China 'YD/T 521-1992
' Industry standard english version:
YD
中华人民共和国行业标准
INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
YD/T 521-1992
Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces 数字交换机模拟接口测试方法及模拟接口(二线或四线)间传输特性的测试方法
Issued Date:1992-01-25
Implemented Date:1992-10-01
Issued by:
The Standardization Administration of the People's Republic of China
GB Standard Code
YD/T 521-1992
Standard Category
China Telecommunication
Standards
GB Standard English Title
Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces
GB Standard Chinese Title
数字交换机模拟接口测试方法及模拟接口(二线或四线)间传输特性的测试方法
Chinese
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English
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