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YD/T 1248.4-2005 Part Ⅳ:Test methods of short message centre based on PSTN 3090 (USD) via email in 1-10 business day VALID
YDN 115.1-1999 1515 (USD) via email in 1-10 business day VALID
YD/T 1388.1-2005 Technical requirements of the softswitch based services part1:Services system 225 (USD) via email in 1-3 business day VALID
YD/T 3217-2017 RESTful based Service Capabiluty Open API-Video Share via email in VALID please email coc@codeofchina.com for quotation
YD/T 1514-2006 Distance Learning Communications Platform Technical Requirement for the System of User Access Authentication Authorization and Accounting via email in VALID please email coc@codeofchina.com for quotation
YD/T 1388.4-2005 Technical requirements of the softswitch based services part 4:Multiparty call services 315 (USD) via email in 1-3 business day VALID
YD/T 1388.3-2005 Technical requirements of the softswitch based services part3:Call forwarding services 240 (USD) via email in 1-3 business day VALID
YD/T 1039.1-2000 420 (USD) via email in 1-3 business day ABOLISHED
YD/T 1921.1-2009 Technical Requirements for IPService Detail Record Part 1:General Requirements via email in VALID please email coc@codeofchina.com for quotation
YD/T 1926.1-2009 IT Operations and Maintenance Service Management Technical Specification Part 1:Architecture via email in VALID please email coc@codeofchina.com for quotation
YD/T 1124-2001 The Technical Requirements for Number Portability Service 390 (USD) via email in 1-3 business day VALID
GB 2357-1980 Telephone parameters-Measuring methods of equivalence 75 (USD) via email in 1-3 business day ABOLISHED
YD/T 3240-2017 Technical requirements of intelligent application deployment platform for mobile internet via email in VALID please email coc@codeofchina.com for quotation
YDN 119.1-1999 885 (USD) via email in 1-8 business day VALID
YD/T 1264-2003 General technical requirement of IP telephony and IP fax services:Phase two 2685 (USD) via email in 1-10 business day VALID
YD/T 3247-2017 Mobile payment technical requirements for multi-application management protocol via email in VALID please email coc@codeofchina.com for quotation
YD/T 2026-2009 The technical requirement and evaluation method for quality of IP telephony via email in VALID please email coc@codeofchina.com for quotation
YDN 115.2-1999 1620 (USD) via email in 1-10 business day VALID
YD/T 1620.4-2007 SDH-based MSTP Network Management Technical Specification Part 4:EMS-NMS Interface Common Information Model via email in VALID please email coc@codeofchina.com for quotation
YD/T 2015-2009 Architecture for IPTV Service Management System via email in VALID please email coc@codeofchina.com for quotation
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