Home / Standards / YD/T 1556-2007 YD/T 1556-2007 Abolished 2GHz cdma2000数字蜂窝移动通信网设备技术要求：基站子系统 Standard Type YD ICS N/A CCS N/A Status Abolished Issue Date 2007-05-15 Implementation 2007-05-15 Centralized Committee 信息产业部 Issuing Authority 信息产业部