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Period
2025-2028 ( 12)
2022-2024 ( 13)
2017-2021 ( 13)
2013-2016 ( 17)
2009-2012 ( 15)
2005-2008 ( 14)
2001-2004 ( 17)
1997-2000 ( 15)
1993-1996 ( 16)
1990-1994 ( 1)
1989-1992 ( 23)
1986-1990 ( 2)
1985-1988 ( 27)
1982-1986 ( 2)
1981-1984 ( 28)
1978-1981 ( 2)
1977-1980 ( 28)
1974-1978 ( 2)
1973-1976 ( 29)
1970-1974 ( 1)
1968-1972 ( 30)
1966-1970 ( 1)
1965-1968 ( 7)
1964-1968 ( 24)
1963-1966 ( 1)
1961-1964 ( 21)
1959-1963 ( 1)
1957-1960 ( 12)
1955-1957 ( 12)
1953-1956 ( 11)
1952-1954 ( 11)
1950-1951 ( 9)
1948-1953 ( 10)
1947-1948 ( 11)
1946-1947 ( 6)
1939-1940 ( 8)
1937-1938 ( 8)
1936-1948 ( 11)
1935-1936 ( 8)
1934-1936 ( 13)
1931-1934 ( 14)
1930-1931 ( 7)
1929-1931 ( 8)
1929-1930 ( 8)
1929 ( 7)
1928-1929 ( 9)
1927-1928 ( 8)
1926-1927 ( 7)
1926 ( 3)
1925-1926 ( 1)
1924-1925 ( 1)
Type
GAS ( 26)
Joint Study Group ( 35)
Plan Committee ( 35)
Sector Advisory Group ( 10)
Study Group ( 445)
Designation
AFRICA ( 1)
ASIA ( 1)
Africa Plan Committee ( 1)
CMBD ( 3)
CMTT ( 17)
CMV ( 8)
EUROPE ( 1)
GAS 10 / GAS X ( 1)
GAS 11 / GAS XI ( 1)
GAS 12 / GAS XII ( 1)
GAS 1 / GAS I ( 2)
GAS 2 / GAS II ( 1)
GAS 3 / GAS III ( 6)
GAS 4 / GAS IV ( 3)
GAS 5 / GAS V ( 4)
GAS 6 / GAS VI ( 1)
GAS 7 / GAS VII ( 3)
GAS 8 / GAS VIII ( 1)
GAS 9 / GAS IX ( 2)
LATIN AMERICA ( 1)
Latin America Plan Committee ( 1)
MP ( 1)
Mixed Committee ( 1)
PLAN ( 2)
Permanent Commission ( 2)
Plan Committee for Africa ( 4)
Plan Committee for Asia and Oceania ( 6)
Plan Committee for Europe and the Mediterranean Basin ( 6)
Plan Committee for Latin America ( 4)
RIT ( 1)
Review Committee ( 1)
SCV ( 5)
SG3RG-AFR ( 2)
SG3RG-AO ( 2)
SG3RG-LAC ( 2)
Special Study Group ( 1)
Special Study Group “S” ( 1)
Study Group 1 / Study Group I ( 15)
Study Group 9 / Study Group IX ( 11)
Study Group 1 / Study Group I ( 15)
Study Group 10 / Study Group X ( 17)
Study Group 11 / Study Group XI ( 23)
Study Group 12 / Study Group XII ( 17)
Study Group 13 / Study Group XIII ( 14)
Study Group 14 / Study Group XIV ( 5)
Study Group 15 / Study Group XV ( 17)
Study Group 16 / Study Group XVI ( 14)
Study Group 17 / Study Group XVII ( 11)
Study Group 18 / Study Group XVIII ( 3)
Study Group 2 / Study Group II ( 41)
Study Group 20 / Study Group XX ( 4)
Study Group 21 / Study Group XXI ( 1)
Study Group 3 /Study Group III ( 39)
Study Group 4 / Study Group IV ( 34)
Study Group 5 / Study Group V ( 36)
Study Group 5/Study Group V ( 1)
Study Group 6 / Study Group VI ( 33)
Study Group 6 and 7 / Study Groups VI and VII ( 1)
Study Group 7 / Study Group VII ( 28)
Study Group 8 / Study Group VIII ( 31)
Study Group 9 / Study Group IX ( 10)
Study Group Special A ( 4)
Study Group Special B ( 2)
Study Group Special C ( 4)
Study Group Special D ( 2)
TSAG ( 10)
World Plan Committee ( 7)
Study Group Name
Alphabetic telegraph apparatus and local connecting lines ( 1)
Automatic and semi-automatic telephone networks ( 4)
Broadband cable and TV ( 2)
CCIR/CCITT Joint Commission for television transmissions (administered by the CCIR) ( 3)
CCIR/CCITT Joint Study Group for television and sound transmission (administered by the CCIR) ( 6)
CCIR/CCITT Joint Study Group for vocabulary (administered by the CCIR) ( 2)
CCIR/CCITT Joint Study Group for vocabulary and related subjects (administered by the CCIR) ( 2)
CCITT Study Groups structure ( 1)
Certain questions of transmission ( 7)
Certain questions of transmission and maintenance ( 2)
Characteristics of telematic systems ( 3)
Circuit noise and availability (Joint CCITT/CCIR Study Group administered by CCITT) ( 2)
Circuit noise and availability (Joint CCITT/CCIR Study Group administered by the CCITT) ( 1)
Classification of opinions and distribution of questions ( 1)
Co-ordination of telephone and radio-telephony ( 4)
Co-ordination of wireless telephony and of telephony concerning technical questions arising in the international systems ( 2)
Code ( 1)
Coexistence ( 5)
Coexistence of telephone circuits and telegraph circuits in the same cable ( 1)
Committee on Operations ( 1)
Committee on Organization ( 1)
Construction of aerial telegraph conductors ( 1)
Coordination of radio and line transmission in long-distance telecommunications ( 2)
Coordination of radio-electricity and transmission over metallic lines in long-distance telecommunications ( 3)
Coordination of studies of line transmission and general transmission problems ( 1)
Data Communication networks ( 2)
Data communication over the telephone network ( 1)
Data networks and open system communications ( 1)
Data networks and telecommunication software (Merger of Study Group 7 and Study Group 10) ( 1)
Data transmission ( 5)
Data transmission over the telephone network ( 2)
Definition and operational aspects of telegraph and telematic services (facsimile, Teletex, Videotex, etc.) ( 1)
Definition, operation and quality of service aspects of telegraph, data transmission and telematic services (facsimile, Teletex, Videotex, etc.) ( 1)
Definitions and Symbols ( 3)
Definitions and symbols (Joint CCIR/CCITT Study Group administered by the CCIR) ( 4)
Definitions, Vocabulary, Symbols ( 1)
Digital networks including ISDN ( 1)
Digital networks ( 1)
Economic and social problems relating to telecommunication development ( 1)
Economic and technical aspects of the choice of switching systems ( 1)
Economic and technical aspects of the choice of transmission systems ( 3)
Economic and technical aspects of transition from an analogue to a digital telecommunication network ( 2)
Economic and technical comparison of transmission systems ( 3)
Economic and technical impact of implementing a regional satellite network ( 1)
Economic conditions and telecommunication development ( 3)
End-to-end transmission performance of networks and terminals ( 3)
Environment and climate change ( 1)
Environment, climate change and circular economy ( 1)
Establishment of the European Telegraph Network operated by start-stop apparatus ( 1)
European telegraph network operated by start-stop apparatus ( 1)
Facsimile telegraph transmission and apparatus ( 1)
