Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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GB/T 5438-1985 Characteristics and measuring methods for monophonic and stereophonic transmissions 180.0 via email in 1~3 business day valid
JT/T 627-2005 Technical requirements of VHF marine data communication system for inland waterway 105.0 via email in 1~3 business day valid
GB/T 13168-1991 General specification for 8MHz (1800ch) carrier systems on standardized 2.6/9.5mm coaxial cable pairs 120.0 via email in 1~3 business day abolished
YD/T 1991-2009 Technical requirements for N×40Gbit/s optical wavelength division multiplexing (WDM) systems 420.0 via email in 1~3 business day abolished
YD/T 985-1998 Regulations for Establishment of Communications Between Audiovisual Terminals With 3 Or More Digital Channels At Below 1930kbit/S 570.0 via email in 1~3 business day valid
GB/T 3383-1982 Telecommunication transmission unit; Decibel 30.0 via email in 1~3 business day valid
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 21645.11-2017 Technical requirements for Automatically Switched Optical Network(ASON)―Part 11:Path Computation Element (PCE) and protocol 930.0 via email in 1~10 business day valid
YD/T 1274-2003 Technical specification for optical Wavelength Divison Multiplexing (WDM) system 160×10Gb/s and 80×10Gb/s part 540.0 via email in 1~5 business day valid
GB/T 21645.3-2009 Technical requirements for automatically switched optical network—Part 3:Data communication network 450.0 via email in 1~3 business day valid
GB/T 18119-2000 Video coding for low bit rate communication 450.0 via email in 1~3 business day valid
GB/T 14733.11-1993 Terminology for telecommunications-Telecommnication 690.0 via email in 1~8 business day superseded
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
YD/T 1273-2003 Techincal specification for terminal equipment of optical Wavelength Division Multiplexing(WDM)——16×10Gb/s、32×10Gb/s parts 480.0 via email in 1~5 business day valid
GB/T 14731-2008 Synchronous digital hierarchy (SDH) bit rates 90.0 via email in 1~3 business day valid
GB/T 15409-2008 Frame structure for synchronous digital hierarchy signal 420.0 via email in 1~5 business day valid
GB/T 16813-1997 Technical specifications and test methods of the interface of radio paging system and PSTN 390.0 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
GB/T 16712-2008 Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks 3100.0 via email in 1~10 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
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