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ITU-T Recommendations
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ITU-T Recommendations
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ITU-T Recommendations by series
Select a series of Recommendations
A series: Organization of the work of ITU-T
D series: Tariff and accounting principles and international telecommunication/ICT economic and policy issues
E series: Overall network operation, telephone service, service operation and human factors
F series: Non-telephone telecommunication services
G series: Transmission systems and media, digital systems and networks
H series: Audiovisual and multimedia systems
I series: Integrated services digital network
J series: Cable networks and transmission of television, sound programme and other multimedia signals
K series: Protection against interference
L series: Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant
M series: Telecommunication management, including TMN and network maintenance
N series: Maintenance: international sound programme and television-transmission circuits
O series: Specifications of measuring equipment
P series: Telephone transmission quality, telephone installations, local line networks
Q series: Switching and signalling, and associated measurements and tests
R series: Telegraph transmission
S series: Telegraph services terminal equipment
T series: Terminals for telematic services
U series: Telegraph switching
V series: Data communication over the telephone network
X series: Data networks, open system communications and security
Y series: Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities
Z series: Languages and general software aspects for telecommunication systems
T series
: Terminals for telematic services
T.0-T.19
: Facsimile – Framework
T.20-T.29
: Still-image compression – Test charts
T.30-T.39
: Facsimile – Group 3 protocols
T.40-T.49
: Colour representation
T.50-T.59
: Character coding
T.60-T.69
: Facsimile – Group 4 protocols
T.70-T.79
: Telematic services – Framework
T.80-T.89
: Still-image compression – JPEG-1, Bi-level and JBIG
T.90-T.99
: Telematic services – ISDN Terminals and protocols
T.100-T.109
: Videotext – Framework
T.120-T.149
: Data protocols for multimedia conferencing
T.150-T.159
: Telewriting
T.170-T.189
: Multimedia and hypermedia framework
T.190-T.199
: Cooperative document handling
T.300-T.399
: Telematic services – Interworking
T.400-T.429
: Open document architecture
T.430-T.449
: Document transfer and manipulation
T.500-T.509
: Document application profile
T.510-T.559
: Communication application profile
T.560-T.619
: Telematic services – Equipment characteristics
T.620-T.649
: General multimedia application frameworks
T.700-T.799
: User interfaces - Accessibility and human factors
T.800-T.829
: Still-image compression – JPEG 2000
T.830-T.849
: Still-image compression | JPEG XR
T.850-T.899
: Still-image compression – JPEG-1 extensions
T supplements
: Supplements to the Series T Recommendations
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