Standard Number: YD/T 2020-2009(YD/T2020-2009)
Chinese:公用交换电话网（PSTN）网络用户数据库设备技术要求
English:Public Switched Telephone Network (PSTN) Network Subscriber Database Equipment Technical Requirements
Effective Date:2010-01-01
Standard Applicability:
PDF Downloadable: N
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