標準號：ONORM ENV 41802-1-1993
中文標準名稱：信息系統互連．X．25協議中繼．綜述和子網絡的獨立要求
英文標準名稱：Information Systems Interconnection - X.25 Protocol Relaying - General overview and subnetwork independent requirements
發布日期：1993/2/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This Functional Standard is applicable to lnterworking units concerned with the use of ISO8208 (X.25 Packet Level Protocol). An RCp.q relay provides the means for a system on onesubnetwork to communicate with a system, or make use of facilities, on anothersubnetwork.The current 'Directory of Profiles and ISPs' contained in ISO TR 10000-2 identifies a limitednumber of subnetworks to which X.25 protocol relaying is applicable. The subnetworksidentified by ISO TR 10000-2 are:.? 1 lnl Permanent access to a PSDN:? 2 In Leased (Permanent! Service digital data circuit:? 4111 ISDN circuit-switched bearer service via B-channel with semi-permanentaccess:? 42 In ISDN packet-switched bearer service via D-channel: and? 5n Local Area Networks.