Facsimile telegraph transmission and equipment ( 4)
Future networks including cloud computing, mobile and next-generation networks ( 2)
Future networks including mobile and NGN ( 1)
General Plan for the development of the International Telecommunication Network (CCITT/CCIR Joint Committee administered by the CCITT) ( 2)
General Plan for the development of the Regional Telecommunication Network in Africa (CCITT/CCIR Joint Committee administered by the CCITT) ( 2)
General Plan for the development of the Regional Telecommunication Network in Asia and Oceania (CCITT/CCIR Joint Committee administered by the CCITT) ( 3)
General Plan for the development of the Regional Telecommunication Network in Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT) ( 3)
General Plan for the development of the Regional Telecommunication Network in Latin America (CCITT/CCIR Joint Committee administered by the CCITT) ( 3)
General Plan for the development of the World Telecommunication Network (CCITT/CCIR Joint Committee administered by the CCITT) ( 1)
General coordination for operation and tariffs ( 1)
General methods of specification of the quality of transmission as well as questions concerning the planning, construction and maintenance of local transmitting and receiving system ( 2)
General methods of specification of the quality of transmission as well as questions concerning the planning, construction and maintenance of local transmitting and receiving systems (the chain of lines and equipment which connects either the calling subs ( 2)
General network aspects ( 2)
General plan for the development of the international network (Joint CCITT/CCIR Committee administered by the CCITT) ( 1)
General plan for the development of the international network ( 1)
General principles of international telephone operating; instructions for operators of the international telephone service ( 1)
General principles of international telephone tariffs; basis for the calculation of international telephone charges ( 2)
General tariff principles ( 2)
General tariff principles. Lease of telecommunication circuits ( 1)
General tariff principles; lease of telecommunication circuits ( 3)
IMT-2000 and beyond ( 1)
ISDN and telephone network switching and signalling ( 1)
ISDN ( 1)
Image transmission ( 1)
Integrated broadband cable networks and television and sound transmission ( 2)
Inter-American telecommunication network (Temporary Study Group; Joint CCITT/CCIR Study Group administered by the CCITT) ( 1)
International service of telegraph subscribers and rates relating thereto ( 2)
Internet of Things (IoT) and its applications including smart cities and communities (SC&C) [established by TSAG in June 2015] ( 1)
Internet of Things (IoT) and its applications including smart cities and communities (SC&C) ( 1)
Introduction of radio relay links into the general line telecommunication network. Linking-up of radio circuits to the general network ( 1)
Joint Study Group CCIR-CCIT for phototelegraphy (administered by the CCIT) ( 1)
Joint Study Group CCIR-CCITT for phototelegraphy (administered by the CCITT) ( 1)
Languages and general software aspects for telecommunication systems ( 2)
Languages and methods for telecommunications applications ( 1)
Languages for telecommunication applications ( 2)
Letter and graphical symbols for telephony ( 3)
Local networks ( 1)
Maintenance instructions for lines and circuits; apparatus and methods of measurement for use on lines; control principles for line transmission; periodical maintenance programmes ( 1)
Maintenance of lines, circuits and chains of circuits ( 1)
Maintenance of the general telecommunication network ( 2)
Maintenance ( 1)
Master reference system for telephone transmission, reference systems and working standards ( 2)
Mixed Committee for the general european toll plan ( 1)
Multi-protocol and IP-based networks and their internetworking ( 1)
Multimedia coding, systems and applications ( 3)
Multimedia services and systems ( 1)
Multimedia services, systems and terminals ( 1)
Multimedia terminals, systems and applications ( 1)
National automatic networks ( 2)
Network and service operation ( 1)
Network maintenance ( 1)
Network operation ( 3)
Networks, Technologies and Infrastructures for Transport, Access and Home ( 2)
New networks for data transmission ( 2)
Next generation networks ( 1)
Noise (Joint CCITT/CCIR Study Group administered by the CCITT) ( 4)
Operation ( 4)
Operation of telephone network and ISDN ( 1)
Operational aspects of service provision and telecommunication management ( 2)
Operational aspects of service provision and telecommunications management ( 1)
Operational aspects of service provision, networks and performance ( 2)
Operational methods and quality of service ( 1)
Operations ( 2)
Optical and other transport network infrastructures ( 1)
Optical and other transport networks ( 1)
Optical transport networks and access network infrastructures ( 1)
Outside plant ( 5)
Outside plant and related indoor installations ( 1)
Overall transmission problems; general characteristics of long-distance telecommunication circuits; constructional specifications; regulation of metallic telecommunication lines ( 1)
Performance and quality of service ( 1)
Performance, QoS and QoE ( 3)
Permanent Commission ( 2)
Phototelegraphy ( 4)
Phototelegraphy and facsimile ( 2)
Plan Committee for Africa (Joint CCITT/CCIR Study Group to be managed by CCITT) ( 1)
Plan Committee for Asia and Oceania (Joint CCITT/CCIR Study Group administered by the CCITT) ( 1)
Plan Committee for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group administered by the CCITT) ( 1)
Plan Committee for Latin America (Joint CCITT/CCIR Study Group administered by the CCITT) ( 1)
Planning data and forecasting methods ( 1)
Planning, construction and maintenance of lines connecting the two terminal trun exchanges in an international telecommunications ( 2)
Planning, construction and maintenance of lines connecting the two terminal trunk exchanges in an international telecommunication ( 2)
