This amendment to the ISUP Specification ITU-T Rec. Q.1902.4 (07/2001) contains seven modifications: 1) Correction of a cut and paste error in 7.4.1 and 7.4.4; 2) Modifications of the codec negotiation in 8.3; 3) Fallback procedures modification of 8.6.2.2.2; 4) Signalling procedures for automatic rerouting (crankback); new procedures in a new clause 8.21; 5) Procedures to support the calling party's category for calls from mobile terminals; new procedures in a new clause 8.22; 6) Handling of national use elements at an international gateway SN or CMN; new procedures in a new clause 13.8; 7) Two message flows examples in codec negotiation and modification in Appendix I.
ITU-T Q.1902.4 AMD 2 SPANISH-2004由国际电信联盟 IX-ITU 发布于 2004-04-01。
ITU-T Q.1902.4 AMD 2 SPANISH-2004 在中国标准分类中归属于: M10 通信网综合。
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