KS X ISO/IEC 21410-2003 信息技术.系统间电信和信息交换.企业电信网.QSIG和H.323间的信令互通.呼叫转移补充业务
Information technology-Telecommunications and information exchange between systems-Corporate telecommunication networks-Signalling interworking between QSIG and H.323-Call transfer supplementary services