CAN/CSA-ISO/IEC 15992:2004
信息技术 系统间的电信和信息交换 专用综合业务网 交换机间信令协议 呼叫优先中断和呼叫优先中断保护补充业务
Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Priority Interruption and Call Priority Interruption Protection supplementary services