Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
Position: Search valid to be valid superseded to be superseded abolished to be abolished
Standard No. Title Price(USD) Delivery Status Add to Cart
YD/T 1267-2003 Technical specification for synchronization netwrok based on SDH transport network 820.0 via email in 1~8 business day valid
GB/T 2789-1981 Technical requirements for network interface for the analogue microwave relay communication systems 120.0 via email in 1~3 business day abolished
GB/T 15409-2008 Frame structure for synchronous digital hierarchy signal 420.0 via email in 1~5 business day valid
GB/T 15837-2008 Interface requirements for digital synchronization network 480.0 via email in 1~5 business day valid
GB/T 24367.1-2009 Technical requirements for automatically switched optical network (ASON) node— Part 1:Technical requirements for SDH-based ASON node 600.0 via email in 1~3 business day valid
YD/T 1266-2003 Test methods of protection schemes for SDH rings 765.0 via email in 1~8 business day valid
GB/T 17789-1999 Procedures for simultaneous transmission of data and digitally encoded voice signals over the PSTN or over 2-wire leased point-to-point telephone type circuits 270.0 via email in 1~3 business day valid
YD/T 2003-2009 Technical Requirements for Reconfigurable Optical Add Drop Multiplexing (ROADM) Equipment 630.0 via email in 1~3 business day superseded
GB/T 17114-1997 Requirement for 160kbit/s subscriber line digital multigain equipment joined to national public telecommunication network 250.0 via email in 1~3 business day abolished
GB/T 17904.2-1999 ISDN user-network interface data link layer specification and conformance testing method Part 2: Data link layer protocol conformance testing method 2010.0 via email in 1~3 business day valid
GB/T 28515.2-2021 Test method for automatically switched optical network(ASON)—Part 2:OTN-based ASON 990.0 via email in 1~10 business day valid
YD/T 1957.1-2009 Technical Requirements for Automatically Switched Optical Network (ASON) Node Part 1:Technical Requirements for SDH-based ASON Node 510.0 via email in 1~3 business day valid
YD/T 1810-2008 Testing Methods for SDH-Based MSTP Embedded With MPLS 600.0 via email in 1~3 business day valid
YD/T 1961-2009 Technical Requirements for SDH-based Multi-service Transport Platform (MSTP)--Interoperatibility 180.0 via email in 1~3 business day valid
YD/T 1992-2009 Test specifications for SDH-based multi-service transport platform (MSTP) - Interoperability 330.0 via email in 1~3 business day valid
GB/T 20185-2006 Optical interface requirements for equipments and systems relating to the synchronous digital hierarchy 240.0 via email in 1~3 business day valid
YD/T 1030-1999 Air Interface Technical Specifications of the 800MHz CDMA Digital Cellular Mobile Telecommunication Network 5340.0 via email in 1~10 business day valid
GB/T 13159-1991 Networking specifications for digital radio-relay sy-stems 250.0 via email in 1~3 business day abolished
YD/T 1959-2009 Technical Requirements for 2048kbit/s Optical Interface Between Relaying Protection Equipment and Multiplexer 150.0 via email in 1~3 business day valid
GB/T 13169-1991 General specification for 4MHz (960ch) carrier systems on standardized 1.2/4.4mm coaxial cable pairs 120.0 via email in 1~3 business day abolished


About Us   |    Contact Us   |    Terms of Service   |    Privacy   |    Cancellation & Refund Policy   |    Payment
Tel: +86-10-8572 5655 | Fax: +86-10-8581 9515 | Email: coc@codeofchina.com | QQ: 672269886
Copyright: Codeofchina Inc 2008-2020