Committed to connecting the world
ITU
General Secretariat
Radiocommunication
Standardization
About ITU-T
Events
All Groups
Standards
Resources
BSG
Study Groups
Regional Presence
Join Us
MyWorkspace
Development
ITU Telecom
Members' Zone
Join ITU
ITU-T Recommendations
You are here
Home
>
ITU-T Recommendations
Share
Search by number:
Others:
Content search
Advanced search
Provisional name
Equivalent number
Formal description
Study Groups tree view
All SGs
TSAG
Study Group 2
Study Group 3
Study Group 5
Study Group 11
Study Group 12
Study Group 13
Study Group 15
Study Group 17
Study Group 20
Study Group 21
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
A series
: Organization of the work of ITU-T
A.1
:
Working methods for study groups of the ITU Telecommunication Standardization Sector
A.2
:
Presentation of contributions to the ITU Telecommunication Standardization Sector
Withdrawn:
A.4
: Communication process between the ITU Telecommunication Standardization Sector and forums and consortia
A.5
:
Generic procedures for including references to documents of other organizations in ITU-T Recommendations
Withdrawn:
A.6
: Cooperation and exchange of information between the ITU Telecommunication Standardization Sector and national and regional standards development organizations
A.7
:
Focus groups: Establishment and working procedures
A.8
:
Alternative approval process for new and revised ITU-T Recommendations
A.11
:
Publication of ITU-T Recommendations and World Telecommunication Standardization Assembly proceedings
A.12
:
Identification and layout of ITU-T Recommendations
A.13
:
Non-normative ITU-T publications, including Supplements to ITU-T Recommendations
A.18
:
Joint coordination activities: Establishment and working procedures
A.23
:
Collaboration with the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) on information technology
A.24
:
Collaboration and exchange of information with other organizations
A.25
:
Generic procedures for incorporating text between ITU-T and other organizations
A.31
:
Guidelines and coordination requirements for the organization of ITU-T seminars and workshops
A supplements
: Supplements to the Series A Recommendations
Follow us
Twitter
Facebook
YouTube
Flickr
Linkedin
Instagram
Soundcloud
Podcasts
Spotify
Spreaker
TikTok
