标准号:ETS 300 356-2-2002
英文标准名称:Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) Version 4 for the International Interface; Part 2: ISDN Supplementary Service V4.2.1; ITU-T Recommendation Q.730 (1999) Modified
标准状态:W
标准类型:国际标准