Primary power sources ( 2)
Primary sources of energy ( 1)
Protection ( 5)
Protection against corrosion and the composition of cable sheaths ( 1)
Protection against dangers and disturbances of electromagnetic origin ( 7)
Protection against disturbances originating outside telecommunication systems ( 1)
Protection against electromagnetic effects ( 1)
Protection against electromagnetic environment effects ( 5)
Protection and specifications of cable sheaths and poles ( 7)
Protection of cables against corrosion due to electrolysis or chemical action, and questions of the constitution of cable sheaths ( 1)
Protection of telegraph lines against strong currents ( 1)
Protection of telephone cables against corrosion due to electrolysis or chemical action ( 1)
Protection of telephone cables against corrosion due to electrolysis or chemical action from soil, and questions concerning the constitution of the sheathing of cables ( 5)
Protection of telephone cables against corrosion due to electrolysis or to chemical action ( 5)
Protection of telephone cables against electrolytic corrosion and chemical action ( 2)
Protection of telephone lines against disturbance from electric power installations ( 1)
Protection of telephone lines against disturbance from electrical power installations ( 5)
Protection of telephone lines against the disturbing influence from power installations ( 1)
Protection of telephone lines against the disturbing influence of power installations ( 4)
Protection of telephone lines against the disturbing influence of power installations or atmospheric discharges ( 2)
Provisional lists of technical telegraph terms (Recommendation No. 19) ( 1)
Pulse code modulation ( 2)
Quality of telegraph transmission, specification of channel equipments and directives for maintenance of telegraph channels ( 2)
Quality of transmission ( 2)
Questions having both a technical and operational character ( 2)
Questions of interest to telegraph users ( 1)
Reference systems for telephone transmission ( 2)
Relays ( 5)
Review Committee ( 1)
Review of the collection of CCIT Recommendations ( 1)
Revision of international graphical symbols for telephony ( 1)
Rules for leasing international circuits for private use ( 1)
Rural telecommunications ( 3)
SG11 - Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices ( 1)
SG12: Performance, quality of service (QoS) and quality of experience (QoE) ( 1)
SG13 - Future networks and emerging network technologies ( 1)
SG13: Future networks and emerging network technologies ( 1)
SG15 - Networks, technologies and infrastructures for transport, access and home ( 1)
SG15 - Networks, technologies and infrastructures for transport, access and home ( 1)
SG16 - Multimedia and related digital technologies ( 1)
SG17 - Security ( 2)
SG2 - Operational aspects of service provision and telecommunication management ( 1)
SG2 - Operational aspects of telecommunications and ICTs ( 1)
SG20 - Internet of Things, digital twins and smart sustainable cities and communities ( 1)
SG20 - Internet of things (IoT) and smart cities and communities (SC&C) ( 1)
SG21 - Technologies for multimedia, content delivery and cable television ( 1)
SG3 - Tariff and accounting principles and international telecommunication/ICT economic and policy issues ( 2)
SG5 - EMF, environment, climate action, sustainable digitalization, and circular economy ( 1)
SG9: Broadband cable and TV ( 1)
Security, languages and telecommunication software ( 1)
Security ( 3)
Semi-automatic and automatic telephone networks ( 1)
Services offered to users and rates other than telex rates ( 2)
Services ( 1)
Signaling and switching ( 5)
Signalling requirements and protocols ( 3)
Signalling requirements, protocols and test specifications ( 3)
Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices ( 1)
Specification of the quality of telephone transmission: systems connecting subscribers to their trunk exchanges ( 1)
Standard Reference System ( 2)
Standardization Committee for Vocabulary ( 2)
Standardization Committee for Vocabulary ( 3)
Standardization of carrier frequencies ( 1)
Standardization of carrier frequencies in harmonic telegraphy ( 1)
Standardization of telegraph devices ( 4)
Strategy for public data networks ( 1)
Strategy for the introduction of new non-voice telecommunication services ( 1)
Study Group 3 – Regional Group for Africa ( 2)
Study Group 3 – Regional Group for Asia and Oceania ( 2)
Study Group 3 – Regional Group for Latin America ( 1)
Study Group 3 – Regional Group for Latin America ( 1)
Study Group 8 Terminals for telematic services ( 2)
Switching and signalling ( 2)
Symbols ( 3)
TMN and network maintenance ( 1)
Tariff and accounting principles including related telecommunication economic and policy issues ( 5)
Tariff and accounting principles including related telecommunications economic and policy issues ( 1)
Tariff and accounting principles ( 1)
Tariff and accounting principles ( 2)
Tariffs ( 7)
Tariffs and operation ( 2)
Technical Committee ( 1)
Technical aspects of switching in the service of start-stop apparatus ( 2)
Technical aspects of telegraph apparatus ( 2)
Technical aspects of the establishment, operation and maintenance of telegraph channels ( 2)
Technical questions relating to telephone signalling and international telephone switching ( 1)
Telecommunication Standardization Advisory Group ( 10)
Telecommunication management ( 1)
Telecommunication management, including TMN ( 1)
Telecommunication plan for Africa (CCITT/CCIR Joint Committee administered by the CCITT) ( 2)
Telecommunication plan for Africa (Joint CCITT/CCIR Study Group administered by CCITT) ( 1)
Telecommunication plan for Asia and Oceania (CCITT/CCIR Joint Committee administered by the CCITT) ( 2)
Telecommunication plan for Asia and Oceania (Joint CCITT/CCIR Study Group administered by CCITT) ( 1)
Telecommunication plan for Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT) ( 1)
Telecommunication plan for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group administered by CCITT) ( 1)
