ONORM ENV 41802-5-1993 信息系统互连．X．25协议中继．RC51．1111文件(PSTN租用线路范围内的M－IT－02R/32)

标准号：ONORM ENV 41802-5-1993
中文标准名称：信息系统互连．X．25协议中继．RC51．1111文件(PSTN租用线路范围内的M－IT－02R/32)
英文标准名称：Information Systems Interconnection - X.25 Protocol Relaying - Profile RC51.1111 (M-IT-02 R/32 over PSTN leased line)
发布日期：1993/2/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 GeneralThls Functlonal Standard ls applicable to lnterworking units concemed with the use of ISO 8208 (X.25 Packet Level Protocol). An R/Cp.q relay provides the means for a System on one subnetwork to communlcate with a System, or make use of facüities. on another subnetwork.Thls part of thls Functlonal Profile defines the R/C51.1111 profile. which ls applicable to lnterworklng unlts operatlng between CSMA/CD LAN subnetworks and PSDNs using Virtual calls over a PSTN leased llne permanent access.1.2 Position in the taxonomyThe taxonomy of profiles ls deflned in ISO TR 10000-2. Thls part of thls Functlonal Standard defines the profile:R/C51.1111 X.25 Protocol Relaylng: Relaylng between a CSMA/CD LAN subnetwork and a PSDN subnetwork using Virtual calls over a PSTN leased llne permanent access.1.3 ScenartoFlgure 1 Ulustrates the configuratlon of Systems to which the R/C51.1111 profile ls applicable. The flgure shows two reference polnts. but Implementatlons of R/C51.1111 profiles may lnclude any number of subnetwork attachments, with a reference polnts correspondlng to each.