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YD/T 1522.1-2006 Technical Requirements for Session Initiation Protocol Part 1:Basic Session Initiation Protocol (USD) via email in 1-10 business day VALID
YD/T 1350.4-2007 Technical Specification for Interface of WDM Network Management System Part 4:Interface based on CORBA/IDL via email in please email coc@codeofchina.com for quotation
YD/T 1521-2006 Testing Specification Routing Rrotocol Interoperability via email in VALID please email coc@codeofchina.com for quotation
YD/T 1445-2006 Technical Requirements of Adaption Layer of No.7 Signalling Interworking with IP Message Transfer Part (MTP)Level 2 User Adaption Layer (USD) via email in 1-8 business day VALID
YD/T 1440-2006 Router security test methods-middle/low end router(IPv4) (USD) via email in 1-5 business day VALID
YD/T 1443-2006 Technical Requirements of Generic Framing Procedure(GFP) (USD) via email in 1-5 business day ABOLISHED
YD/T 1878.3-2009 800MHz/2GHz cdma2000 Digital Cell Mobile Communications Network (HRPD) Network Management Technical Specification Part 3:Network Resource Model Design based CORBA via email in VALID please email coc@codeofchina.com for quotation
YDN 018-1996 (USD) via email in 1-8 business day
GB/T 3974-1983 Telephone transmission interference allowances for long-distance high-capacity analogue microwave communication systems (USD) via email in 1-3 business day
YD/T 1378-2005 The technical requirement of No.7 signalling between gateway office for Inter-Public telecom network (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
GF 007-1994 (USD) via email in 1-10 business day
YD/T 1431-2006 Technical requirement and testing methods for the charging performance of exchange-mobile intelligent network part (USD) via email in 1-3 business day
YD/T 1878.2-2009 800MHz/2GHz cdma2000 Digital Cell Mobile Communications Network (HRPD)Network Management Technical Specification Part 2:Performance Network Resource Model via email in VALID please email coc@codeofchina.com for quotation
YD/T 1795-2008 Network Management Technical Requirements for 2GHz TD-SCDMA/WCDMA Digital Cellular Mobile Communications Network Element Direct connection Interface Function (USD) via email in 1-3 business day VALID
GB/T 3971.3-1983 The test methods for the technical specifications of multi-frequency register signaling for telephone automatic switching network (USD) via email in 1-3 business day VALID
YD/T 2336.4-2017 Technical requirement for packet transport network management Part 4:EMS-NMS interface common information model 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 (USD) via email in 1-3 business day VALID
T/CCSA 206-2018 Smart city guideline of standardization via email in VALID please email coc@codeofchina.com for quotation
YD/T 1517-2006 Testing Method for Intelligent Terminal Equipment based on IP:IP Telephone Terminal via email in VALID please email coc@codeofchina.com for quotation
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