Telecommunication plan for Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT) ( 1)
Telecommunication plan for Latin America (CCITT/CCIR Joint Committee administered by the CCITT) ( 1)
Telecommunication plan for Latin America (Joint CCITT/CCIR Study Group administered by CCITT) ( 1)
Telecommunication vocabulary, graphical symbols, letter symbols and universal decimal classification ( 1)
Telegraph and Telex switching ( 1)
Telegraph and data terminal equipment, local connecting lines ( 3)
Telegraph apparatus and local connecting lines. Facsimile and phototelegraphy ( 1)
Telegraph equipment and local connecting lines ( 2)
Telegraph networks and telegraph terminal equipment ( 1)
Telegraph networks and terminal equipment ( 2)
Telegraph operation and quality of service ( 1)
Telegraph operation and tariffs (telex service included) ( 5)
Telegraph switching ( 6)
Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels ( 4)
Telegraph, technical, general ( 1)
Telegraphy, general technique ( 1)
Telephone circuits ( 6)
Telephone operation ( 4)
Telephone operation and quality of service ( 2)
Telephone operation and tariffs ( 4)
Telephone signalling and switching ( 2)
Telephone switching and signalling ( 5)
Telephone tariffs ( 4)
Telephone transmission performance and local telephone networks ( 6)
Telephony Vocabulary ( 3)
Television and sound transmission (Joint CCIR/CCITT Study Group administered by the CCIR) ( 3)
Television and sound transmission (former CMTT) ( 1)
Television and sound transmission and integrated broadband cable networks ( 1)
Television and sound transmission ( 1)
Television transmission (Joint CCITT/CCIR Study Group administered by the CCIR) ( 3)
Television transmission (Joint CCITT/CCIR Study Group administered by the CCIR) ( 2)
Terminal equipment for telematic services (facsimile, Teletex, Videotex, etc.) ( 2)
Terminals for telematic services ( 1)
Theoretical determination of transmission speed ( 1)
Traffic and operating ( 3)
Traffic and operation ( 1)
Traffic and service ( 1)
Traffic, operation and tariffs ( 1)
Transmission and Maintenance ( 6)
Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic networks ( 2)
Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic telephone networks ( 1)
Transmission maintenance of international lines, circuits and chains of circuits ( 2)
Transmission performance of telephone networks and terminals ( 2)
Transmission speed ( 2)
Transmission systems ( 7)
Transmission systems and equipments ( 3)
Transport networks, systems and equipment ( 1)
Unification of the different fundamental ways of functioning of telegraph equipment ( 1)
Unification of rules concerning stock-exchange calls ( 1)
Universal decimal classification ( 1)
Vocabulary, symbols, classification ( 1)
World-wide semi-automatic and automatic network ( 2)
World-wide telecommunication plan (CCITT/CCIR Joint Committee administered by the CCITT) ( 2)
World-wide telecommunication plan (Joint CCITT/CCIR Study Group administered by CCITT) ( 2)
SG12 - Performance, quality of service and quality of experience ( 1)
SG5 - Environment, EMF, climate action & circular economy ( 1)
Country
Argentina ( 4)
Australia ( 9)
Austria ( 1)
Belgium ( 13)
Cameroon ( 1)
Canada ( 15)
China ( 8)
Czechoslovakia* ( 3)
Denmark ( 14)
Egypt ( 3)
France ( 98)
German Dem. Rep.* ( 1)
Germany ( 51)
Germany (Fed. Rep. of)* ( 19)
Ghana ( 2)
Hungary ( 5)
India ( 3)
Indonesia ( 1)
Iran (Islamic Republic of) ( 1)
Italy ( 34)
Japan ( 20)
Korea (Rep. of) ( 10)
Kuwait ( 2)
Lebanon ( 4)
Mali ( 1)
Mexico ( 6)
Morocco ( 3)
Netherlands ( 30)
Paraguay ( 1)
Peru ( 1)
Poland ( 3)
Russian Federation ( 4)
Saudi Arabia ( 7)
Senegal ( 5)
Spain ( 14)
Sweden ( 13)
Switzerland ( 34)
Syrian Arab Republic ( 1)
Togo ( 2)
Tunisia ( 3)
USSR* ( 2)
United Arab Emirates ( 2)
United Kingdom ( 70)
United States ( 44)
2025-2028
2022-2024
2017-2021
2013-2016
2009-2012
2005-2008
2001-2004
1997-2000
1993-1996
1990-1994
1989-1992
1986-1990
1985-1988
1982-1986
1981-1984
1978-1981
1977-1980
1974-1978
1973-1976
1970-1974
1968-1972
1966-1970
1965-1968
1964-1968
1963-1966
1961-1964
1959-1963
1957-1960
1955-1957
1953-1956
1952-1954
1950-1951
1948-1953
1947-1948
1946-1947
1939-1940
1937-1938
1936-1948
1935-1936
1934-1936
1931-1934
1930-1931
1929-1931
1929-1930
1929
1928-1929
1927-1928
1926-1927
1926
1925-1926
1924-1925
GAS
Joint Study Group
Plan Committee
Sector Advisory Group
Study Group
AFRICA
ASIA
Africa Plan Committee
CMBD
CMTT
CMV
EUROPE
GAS 10 / GAS X
GAS 11 / GAS XI
GAS 12 / GAS XII
GAS 1 / GAS I
GAS 2 / GAS II
GAS 3 / GAS III
GAS 4 / GAS IV
GAS 5 / GAS V
GAS 6 / GAS VI
GAS 7 / GAS VII
GAS 8 / GAS VIII
GAS 9 / GAS IX
LATIN AMERICA
Latin America Plan Committee
MP
Mixed Committee
PLAN
Permanent Commission
Plan Committee for Africa
Plan Committee for Asia and Oceania
Plan Committee for Europe and the Mediterranean Basin
Plan Committee for Latin America
RIT
Review Committee
SCV
SG3RG-AFR
SG3RG-AO
SG3RG-LAC
Special Study Group
Special Study Group “S”
Study Group 1 / Study Group I
Study Group 9 / Study Group IX
Study Group 1 / Study Group I
Study Group 10 / Study Group X
Study Group 11 / Study Group XI
Study Group 12 / Study Group XII
Study Group 13 / Study Group XIII
Study Group 14 / Study Group XIV
Study Group 15 / Study Group XV
Study Group 16 / Study Group XVI
Study Group 17 / Study Group XVII
Study Group 18 / Study Group XVIII
Study Group 2 / Study Group II
Study Group 20 / Study Group XX
Study Group 21 / Study Group XXI
Study Group 3 /Study Group III
Study Group 4 / Study Group IV
Study Group 5 / Study Group V
Study Group 5/Study Group V
Study Group 6 / Study Group VI
Study Group 6 and 7 / Study Groups VI and VII
Study Group 7 / Study Group VII
Study Group 8 / Study Group VIII
Study Group 9 / Study Group IX
Study Group Special A
Study Group Special B
Study Group Special C
Study Group Special D
TSAG
World Plan Committee
Alphabetic telegraph apparatus and local connecting lines
Automatic and semi-automatic telephone networks
Broadband cable and TV
