Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
LoginRegister
Position: Search valid to be valid superseded to be superseded abolished to be abolished
Standard No. Title Price(USD) Delivery Status Add to Cart
GB 3380-1982 Ringing and tone for telephone automatic switching network 90.0 via email in 1~3 business day valid
GB/T 28506-2012 Technical specification for national No.7 signalling system—GSM mobile telephone user part (MTUP) 990.0 via email in 1~3 business day valid
GB 3971.2-1983 Interoffice junction digital line signalling system for telephone automatic switching network 150.0 via email in 1~3 business day valid
GB/T 28524-2012 Media Gateway Control Protocol(MGCP) 1260.0 via email in 1~8 business day valid
GB/T 29198-2012 Technical requirements of adaptation layer of No.7 signalling interworking with IP—MTP2 peer-to-peer adaptation layer 460.0 via email in 1~3 business day valid
GB/T 5443-1985 The test methods for the technical specifications of ringing and tone for automatic telephone switching network 90.0 via email in 1~3 business day valid
GB 3376-1982 Inband pulsing single frequency line signalling system for telephone automatic switching network 90.0 via email in 1~3 business day valid
YD/T 1522.4-2009 Technical Requirements for Session Initiation Protocol Part 4 SIPs Applications about call control Based on Softswitch Network 345.0 via email in 1~3 business day valid
YD/T 1684-2007 Technical Requirements and Testing Methods for the Billing of the Digital Cellular Mobile Telecommunication Network Point to Point Short Message Service 270.0 via email in 1~3 business day superseded
GB/T 5442-1985 The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network 120.0 via email in 1~3 business day valid
YD/T 1662-2007 Testing Methods for National No.7 Signalling System——GSM Mobile Telephone User Part (MTUP) 1050.0 via email in 1~3 business day valid
GB/T 28505-2012 Technical specification of national No.7 signalling system 2 Mbit/s high speed link 330.0 via email in 1~3 business day valid
GB/T 5444-1985 The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network 90.0 via email in 1~3 business day valid
YD/T 928-1997 Technical specification for ISDN PABXs 255.0 via email in 1~3 business day valid
GB 3377-1982 Multi frequency register signalling system for telephone antomatic switching network 270.0 via email in 1~3 business day valid
GB/T 28500-2012 Technical requirements of 900/1 800 MHz TDMA digital cellular mobile network signaling system No.7 ISUP 1740.0 via email in 1~3 business day valid
GB/T 28502-2012 Technical requirement of interworking between No.7 signalling and IP 600.0 via email in 1~3 business day valid
YD/T 1938.1-2009 Test method for Session Initiation Protocol (SIP) Part 1:Basic Session Initiation Protocol 4470.0 via email in 1~3 business day valid
YD/T 2042-2009 IPv6 network equipment security requirements——Ethernet switch with routing capability 240.0 via email in 1~3 business day valid
GA 330-2001 Transmission technology protocol of alarm for 351 MHz 90.0 via email in 1~3 business day valid
About Us | Contact Us | Payment
Tel: +86-10-8572 5655 | Fax: +86-10-8581 9515 | Email: coc@codeofchina.com | Send me a messageQQ: 672269886
Copyright: Codeofchina Inc 2008-2020