YD/T 1328-2009.The technical requirement and test method for the charging performance of currently u...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 1328-2004 在用局用交换设备计费技术要求和检测方法移动电话网部分
YD/T 1328-2004.The technical requirement and test method for the charging performance of currently u...
YD通讯标准
YD/T 1328-2015 数字蜂窝移动通信网语音业务计费系统计费性能技术要求和检测方法
YD/T 1328-2015.Technical requirements and testing methods for billing performance of billing system ...