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２０００年第二季度 ,信息产业部批准发布通信行业标准１８项 ,具体如下。１．ＹＤ／Ｔ１０５７ -２０００９００／１８００ＭＨｚＴＤＭＡ数字蜂窝移动通信网基站子系统设备测试规范２．ＹＤ／Ｔ１０５８ -２０００通信用高频开关组合电源３．ＹＤ／Ｔ１０５９ -２０００移动
In the second quarter of 2000, the Ministry of Information Industry approved the release of 18 communications industry standards, as follows. 1. YD / T1057 -2000900 / 1800MHzTDMA digital cellular mobile communication network base station subsystem equipment test specification 2. YD / T1058 -2000 communication with high-frequency switch combination power supply 3. YD / T1059 -2000 mobile