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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 514-1998 Tchnical requirements and test methods for interface between non-vioce subscriber terminal and public telephone network 135 (USD) via email in 1-3 business day VALID
YDB 141-2013 Requirements and Measurement Methods of Electromagnetic Compatibility for the PoE port of Information Technology Equipment via email in VALID please email coc@codeofchina.com for quotation
YD/T 2849-2015 via email in VALID please email coc@codeofchina.com for quotation
YD/T 951-1998 Characteristics and protocols for terminals for telematic services in ISDN 885 (USD) via email in 1-8 business day VALID
YD/T 828.11-1996 165 (USD) via email in 1-3 business day VALID
YD/T 521-1992 345 (USD) via email in 1-3 business day VALID
YD/T 1722.1-2007 Technical Specification for 2GHz TD-SCDMA Digital Cellular Mobile Communication Network:HSDPA Uu Interface Layer 2 Part 1:MAC Protocol via email in ABOLISHED please email coc@codeofchina.com for quotation
YD/T 1431-2006 Technical requirement and testing methods for the charging performance of exchange-mobile intelligent network part 315 (USD) via email in 1-3 business day
YD/T 1281-2003 Iocal telecommunications cable for broadband applications polyolefin insulated copper conductors laminated aluminium polyethylene sheath 315 (USD) via email in 1-3 business day VALID
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 1261-2003 The technical specification of CAMEL3:CAMEL Application Part (CAP)for 900/1800MHz TDMA digital cellular mobile telecommunication network 2985 (USD) via email in 1-10 business day VALID
YD/T 648-1994 Quality grading criteria of 620kHz balanced-type variable attenuator 180 (USD) via email in 1 business day ABOLISHED
YD/T 5015-1995 Engineering Drawing and Graphical Symbols for Communication Projects Diagrams 1305 (USD) via email in 1-10 business day ABOLISHED
YD/T 2577-2013 via email in VALID please email coc@codeofchina.com for quotation
YD/T 1550.4-2007 Technical Specification for 2GHz WCDMA Digital Cellular Mobile Communication Network Iub Interface(Phase I)Part 4:NBAP 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 105 (USD) via email in 1-3 business day VALID
YD 5100-2002 Interim Provisions for Test of Anti-seismic Performances of 900/1800MHz TDMA Digital Cellular Mobile Telecommunication of Base Transceiver Station Equipment via email in ABOLISHED please email coc@codeofchina.com for quotation
YD/T 1228-2002 900/1800MHz TDMA digital cellular mobile communication network GPRS(General Packet Radio Service)test methods of Tunnelling protocol 630 (USD) via email in 1-5 business day VALID
YD/T 848-1996 450 (USD) via email in 1-3 business day VALID
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