CCIR/CCITT Joint Commission for television transmissions (administered by the CCIR)
CCIR/CCITT Joint Study Group for television and sound transmission (administered by the CCIR)
CCIR/CCITT Joint Study Group for vocabulary (administered by the CCIR)
CCIR/CCITT Joint Study Group for vocabulary and related subjects (administered by the CCIR)
CCITT Study Groups structure
Certain questions of transmission
Certain questions of transmission and maintenance
Characteristics of telematic systems
Circuit noise and availability (Joint CCITT/CCIR Study Group administered by CCITT)
Circuit noise and availability (Joint CCITT/CCIR Study Group administered by the CCITT)
Classification of opinions and distribution of questions
Co-ordination of telephone and radio-telephony
Co-ordination of wireless telephony and of telephony concerning technical questions arising in the international systems
Code
Coexistence
Coexistence of telephone circuits and telegraph circuits in the same cable
Committee on Operations
Committee on Organization
Construction of aerial telegraph conductors
Coordination of radio and line transmission in long-distance telecommunications
Coordination of radio-electricity and transmission over metallic lines in long-distance telecommunications
Coordination of studies of line transmission and general transmission problems
Data Communication networks
Data communication over the telephone network
Data networks and open system communications
Data networks and telecommunication software (Merger of Study Group 7 and Study Group 10)
Data transmission
Data transmission over the telephone network
Definition and operational aspects of telegraph and telematic services (facsimile, Teletex, Videotex, etc.)
Definition, operation and quality of service aspects of telegraph, data transmission and telematic services (facsimile, Teletex, Videotex, etc.)
Definitions and Symbols
Definitions and symbols (Joint CCIR/CCITT Study Group administered by the CCIR)
Definitions, Vocabulary, Symbols
Digital networks including ISDN
Digital networks
Economic and social problems relating to telecommunication development
Economic and technical aspects of the choice of switching systems
Economic and technical aspects of the choice of transmission systems
Economic and technical aspects of transition from an analogue to a digital telecommunication network
Economic and technical comparison of transmission systems
Economic and technical impact of implementing a regional satellite network
Economic conditions and telecommunication development
End-to-end transmission performance of networks and terminals
Environment and climate change
Environment, climate change and circular economy
Establishment of the European Telegraph Network operated by start-stop apparatus
European telegraph network operated by start-stop apparatus
Facsimile telegraph transmission and apparatus
Facsimile telegraph transmission and equipment
Future networks including cloud computing, mobile and next-generation networks
Future networks including mobile and NGN
General Plan for the development of the International Telecommunication Network (CCITT/CCIR Joint Committee administered by the CCITT)
General Plan for the development of the Regional Telecommunication Network in Africa (CCITT/CCIR Joint Committee administered by the CCITT)
General Plan for the development of the Regional Telecommunication Network in Asia and Oceania (CCITT/CCIR Joint Committee administered by the CCITT)
General Plan for the development of the Regional Telecommunication Network in Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT)
General Plan for the development of the Regional Telecommunication Network in Latin America (CCITT/CCIR Joint Committee administered by the CCITT)
General Plan for the development of the World Telecommunication Network (CCITT/CCIR Joint Committee administered by the CCITT)
General coordination for operation and tariffs
General methods of specification of the quality of transmission as well as questions concerning the planning, construction and maintenance of local transmitting and receiving system
General methods of specification of the quality of transmission as well as questions concerning the planning, construction and maintenance of local transmitting and receiving systems (the chain of lines and equipment which connects either the calling subs
General network aspects
General plan for the development of the international network (Joint CCITT/CCIR Committee administered by the CCITT)
General plan for the development of the international network
General principles of international telephone operating; instructions for operators of the international telephone service
General principles of international telephone tariffs; basis for the calculation of international telephone charges
General tariff principles
General tariff principles. Lease of telecommunication circuits
General tariff principles; lease of telecommunication circuits
IMT-2000 and beyond
ISDN and telephone network switching and signalling
ISDN
Image transmission
Integrated broadband cable networks and television and sound transmission
Inter-American telecommunication network (Temporary Study Group; Joint CCITT/CCIR Study Group administered by the CCITT)
International service of telegraph subscribers and rates relating thereto
Internet of Things (IoT) and its applications including smart cities and communities (SC&C) [established by TSAG in June 2015]
Internet of Things (IoT) and its applications including smart cities and communities (SC&C)
Introduction of radio relay links into the general line telecommunication network. Linking-up of radio circuits to the general network
Joint Study Group CCIR-CCIT for phototelegraphy (administered by the CCIT)
Joint Study Group CCIR-CCITT for phototelegraphy (administered by the CCITT)
Languages and general software aspects for telecommunication systems
Languages and methods for telecommunications applications
Languages for telecommunication applications
Letter and graphical symbols for telephony
