China 'YD/T 1522.31-2009 ' Industry standard english version:

中华人民共和国行业标准
INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

YD/T 1522.31-2009

Issued Date:2009-06-15

Implemented Date:2009-09-01

Issued by:

The Standardization Administration of the People's Republic of China

GB Standard Code	YD/T 1522.31-2009
Standard Category	China Telecommunication Standards
GB Standard English Title	Technical Requirements For Session Initiation Protocol. Part 3: Interworking between ISUP and SIP-Supplement 1
GB Standard Chinese Title	会话初始协议（sip）技术要求第3部分：isdn用户部分（isup）和会话初始协议（sip）的互通（补充件1）
Chinese Version Price	$5.00 per 1 page
English Translation Fee	$15.00~$30.00 per 1 page
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