China 'YD/T 1522.7-2013 ' 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 1522.7-2013

Issued Date:2013-04-25

Implemented Date:2013-06-01

Issued by:

The Standardization Administration of the People's Republic of China

GB Standard Code	YD/T 1522.7-2013
Standard Category	China Telecommunication Standards
GB Standard English Title	Technical requirements for session initiation protocol. Part 7: SIP supporting presence and instant message service
GB Standard Chinese Title	会话初始协议（sip）技术要求第7部分：sip支持呈现和即时消息业务
Chinese Version Price	$5.00 per 1 page
English Translation Fee	$15.00~$30.00 per 1 page
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