ITU-T X.612-1992
信息技术.通过连接到综合业务数字网(ISDN)的分组式终端设备的OSI连接式网络业务的提供
Information Technology - Provision of the OSI Connection-Mode Network Service by Packet-Mode Terminal Equipment Connected to an Integrated Services Digital Network (ISDN) 21 pp (ISO/CCIT Common Text)