Home / Standards / GB/T 11590-1999 GB/T 11590-1999 Abolished International data transmission services and optional user facilities in public data networks and ISDNs 公用数据网与ISDN网的国际数据传输业务和任选用户设施 Standard Type GBT ICS 33.040.40 CCS M19 Status 废止 Issue Date 1999-08-02 Implementation 2000-03-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A