CCITT and ITU-T Study Groups (1956

Standardization work is carried out by the technical Study Groups (SGs) in which representatives of the ITU-T membership develop Recommendations (standards) for the various fields of international telecommunications.

The SGs drive their work primarily in the form of study Questions. Each of these addresses technical studies in a particular area of telecommunication standardization. Each SG has a SG Chairman and a number of vice-chairmen appointed by the World Telecommunication Standardization Assembly (WTSA).

1956 - 1960 | 1961 - 1964 | 1965 - 1968 | 1969 - 1972 | 1973 - 1976 | 1977 - 1980 | 1981 - 1984 | 1985 - 1988 | 1989 - 1992 |

1993 - 1996 | 1997 - 2000 | 2001 - 2004 | 2005 - 2008 | 2009 - 2012 | 2013 - 2016 | 2017 - 2020

Period 1956 - 1960

Study Group	Name	Chairman
Study Group 1	Coordination of studies of line transmission and general transmission problems	Mr. G.H. Bast (Netherlands)
Study Group 2	General coordination for operation and tariffs	Mr. A. Langenberger (Switzerland)
Study Group 3	Introduction of radio relay links into the general line telecommunication network. Linking-up of radio circuits to the general network	Mr. V. Gori (Italy)
Study Group 4	Maintenance of the general telecommunication network	Mr. J. Valloton (Switzerland)
Study Group 5	Protection against dangers and disturbances of electromagnetic origin	Mr. L.J. Collet (France)
Study Group 6	Protection and specifications of cable sheaths and poles	Mr. H.L. Halstrom (Denmark)
Study Group 7	Definitions, Vocabulary, Symbols	Mr. G. Gella (Spain)
Study Group 8	Telegraph apparatus and local connecting lines. Facsimile and phototelegraphy	Mr. P. Pellé (France)
MP	Joint Study Group CCIR-CCITT for phototelegraphy	Mr. P. Pellé (France)
Study Group 9	Quality of telegraph transmission, specification of channel equipments and directives for maintenance of telegraph channels	Mr. H.L. van Lommel (Netherlands)
Study Group 10	Telegraph and Telex switching	Mr. E.H. Jolley (United Kingdom)
Study Group 11	Telephone signalling and switching	Mr. D.A. Barron (United Kingdom)
Study Group 12	Telephone transmission quality and local telephone networks	Mr. G. Swedenborg (Sweden)
PLAN	General plan for the development of the international network	Mr. Antinori (Italy)

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Period 1961 - 1964

Study Group	Name	Chairman
Study Group I	Telegraph operation and tariffs (telex service included)	Mr. T. Perry (Netherlands)
Study Group II	Telephone operation and tariffs	Mr. G. Terras (France)
Study Group III	General tariff principles. Lease of telecommunication circuits	Mr. A. Langenberger (Switzerland)
Study Group IV	Maintenance of the general telecommunication network	Mr. J. Valloton (Switzerland)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. H. Riedel (F.R. of Germany)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. H.L. Halstrom (Denmark)
Study Group VII	Definitions and Symbols	Mr. G. Gella (Spain)
Study Group VIII	Alphabetic telegraph apparatus and local connecting lines	Mr. R.D. Kerr (Australia)
Study Group IX	Quality of telegraph transmission, specification of channel equipments and directives for maintenance of telegraph channels	Mr. R. Roquet (France)
Study Group X	Telegraph switching	Mr. Jansen (Netherlands)
Study Group XI	Telephone signalling and switching	Mr. W.J.E. Tobin (United Kingdom)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. G. Swedenborg (Sweden)
Study Group XIII	Semi-automatic and automatic telephone networks	Mr. M. Lambiotte (Belgium)
Study Group XIV	Facsimile telegraph transmission and apparatus	Mr. W. Fijalkowski (Poland)
Study Group XV	Transmission systems	Mr. F. Job (France)
Study Group XVI	Telephone circuits	Mr. R.H. Franklin (United Kingdom)
Study Group Special A	Data transmission	Mr. J. Rhodes (United Kingdom)
Study Group Special B	World-wide semi-automatic and automatic network	Mr. W.E. Bloecker (United States)
Study Group Special C	Noise (Joint CCITT/CCIR Study Group under the administration of CCITT)	Mr. H. Williams (United Kingdom)
CMTT	Television transmission (Joint CCITT/CCIR Study Group under the administration of CCIR)	Mr. Y. Angel (France)
RIT	Inter-American telecommunication network (Temporary Study Group; Joint CCITT/CCIR Study Group under the administration of CCITT)	Mr. C. Núñez (Mexico)
PLAN	General plan for the development of the international network (Joint CCITT/CCIR Committee under the administration of CCITT)	Mr. Antinori (Italy)

