ETSI ETS 300 356- 14-1995 综合业务数字网(ISDN).7号信令系统.用于国际接口的综合业务数字网用户部分(ISUP).第2版.第14部分:显式呼叫转移(ECT)补充业务
Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) Version 2 for the International Interface; Part 14: Explicit Call Transfer (ECT) Supplementary Service