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YD/T 1378-2005 The technical requirement of No.7 signalling between gateway office for Inter-Public telecom network 630 (USD) via email in 1-5 business day VALID
YD/T 1289.6-2009 Technical specification for SDH transport network management system part VI:EMS-NMS interface information model based on IDL/IIOP via email in VALID please email coc@codeofchina.com for quotation
YD/T 1252-2003 The technical requirements of intelligent network quipment——Integrated Service Control Point (ISCP) 315 (USD) via email in 1-3 business day VALID
YD/T 1543.2-2007 Technical Specification for 2GHz WCDMA Digital Cellular Mobile Communication Network Iu Interface (Phase Ⅰ)Part 2: Layer 1 via email in VALID please email coc@codeofchina.com for quotation
YD/T 1767.1-2008 Technical Requirements for Automatically Switched Optical Network Management Part 1:Basic Principle 165 (USD) via email in 1-3 business day VALID
YD/T 1586.1-2007 Technical Specification for 2GHz WCDMA Digital Cellular Mobile Communication Network Management(Phase Ⅰ)Part 1 Configuration Network Resource Model via email in VALID please email coc@codeofchina.com for quotation
YDC 043.3-2006 Technical Requirements of Wireless Application Protocol (WAP) Part 3 Wireless Application Environment via email in VALID please email coc@codeofchina.com for quotation
YD/T 1126-2001 No.7 signalling system test specification--Signalling connection control part(SCCP) 2970 (USD) via email in 1-10 business day VALID
YD/T 3276-2017 Network operation & management indicator for LTE radio access network via email in VALID please email coc@codeofchina.com for quotation
YD/T 1226-2002 Intelligent network Capabillity Set two (CS-2) Intelligent Network Application Protocol (INAP) 6105 (USD) via email in 1-10 business day VALID
GB/Z 20177.3-2006 Control network LONWORKS technology specificationPart 3: Free-topology twisted-pair channel specification via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
YD/T 1289.4-2006 Synchronous Digital Hierarchy (SDH)transport network management system technical specification Part 4:EMS-NMS Interface Function 465 (USD) via email in 1-5 business day VALID
YD/T 1544.4-2007 Technical Specification for Uu Interface of 2GHz WCDMA Digital Cellular Mobile Communication Network Physical Layer Part 4:Spreading and Modulation via email in VALID please email coc@codeofchina.com for quotation
YD/T 1543.4-2007 Technical Specification for 2GHz WCDMA Digital Cellular Mobile Communication Network Iu Interface (Phase Ⅰ)Part 4:RANAP via email in VALID please email coc@codeofchina.com for quotation
YD/T 1478-2006 Security Technical Requirements of Telecommunications Management Network(TMN) 285 (USD) via email in 1-3 business day VALID
YD/T 1767.3-2009 Technical Requirements for Automatically Switched Optical Network (ASON) Management Part 3: EMS-NMS Interface Function via email in VALID please email coc@codeofchina.com for quotation
YDC 043.4-2006 Technical Requirements of Wireless Application Protocol (WAP)Part 4 Wireless Markup Language via email in VALID please email coc@codeofchina.com for quotation
GB/T 7262-2009 Technical requirements and equipment arrangement for highway communication 240 (USD) via email in 1-3 business day VALID
GB 7437-1987 The transmission performance objectives for public analogue toll telephone automatic switching network 105 (USD) via email in 1-3 business day ABOLISHED
YD/T 1289.2-2003 Synchronous Digital Hierarchy (SDH)transport network management system technical specification part 2:Element Management System (EMS)function 570 (USD) via email in 1-5 business day VALID
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