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Period 1965 - 1968

Study Group	Name	Chairman
Study Group I	Telegraph operation and tariffs (telex service included)	Mr. R. Vargues (France)
Study Group II	Telephone operation and tariffs	Mr. R. Rütschi (Switzerland)
Study Group III	General tariff principles; lease of telecommunication circuits	Mr. P.F. Eriksen (Denmark)
Study Group IV	Maintenance of lines, circuits and chains of circuits	Mr. J. Valloton (Switzerland)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. H. Riedel (F.R. of Germany)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. H.L. Halström (Denmark)
Study Group VII	Definitions and Symbols	Mr. G. Gella Iturriaga (Spain)
Study Group VIII	Telegraph equipment and local connecting lines	Mr. Baggenstos (Switzerland)
Study Group IX	Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels	Mr. P. Bassole (France)
Study Group X	Telegraph switching	Mr. A. Jansen (Netherlands)
Study Group XI	Telephone switching and signalling	Mr. W.J.E. Tobin (United Kingdom)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. F. Kroutl (Czechoslovakia)
Study Group XIII	Automatic and semi-automatic telephone networks	Mr. M. Lambiotte (Belgium)
Study Group XIV	Facsimile telegraph transmission and equipment	Mr. H. Bitter (F.R. of Germany)
Study Group XV	Transmission systems	Mr. F. Job (France)
Study Group XVI	Telephone circuits	Mr. R.H. Franklin (United Kingdom)
Study Group Special A	Data transmission	Mr. J. Rhodes (United Kingdom)
Study Group Special B	World-wide semi-automatic and automatic network	Mr. E.C. Laird (United States)
Study Group Special C	Noise (Joint CCITT/CCIR Study Group under the administration of CCITT)	Mr. H. Williams (United Kingdom)
CMTT	Television transmission (Joint CCITT/CCIR Study Group under the administration of CCIR)	Mr. Y. Angel (France)
PLAN	General plan for the development of the international network (Joint CCITT/CCIR Committee under the administration of CCITT)	Mr. A. Bigi (Italy)
AFRICA	Plan Committee for Africa (Joint CCITT/CCIR Study Group to be managed by CCITT)	Mr. M. Mili (Tunisia)
ASIA	Plan Committee for Asia and Oceania (Joint CCITT/CCIR Study Group to be managed by CCITT)	Mr. C.P. Vasudevan (India)
LATIN AMERICA	Plan Committee for Latin America (Joint CCITT/CCIR Study Group to be managed by CCITT)	Mr. C. Nuñez-A. (Mexico)
EUROPE	Plan Committee for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group to be managed by CCITT)	Mr. T. Noat (France)

Special Autonomous Groups

GAS 1	National automatic networks	Mr. E.R. Banks (Australia)
GAS 2	Local networks	Mr. Sundin (Sweden)
GAS 3	Economic and technical comparison of transmission systems	Mr. M. Ben Abdellah (Morocco)
GAS 4	Primary power sources	(Canada)
GAS 5	Economic conditions and telecommunication development	Mr. Garbe (F.R. of Germany)

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Period 1969 - 1972

Study Group	Name	Chairman
Study Group I	Telegraph operation and tariffs (telex service included)	Mr. A. Gomes (United States)
Study Group II	Telephone operation and tariffs	Mr. R. Rütschi (Switzerland)
Study Group III	General tariff principles; lease of telecommunication circuits	Mr. L. Burtz (France)
Study Group IV	Transmission maintenance of international lines, circuits and chains of circuits	Mr. J. Valloton (Switzerland)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. H. Riedel (F.R. of Germany)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. Walters (United Kingdom)
Study Group VII	Definitions and Symbols	Mr. Ducommun (Switzerland)
Study Group VIII	Telegraph equipment and local connecting lines	Mr. G.Baggenstos (Switzerland)
Study Group IX	Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels	Mr. R. Brown (Australia)
Study Group X	Telegraph switching	Mr. A. Jansen (Netherlands)
Study Group XI	Telephone switching and signalling	Mr. A. Jouty (France)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. F. Kroutl (Czechoslovakia)
Study Group XIII	Automatic and semi-automatic telephone networks	Mr. A. Newstead (Australia)
Study Group XIV	Facsimile telegraph transmission and equipment	Mr. H. Bitter (F.R. of Germany)
Study Group XV	Transmission systems	Mr. F. Job (France)
Study Group XVI	Telephone circuits	Mr. J. Billen (United Kingdom)
Study Group Special A	Data transmission	Mr. J. Rhodes (United Kingdom)
Study Group Special C	Noise (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. R. Kaiser (F.R of Germany)
Study Group Special D	Pulse code modulation	Mr. R. Boyd (United States)
CMTT	Television transmission (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. Y. Angel (France)
World Plan Committee	World-wide telecommunication plan (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. A. Bigi (Italy)
Africa Plan Committee	Telecommunication plan for Africa (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. L. Dia (Senegal)
Plan Committee for Asia and Oceania	Telecommunication plan for Asia and Oceania (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. A. Zaidan (Saudi Arabia)
Latin America Plan Committee	Telecommunication plan for Latin America (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. C. Nuñez-A. (Mexico)
Plan Committee for Europe and the Mediterranean Basin	Telecommunication plan for Europe and the Mediterranean Basin (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. T. Noat (France)

