ITU ITU-T

http://en.wikipedia.org/wiki/ITU-T

 

International Telecommunication Union分三部分：        

Radiocommunication ( ITU-R)

Standardization ( ITU-T) ，前身是 CCITT

Development ( ITU-D)

Key standards published by ITU

• ASN.1 (Abstract Syntax Notation One)
• Coding of audio G.711 and G.72x series
• Coding of still images JPEG T.80 and JPEG 2000 T.800 series
• Coding of video coding H.262/MPEG2-Video and H.264/MPEG-4 AVC
• Construction, installation and protection of cables and other elements of outside plant, L-series
• Data communication over the telephone network, V-series
• Fax standards T.2 – T.4, T.30, T.37, T.38
• G.hn (Next generation wired home networking over powerlines, phonelines and coaxial cable)
• H.323 family of standards for multimedia and VoIP
• Interconnection rate harmonization, D-series
• International Emergency Preference Scheme E.106
• IMSI codes used in SIM cards E.212
• ISDN and PSTN/3G videoconferencing systems, H.320 and H.324
• ISDN (Integrated Services Digital Network) Q.931
• Open Systems Interconnection
• Optical Transport Network (OTN) G.709, G.798
• Passive optical networks (PON) G.983, G.984, G.987
• Public Key Infrastructure (PKI) X.509
• Public telecommunication numbering plan, E.164
• Security framework X.805
• Signalling System 7 Q.7xx series
• Standards relating to Quality of Service (QoS)
• Specification and Description Language
• Synchronous Digital Hierarchy (SDH) G.707 – G.803
• Wavelength-division multiplexing (WDM)
• X.25
• (x)DSL (Digital Subscriber Line) series of standards for broadband telecoms