【正版授权-英语版】 ISO/IEC 7776:1995 EN Information technology - Telecommunications and information exchange between systems - High-level data link control procedures - Description of the X.25

ISO/IEC7776:1995ENInformationTechnology—Telecommunicationsandinformationexchangebetweensystems—High-levelDataLinkControlProcedures(HDLC)isastandardthatspecifiesthedatalinkcontrolproceduresforuseintelecommunicationsandinformationexchangebetweensystems.Itprovidesastandardizedframeworkforthecommunicationbetweendigitalsystemstoensurereliableandefficientdatatransmission.TheX.25LAPB-compatibleDTEdatalinkproceduresareoneofthespecificproceduresdefinedinthisstandard.DTEstandsforDataTerminalEquipment,whichreferstothedigitalequipmentthattransmitsandreceivesdata.TheproceduresdefinedinthisstandardprovidedetailedinstructionsforhowtheDTEshouldinteractwiththedatalinktoensurereliableandefficientdatatransmissionoverX.25networks.

TheX.25networkisacommonlyusedtelecommunicationsnetworkthatprovidesconnectivitybetweendigitalsystemsoverasharednetworkinfrastructure.LAPB(LinkAccessProcedureBalanced)isaprotocolusedinX.25networkstoestablishandmaintainreliabledatalinksbetweensystems.DTEdatalinkproceduresconformingtoHDLCstandardsensurethatdataistransmittedandreceivedcorrectlyandefficientlyoverX.25networks.

TheDTEdatalinkproceduresdefinedinISO/IEC7776includevariousfunctionssuchasframesynchronization,frametransmissionandreception,flowcontrol,errordetectionandcorrection,andotherrelatedfunctions.TheseproceduresensurethattheDTEcaninteracteffectivelywiththedatalinktotransmitandreceivedataefficientlyandreliably.

ISO/IEC7776:1995EN标准规定了用于电信和系统间信息交换的高层次数据链控制程序。它为数字系统之间的通信提供了一个标准化框架，以确保可靠和有效的数据传输。X.25LAPB兼容的DTE数据链路程序是这个标准中定义的具体程序之一。该标准为DTE设备如何与数据链路交互提供了详细的指导，以确保在X.25