Special Autonomous Groups

GAS 3	Economic and technical comparison of transmission systems	Mr. M. Aoud (Morocco)
GAS 4	Primary power sources	Mr. F. Bentley (Canada)
GAS 5	Economic conditions and telecommunication development	Mr. H. Longequeue (France)

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Period 1973 - 1976

Study Group	Name	Chairman
Study Group I	Telegraph operation and tariffs (telex service included)	Mr. S.R.V. Paramor (United Kingdom)
Study Group II	Telephone operation and tariffs	Mr. R. Rütschi (Switzerland)
Study Group III	General tariff principles; lease of telecommunication circuits	Mr. L. Burtz (France)
Study Group IV	Transmission maintenance of international lines, circuits and chains of circuits	Mr. J. Kiil (Denmark)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. H. Riedel (F.R. of Germany)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. J.R. Walters (United Kingdom)
Study Group VII	New networks for data transmission	Mr. V.C. MacDonald (Canada)
Study Group VIII	Telegraph and data terminal equipment, local connecting lines	Mr. G. Baggenstos (Switzerland)
Study Group IX	Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels	Mr. R. Brown (Australia)
Study Group X	Telegraph switching	Mr. Ch. Jansen (Netherlands)
Study Group XI	Telephone switching and signalling	Mr. J.S. Ryan (United States)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. F.T. Andrews (United States)
Study Group XIII	Automatic and semi-automatic telephone networks	Mr. S. Kuhn (Poland)
Study Group XIV	Facsimile telegraph transmission and equipment	Mr. M. Stephenson (United Kingdom)
Study Group XV	Transmission systems	Mr. F. Job (France)
Study Group XVI	Telephone circuits	Mr. S. Munday (United Kingdom)
Study Group Special A	Data transmission	Mr. V.N. Vaughan (United States)
Study Group Special C	Noise (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. H. Wirz (F.R. of Germany)
Study Group Special D	Pulse code modulation	Mr. Th. Irmer (F.R. of Germany)
CMTT	Television transmission (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. Y. Angel (France)
CMV	Definitions and symbols (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. R. Villeneuve

Plan Committees (CCITT/CCIR Joint Committees administered by CCITT)

World Plan Committee	World-wide telecommunication plan	Mr. A. Bigi (Italy)
Plan Committee for Africa	Telecommunication plan for Africa	Mr. L. Dia (Senegal)
Plan Committee for Latin America	Telecommunication plan for Latin America	Mr. C. Nuñez-A. (Mexico)
Plan Committee for Asia and Oceania	Telecommunication plan for Asia and Oceania	Mr. A. Zaidan (Saudi Arabia)
Plan Committee for Europe and the Mediterranean	Basin Telecommunication plan for Europe and the Mediterranean Basin	Mr. M. Toutan (France)

Special Autonomous Groups

GAS 3	Economic and technical comparison of transmission systems	Mr. M. Aoud (Morocco)
GAS 5	Economic conditions and telecommunication development	Mr. H. Longequeue (France)

