KS X ISO/IEC 13872-2003 信息技术.系统间的远程通信和信息交换.专业综合业务网.规范、功能模式和信息流.呼叫转移补充服务
Information technology-Telecommunications and information exchangebetween systems-Private Integrated Services Network-Specification, functional model and information flows-Call Diversion supplementary services