalService
10.1DefinitionofthePhCQOS
10.2DeterminationofQOSvalues
11Sequenceofprimitives
11.1RelationofprimitivesatthetwoPhCendpoints
11.2SequenceofprimitivesatonePhCendpoint
12PhCactivationphase
12.1Function
12.2Typesofprimitivesandparameters
12.3Sequenceofprimitives
13PhCdeactivationphase
13.1Function
13.2Typesofprimitivesandparameters
13.3Sequenceofprimitives
14Datatransferphase
14.1Function
14.2Typesofprimitivesandparameters
14.3Sequenceofprimitives
AnnexA-InternalstructureofthePhysicalLayer
A.1Introduction
A.2Classificationregardingmultiplexing
A.3Isochronoustransmission
AnnexB-Operationofdatalinkprotocolusingthe
half-duplexphysicalservice
B.1Introduction
B.2Operation
AnnexC-Compositestatetransitiondiagram
C.1Introduction

Abstract

Defines the OSI Physical Service in terms of primitive actions and events, parameters associated with each action and event, and the interrelationship between them. It specifies the characteristics of a conceptual Physical Service and thus supplements the OSI Basic Reference Model in guiding the development of Physical Layer protocols, but does not specify the individual implementations or products within an information processing system.

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