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YD/T 1348-2005 Techical requirement for access network--Asymmetric Digital Subscriber Line(ADSL) automatic testing system 870 (USD) via email in 1-8 business day VALID
YD/T 586-1992 75 (USD) via email in 1-3 business day VALID
YDB 008.1-2007 Signalling Control Interface Protocol for IP-QoS Part ⅠResource Control Protoco via email in VALID please email coc@codeofchina.com for quotation
YD/T 1576.3-2007 Testing Methods for 2GHz cdma2000 Digital Cellular Mobile Communication Network Equipment:Mobile Station Part Ⅲ Protocol Compatibility Test via email in ABOLISHED please email coc@codeofchina.com for quotation
YD/T 1568-2007 Technical Specification of 2GHz cdma2000 Digital Cellular Mobile Communication Network:Switching Subsystem via email in VALID please email coc@codeofchina.com for quotation
SJ 20701.3-1998 The interconnection and interoperability of field electronic systems for combined group army Interface for synchronous 16kb/s digital channel 90 (USD) via email in 1-3 business day VALID
YD/T 1374.5-2007 Technical Requirements for Iu Interface of 2GHz TD-SCDMA/WCDMA Digital Cellular Mobile Communication Network(Phase Ⅱ)Part 5:Data Transport and Transport Signalling via email in VALID please email coc@codeofchina.com for quotation
YD/T 1106-2001 900/1800MHz TDMA Digital Cellular Mobile Communication Network Technical Specification for GPRS(General Packet Radio Service)Base Station System-Serving GPRS Support Node (SGSN)Interface (Gb interface) 975 (USD) via email in 1-8 business day VALID
YD/T 1605-2007 Protocol Requirements of Peer to Peer Multimedia Messaging Service Interworking between Networks via email in VALID please email coc@codeofchina.com for quotation
YDN 056-1997 1545 (USD) via email in 1-10 business day
YDC 036-2004 800MHz CDMA 1X HRPD Technical specification AT Part 240 (USD) via email in 1-3 business day ABOLISHED
YD/T 873-1996 420 (USD) via email in 1-3 business day VALID
YD/T 891-1997 Interface between data terminal equipment(dte) and data circuit-terminating equipment(dce) for public data networks providing frame relay da 1500 (USD) via email in 1-10 business day VALID
YD/T 744-2009 Technical requirements and test methods for digital microwave telecommunication equipments(systems)of plesiochronous digital hierarchy (PDH) via email in VALID please email coc@codeofchina.com for quotation
YD/T 1290.3-2008 Technical Requirements of Peer to Peer Short Message Interworking between Networks Part3:Interworking between PLMN and PLMN 90 (USD) via email in 1-3 business day ABOLISHED
GB 3382-1982 780 (USD) via email in 1-8 business day ABOLISHED
YD/T 1409-2005 Adaptation layer test specification for No.7 signalling system interworking with IP-message transfer part (MTP)level 2 user adaptation layer (M2UA) 1560 (USD) via email in 1-10 business day VALID
YD/T 589-1992 220 (USD) via email in 1 business day SUPERSEDED
YD/T 1879-2009 Technical Requirements of Interworking devices for Softswitch Network via email in VALID please email coc@codeofchina.com for quotation
YD/T 1772-2008 Test Method for Access Network Equipment——Multi-Service Access Node(MSAN) 810 (USD) via email in 1-8 business day VALID
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