ITU-T – Sektor Normalizacji TelekomunikacjiITU (ang. International Telecommunication Union – Telecommunication Standardization Sector) (DawniejCCITT)
ITU-T zajmuje się tworzeniem standardów obejmujących wszystkie dziedzinytelekomunikacji, powstał 1 marca 1993 roku i zastąpił istniejący wówczas KomitetCCITT.
Członkami Sektora Normalizacji Telekomunikacji są, zgodnie zKonstytucją i KonwencjąITU:
- A –Organization of the work of ITU-T
- B –Means of expression: definitions, symbols, classification
- C –General telecommunication statistics
- D –General tariff principles
- E –Overall network operation, telephone service, service operation and human factors
- F –Non-telephone telecommunication services
- G –Transmission systems and media, digital systems and networks
- H –Audiovisual and multimedia systems
- I –Integrated services digital network –
- J –Cable networks and transmission of television, sound programme and other multimedia signals
- K –Protection against interference
- L –Construction, installation and protection of cables and other elements of outside plant
- M –TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits
- N –Maintenance: international sound programme and television transmission circuits
- O –Specifications of measuring equipment
- P –Telephone transmission quality, telephone installations, local line networks
- Q –Switching and signalling
- R –Telegraph transmission
- S –Telegraph services terminal equipment
- T –Terminals for telematic services
- U –Telegraph switching
- V –Data communication over the telephone network
- X –Data networks and open system communication
- Y –Global information infrastructure andinternet protocol aspects
- Z –Languages and general software aspects for telecommunication systems