Local networks
Maintenance instructions for lines and circuits; apparatus and methods of measurement for use on lines; control principles for line transmission; periodical maintenance programmes
Maintenance of lines, circuits and chains of circuits
Maintenance of the general telecommunication network
Maintenance
Master reference system for telephone transmission, reference systems and working standards
Mixed Committee for the general european toll plan
Multi-protocol and IP-based networks and their internetworking
Multimedia coding, systems and applications
Multimedia services and systems
Multimedia services, systems and terminals
Multimedia terminals, systems and applications
National automatic networks
Network and service operation
Network maintenance
Network operation
Networks, Technologies and Infrastructures for Transport, Access and Home
New networks for data transmission
Next generation networks
Noise (Joint CCITT/CCIR Study Group administered by the CCITT)
Operation
Operation of telephone network and ISDN
Operational aspects of service provision and telecommunication management
Operational aspects of service provision and telecommunications management
Operational aspects of service provision, networks and performance
Operational methods and quality of service
Operations
Optical and other transport network infrastructures
Optical and other transport networks
Optical transport networks and access network infrastructures
Outside plant
Outside plant and related indoor installations
Overall transmission problems; general characteristics of long-distance telecommunication circuits; constructional specifications; regulation of metallic telecommunication lines
Performance and quality of service
Performance, QoS and QoE
Permanent Commission
Phototelegraphy
Phototelegraphy and facsimile
Plan Committee for Africa (Joint CCITT/CCIR Study Group to be managed by CCITT)
Plan Committee for Asia and Oceania (Joint CCITT/CCIR Study Group administered by the CCITT)
Plan Committee for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group administered by the CCITT)
Plan Committee for Latin America (Joint CCITT/CCIR Study Group administered by the CCITT)
Planning data and forecasting methods
Planning, construction and maintenance of lines connecting the two terminal trun exchanges in an international telecommunications
Planning, construction and maintenance of lines connecting the two terminal trunk exchanges in an international telecommunication
Primary power sources
Primary sources of energy
Protection
Protection against corrosion and the composition of cable sheaths
Protection against dangers and disturbances of electromagnetic origin
Protection against disturbances originating outside telecommunication systems
Protection against electromagnetic effects
Protection against electromagnetic environment effects
Protection and specifications of cable sheaths and poles
Protection of cables against corrosion due to electrolysis or chemical action, and questions of the constitution of cable sheaths
Protection of telegraph lines against strong currents
Protection of telephone cables against corrosion due to electrolysis or chemical action
Protection of telephone cables against corrosion due to electrolysis or chemical action from soil, and questions concerning the constitution of the sheathing of cables
Protection of telephone cables against corrosion due to electrolysis or to chemical action
Protection of telephone cables against electrolytic corrosion and chemical action
Protection of telephone lines against disturbance from electric power installations
Protection of telephone lines against disturbance from electrical power installations
Protection of telephone lines against the disturbing influence from power installations
Protection of telephone lines against the disturbing influence of power installations
Protection of telephone lines against the disturbing influence of power installations or atmospheric discharges
Provisional lists of technical telegraph terms (Recommendation No. 19)
Pulse code modulation
Quality of telegraph transmission, specification of channel equipments and directives for maintenance of telegraph channels
Quality of transmission
Questions having both a technical and operational character
Questions of interest to telegraph users
Reference systems for telephone transmission
Relays
Review Committee
Review of the collection of CCIT Recommendations
Revision of international graphical symbols for telephony
Rules for leasing international circuits for private use
Rural telecommunications
SG11 - Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices
SG12: Performance, quality of service (QoS) and quality of experience (QoE)
SG13 - Future networks and emerging network technologies
SG13: Future networks and emerging network technologies
SG15 - Networks, technologies and infrastructures for transport, access and home
SG15 - Networks, technologies and infrastructures for transport, access and home
SG16 - Multimedia and related digital technologies
SG17 - Security
SG2 - Operational aspects of service provision and telecommunication management
SG2 - Operational aspects of telecommunications and ICTs
SG20 - Internet of Things, digital twins and smart sustainable cities and communities
SG20 - Internet of things (IoT) and smart cities and communities (SC&C)
SG21 - Technologies for multimedia, content delivery and cable television
SG3 - Tariff and accounting principles and international telecommunication/ICT economic and policy issues
SG5 - EMF, environment, climate action, sustainable digitalization, and circular economy
SG9: Broadband cable and TV
Security, languages and telecommunication software
Security
Semi-automatic and automatic telephone networks
Services offered to users and rates other than telex rates
Services
Signaling and switching
Signalling requirements and protocols
Signalling requirements, protocols and test specifications
Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices
