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Position: Search valid to be valid superseded to be superseded abolished to be abolished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 3376-1982 Inband pulsing single frequency line signalling system for telephone automatic switching network 90.0 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 1938.2-2009 Test method for Session Initiation Protocol (SIP) Part 2:SIPs Applications about Call Control Basedon Softswitch Network 780.0 via email in 1~3 business day valid
GB/T 14401-1993 between mobile station and base station and mobile services switching centre in public land mobile communication network at 450MHz band 450.0 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 913-1997 Digital subscriber signalling system No.1(DSS1)-typical DSS1 service indicator codings for ISDN telecommunications services 630.0 via email in 1~3 business day valid
GB/T 28524-2012 Media Gateway Control Protocol(MGCP) 1260.0 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
YD/T 1309-2004 Bearer independent call bearer control specification 1500.0 via email in 1~3 business day valid
YD/T 1193.1-2002 Bearer independent call control specification-Part 1:functional of BICC 165.0 via email in 1~3 business day valid
GB/T 14733.4-2012 Terminology for telecommunication switching and signalling in telecommunication 810.0 via email in 1~3 business day valid
YD/T 1296-2003 Technical specification for public IP voice switch 390.0 via email in 1~5 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
YD/T 1918-2009 Test Methods for the Adaptation Layer of ISDN Signalling Interworking with IP 750.0 via email in 1~3 business day valid
GB 3380-1982 Ringing and tone for telephone automatic switching network 90.0 via email in 1~3 business day valid
YDC 048-2007 Overall Technical Specification for ENUM 750.0 via email in 1~3 business day valid
YD/T 1936-2009 Technical Requirements for Session Description Protocol 480.0 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 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
YD/T 1304-2004 Test specification for national No.7 signalling system - Message Transfer Part (MTP)and Telephone User Part (TUP) 4350.0 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