China 'YDN 030.2-1997
' standard english version summary:
YD
中华人民共和国行业标准
INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
YDN 030.2-1997
Code number and dialing procedure of universal personal telecommunication, wide area Centrex switch (WAC), vote of telephone (VOT) and mass calling (MAS) services (internal standard) 通用个人通信（upt)、广域集中用户交换机(wac)、电话投票(vot)和大众呼叫(mas)的编号和拨号程序
Issued Date:
Implemented Date:
Issued by:
The Standardization Administration of the People's Republic of China
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"YDN 030.2-1997" standard !
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Code number and dialing procedure of universal personal telecommunication, wide area Centrex switch (WAC), vote of telephone (VOT) and mass calling (MAS) services (internal standard)
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