Specification of the quality of telephone transmission: systems connecting subscribers to their trunk exchanges
Standard Reference System
Standardization Committee for Vocabulary
Standardization Committee for Vocabulary
Standardization of carrier frequencies
Standardization of carrier frequencies in harmonic telegraphy
Standardization of telegraph devices
Strategy for public data networks
Strategy for the introduction of new non-voice telecommunication services
Study Group 3 – Regional Group for Africa
Study Group 3 – Regional Group for Asia and Oceania
Study Group 3 – Regional Group for Latin America
Study Group 3 – Regional Group for Latin America
Study Group 8 Terminals for telematic services
Switching and signalling
Symbols
TMN and network maintenance
Tariff and accounting principles including related telecommunication economic and policy issues
Tariff and accounting principles including related telecommunications economic and policy issues
Tariff and accounting principles
Tariff and accounting principles
Tariffs
Tariffs and operation
Technical Committee
Technical aspects of switching in the service of start-stop apparatus
Technical aspects of telegraph apparatus
Technical aspects of the establishment, operation and maintenance of telegraph channels
Technical questions relating to telephone signalling and international telephone switching
Telecommunication Standardization Advisory Group
Telecommunication management
Telecommunication management, including TMN
Telecommunication plan for Africa (CCITT/CCIR Joint Committee administered by the CCITT)
Telecommunication plan for Africa (Joint CCITT/CCIR Study Group administered by CCITT)
Telecommunication plan for Asia and Oceania (CCITT/CCIR Joint Committee administered by the CCITT)
Telecommunication plan for Asia and Oceania (Joint CCITT/CCIR Study Group administered by CCITT)
Telecommunication plan for Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT)
Telecommunication plan for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group administered by CCITT)
Telecommunication plan for Europe and the Mediterranean Basin (CCITT/CCIR Joint Committee administered by the CCITT)
Telecommunication plan for Latin America (CCITT/CCIR Joint Committee administered by the CCITT)
Telecommunication plan for Latin America (Joint CCITT/CCIR Study Group administered by CCITT)
Telecommunication vocabulary, graphical symbols, letter symbols and universal decimal classification
Telegraph and Telex switching
Telegraph and data terminal equipment, local connecting lines
Telegraph apparatus and local connecting lines. Facsimile and phototelegraphy
Telegraph equipment and local connecting lines
Telegraph networks and telegraph terminal equipment
Telegraph networks and terminal equipment
Telegraph operation and quality of service
Telegraph operation and tariffs (telex service included)
Telegraph switching
Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels
Telegraph, technical, general
Telegraphy, general technique
Telephone circuits
Telephone operation
Telephone operation and quality of service
Telephone operation and tariffs
Telephone signalling and switching
Telephone switching and signalling
Telephone tariffs
Telephone transmission performance and local telephone networks
Telephony Vocabulary
Television and sound transmission (Joint CCIR/CCITT Study Group administered by the CCIR)
Television and sound transmission (former CMTT)
Television and sound transmission and integrated broadband cable networks
Television and sound transmission
Television transmission (Joint CCITT/CCIR Study Group administered by the CCIR)
Television transmission (Joint CCITT/CCIR Study Group administered by the CCIR)
Terminal equipment for telematic services (facsimile, Teletex, Videotex, etc.)
Terminals for telematic services
Theoretical determination of transmission speed
Traffic and operating
Traffic and operation
Traffic and service
Traffic, operation and tariffs
Transmission and Maintenance
Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic networks
Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic telephone networks
Transmission maintenance of international lines, circuits and chains of circuits
Transmission performance of telephone networks and terminals
Transmission speed
Transmission systems
Transmission systems and equipments
Transport networks, systems and equipment
Unification of the different fundamental ways of functioning of telegraph equipment
Unification of rules concerning stock-exchange calls
Universal decimal classification
Vocabulary, symbols, classification
World-wide semi-automatic and automatic network
World-wide telecommunication plan (CCITT/CCIR Joint Committee administered by the CCITT)
World-wide telecommunication plan (Joint CCITT/CCIR Study Group administered by CCITT)
SG12 - Performance, quality of service and quality of experience
SG5 - Environment, EMF, climate action & circular economy
Argentina
Australia
Austria
Belgium
Cameroon
Canada
China
Czechoslovakia*
Denmark
Egypt
France
German Dem. Rep.*
Germany
Germany (Fed. Rep. of)*
Ghana
Hungary
India
Indonesia
Iran (Islamic Republic of)
Italy
Japan
Korea (Rep. of)
Kuwait
Lebanon
Mali
Mexico
Morocco
Netherlands
Paraguay
Peru
Poland
Russian Federation
Saudi Arabia
Senegal
Spain
Sweden
Switzerland
Syrian Arab Republic
Togo
Tunisia
USSR*
United Arab Emirates
United Kingdom
United States
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CCIF / CCIT / CCITT / ITU-T Study Groups
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565
Period
Sector
Type
Designation
Study Group Name
Chairperson
Country
2025-2028
ITU-T
Study Group
SCV
Standardization Committee for Vocabulary
Rim Belhaj
Tunisia
2025-2028
ITU-T
Study Group
Study Group 11
SG11 - Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices
Mr. Tejpal Singh
India
2025-2028
ITU-T
Study Group
Study Group 12
SG12 - Performance, quality of service and quality of experience
Ms. Tania Villa Trápala
Mexico
2025-2028
ITU-T
Study Group
Study Group 13
SG13 - Future networks and emerging network technologies
Mr. Kazunori Tanikawa
Japan
2025-2028
ITU-T
Study Group
Study Group 15
SG15 - Networks, technologies and infrastructures for transport, access and home
Mr. Glenn Parsons
Canada
2025-2028
ITU-T
Study Group
Study Group 17
SG17 - Security
Mr. Arnaud Taddei
United Kingdom
2025-2028
ITU-T
Study Group
Study Group 2
SG2 - Operational aspects of telecommunications and ICTs
Ms. Ena Dekanic
United States
2025-2028
ITU-T
Study Group
Study Group 20
SG20 - Internet of Things, digital twins and smart sustainable cities and communities
Mr. Hyoung Jun Kim
Korea (Rep. of)
2025-2028
ITU-T
Study Group
Study Group 21
SG21 - Technologies for multimedia, content delivery and cable television
Mr. Zhong (Noah) Luo
China
2025-2028
ITU-T
Study Group
Study Group 3
SG3 - Tariff and accounting principles and international telecommunication/ICT economic and policy issues
Mr. Ahmed Said
Egypt
2025-2028
ITU-T
Study Group
Study Group 5
SG5 - Environment, EMF, climate action & circular economy
Mr. Dominique Würges
France
2025-2028
ITU-T
Sector Advisory Group
TSAG
Telecommunication Standardization Advisory Group
Mr. Abdurahman M. Al Hassan
Saudi Arabia
2022-2024
ITU-T
Study Group
SCV
Standardization Committee for Vocabulary
Rim Belhaj
Tunisia
2022-2024
ITU-T
Study Group
Study Group 11
Signalling requirements, protocols, test specifications and combating counterfeit telecommunication/ICT devices
Ritu Ranjan Mittar
India
2022-2024
ITU-T
Study Group
Study Group 12
SG12: Performance, quality of service (QoS) and quality of experience (QoE)
Tania Villa
Mexico
2022-2024
ITU-T
Study Group
Study Group 13
SG13: Future networks and emerging network technologies
Kazunori Tanikawa
Japan
2022-2024
ITU-T
Study Group
Study Group 15
SG15 - Networks, technologies and infrastructures for transport, access and home
Glenn Parsons
Canada
2022-2024
ITU-T
Study Group
Study Group 16
SG16 - Multimedia and related digital technologies
Noah Luo
China
2022-2024
ITU-T
Study Group
Study Group 17
SG17 - Security
Heung Youl Youm
Korea (Rep. of)
2022-2024
ITU-T
Study Group
Study Group 2
SG2 - Operational aspects of service provision and telecommunication management
Phil Rushton
United Kingdom
2022-2024
ITU-T
Study Group
Study Group 20
SG20 - Internet of things (IoT) and smart cities and communities (SC&C)
Hyoung Jun Kim
Korea (Rep. of)
2022-2024
ITU-T
Study Group
Study Group 3
SG3 - Tariff and accounting principles and international telecommunication/ICT economic and policy issues
Ahmed Said
Egypt
2022-2024
ITU-T
Study Group
Study Group 5
SG5 - EMF, environment, climate action, sustainable digitalization, and circular economy
Dominique Würges
France
2022-2024
ITU-T
Study Group
Study Group 9
SG9: Broadband cable and TV
Satoshi Miyaji
Japan
2022-2024
ITU-T
Sector Advisory Group
TSAG
Telecommunication Standardization Advisory Group
Mr. Abdurahman M. Al Hassan
Saudi Arabia
2017-2021
ITU-T
Study Group
SCV
Standardization Committee for Vocabulary
Tong Wu
China
2017-2021
ITU-T
Study Group
Study Group 11
Signalling requirements, protocols and test specifications
Andrey Kucheryavy
Russian Federation
2017-2021
ITU-T
Study Group
Study Group 12
Performance, QoS and QoE
Kwame Baah-Acheamfuor
Ghana
2017-2021
ITU-T
Study Group
Study Group 13
Future networks including cloud computing, mobile and next-generation networks
Leo Lehmann
Switzerland
2017-2021
ITU-T
Study Group
Study Group 15
Networks, Technologies and Infrastructures for Transport, Access and Home
Steve Trowbridge
United States
2017-2021
ITU-T
Study Group
Study Group 16
Multimedia coding, systems and applications
Zhong Luo
China
2017-2021
ITU-T
Study Group
Study Group 17
Security
Heung Youl Youm
Korea (Rep. of)
2017-2021
ITU-T
Study Group
Study Group 2
Operational aspects of service provision and telecommunications management
Phil Rushton
United Kingdom
2017-2021
ITU-T
Study Group
Study Group 20
Internet of Things (IoT) and its applications including smart cities and communities (SC&C)
Nasser Al Marzouqi
United Arab Emirates
2017-2021
ITU-T
Study Group
Study Group 3
Tariff and accounting principles including related telecommunication economic and policy issues
Seiichi Tsugawa
Japan
2017-2021
ITU-T
Study Group
Study Group 5
Environment, climate change and circular economy
Maria Victoria Sukenik (2017-2019) / Nevine Tewfik (May 2020) / Shuguang Qi (Oct. 2020-2021)
Argentina / China
2017-2021
ITU-T
Study Group
Study Group 9
Broadband cable and TV
Satoshi Miyaji
Japan
2017-2021
ITU-T
Sector Advisory Group
TSAG
Telecommunication Standardization Advisory Group
Bruce Gracie
Canada
2013-2016
ITU-T
Study Group
Review Committee
Review Committee
Mr. Yoichi Maeda
Japan
2013-2016
ITU-T
Study Group
SCV
Standardization Committee for Vocabulary
Mr. Imad Hoballah
Lebanon
2013-2016
ITU-T
Study Group
SG3RG-AFR
Study Group 3 – Regional Group for Africa
Mr. Abossé Akue-Kpakpo (Togo) / Mr. Saliou Toure (Senegal)
Togo / Senegal
2013-2016
ITU-T
Study Group
SG3RG-AO
Study Group 3 – Regional Group for Asia and Oceania
Mr. Byoung Nam Lee
Korea (Rep. of)
2013-2016
ITU-T
Study Group
SG3RG-LAC
Study Group 3 – Regional Group for Latin America
Mr. Tito Lopez
Paraguay
2013-2016
ITU-T
Study Group
Study Group 11
Signalling requirements, protocols and test specifications
Mr. Wei Feng
China
2013-2016
ITU-T
Study Group
Study Group 12
Performance, QoS and QoE
Mr. Kwame Baah-Acheamfuor
Ghana
2013-2016
ITU-T
Study Group
Study Group 13
Future networks including cloud computing, mobile and next-generation networks
Mr. Chae-Sub Lee
Korea (Rep. of)
2013-2016
ITU-T
Study Group
Study Group 15
Networks, Technologies and Infrastructures for Transport, Access and Home
Mr. Steve Trowbridge
United States
2013-2016
ITU-T
Study Group
Study Group 16
Multimedia coding, systems and applications
Mr. Yushi Naito
Japan
2013-2016
ITU-T
Study Group
Study Group 17
Security
Mr. Arkadiy Kremer
Russian Federation
2013-2016
ITU-T
Study Group
Study Group 2
Operational aspects of service provision and telecommunication management
Ms. Sherif Guinena
Egypt
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