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Period 1977 - 1980

Study Group	Name	Chairman
Study Group I	Telegraph operation and quality of service	Mr. K. Freiburghaus (Switzerland)
Study Group II	Telephone operation and quality of service	Mr. J. Biot (Belgium)
Study Group III	General tariff principles	Mr. M. Kojima (Japan)
Study Group IV	Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic telephone networks	Mr. J. Kiil (Denmark)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. G. Gratta (Italy)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. J. Pritchett (United Kingdom)
Study Group VII	New networks for data transmission	Mr. V.C. MacDonald (Canada)
Study Group VIII	Telegraph and data terminal equipment, local connecting lines	Mr. W. Staudinger (Germany, Fed. Rep. of)
Study Group IX	Telegraph transmission quality; specification of channel equipment and rules for the maintenance of telegraph channels	Mr. R. Brown (Australia)
Study Group X	Telegraph switching	Mr. E.E. Daniels (United Kingdom)
Study Group XI	Telephone switching and signalling	Mr. J.S. Ryan (United States)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. F.T. Andrews (United States)
Study Group XIV	Facsimile telegraph transmission and equipment	Mr. M. Blanc (France)
Study Group XV	Transmission systems	Mr. D. Gagliardi (Italy)
Study Group XVI	Telephone circuits	Mr. S. Munday (United Kingdom)
Study Group XVII	Data transmission	Mr. V.N. Vaughan (United States)
Study Group XVIII	Digital networks	Mr. Th. Irmer (Germany, Fed. Rep. of)
CMBD	Circuit noise and availability (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. A.P. Bolle (Netherlands)
CMTT	Television transmission (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. Y. Angel (France)
CMV	Definitions and symbols (Joint CCITT/CCIR Study Group administered by CCITT)	Mr. R. Villeneuve (France)

Plan Committees

World Plan Committee	World-wide telecommunication plan	Mr. M. Ghazal (Lebanon)
Plan Committee for Africa	Telecommunication plan for Africa	Mr. L. Dia (Senegal)
Plan Committee for Latin America	Telecommunication plan for Latin America	Mr. C. Nuñez-A. (Mexico)
Plan Committee for Asia and Oceania	Telecommunication plan for Asia and Oceania	Mr. A. Zaidan (Saudi Arabia)
Plan Committee for Europe and the Mediterranean Basin	Telecommunication plan for Europe and the Mediterranean Basin	Mr. L. Terol Miller (Spain)

Special Autonomous Groups

GAS 3	Economic and technical aspects of the choice of transmission systems	Mr. G. Wallenstein (United States)
GAS 5	Economic conditions and telecommunication development	Mr. H. Longequeue (France)
GAS 6	Economic and technical aspects of the choice of switching systems	Mr. L. Ackzell (Sweden)

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Period 1981 - 1984

Study Group	Name	Chairman
Study Group I	Definition and operational aspects of telegraph and telematic services (facsimile, Teletex, Videotex, etc.)	Mr. K. Freiburghaus (Switzerland)
Study Group II	Telephone operation and quality of service	Mr. J. Biot (Belgium)
Study Group III	General tariff principles	Mr. M. Kojima (Japan)
Study Group IV	Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic networks	Mr. J. Kiil (Denmark)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. G. Gratta (Italy)
Study Group VI	Protection and specifications of cable sheaths and poles	Mr. K. Nikolski (USSR)
Study Group VII	Data Communication networks	Mr. V.C. MacDonald (Canada)
Study Group VIII	Terminal equipment for telematic services (facsimile, Teletex, Videotex, etc.)	Mr. W. Staudinger (Germany, Fed. Rep. of)
Study Group IX	Telegraph networks and terminal equipment	Mr. E.E. Daniels (United Kingdom)
Study Group XI	Telephone switching and signalling	Mr. J.S. Ryan (United States)
Study Group XII	Telephone transmission performance and local telephone networks	Mr. P. Lorand (France)
Study Group XV	Transmission systems	Mr. D. Gagliardi (Italy)
Study Group XVI	Telephone circuits	Mr. S. Munday (United Kingdom)
Study Group XVII	Data communication over the telephone network	Mr. V.N. Vaughan (United States)
Study Group XVIII	Digital networks	Mr. Th. Irmer (Germany, Fed. Rep. of)
CMBD	Circuit noise and availability (Joint CCITT/CCIR Study Group)	Mr. A.P. Bolle (Netherlands)
CMTT	Television and sound transmission (Joint CCIR/CCITT Study Group)	Mr. Y. Angel (France)
CMV	Definitions and symbols (Joint CCIR/CCITT Study Group)	Mr. M. Thué (France)

Plan Committees (CCITT/CCIR Joint Committees administered by CCITT)

World Plan Committee	General Plan for the development of the World Telecommunication Network	Mr. M. Ghazal (Lebanon)
Plan Committee for Africa	General Plan for the development of the Regional Telecommunication Network in Africa	Mr. L. Dia (Senegal)
Plan Committee for Latin America	General Plan for the development of the Regional Telecommunication Network in Latin America	Mr. R.J.P. Severini (Argentina)
Plan Committee for Asia and Oceania	General Plan for the development of the Regional Telecommunication Network in Asia and Oceania	Mr. A.M. Al-Sabej (Kuwait)
Plan Committee for Europe and the Mediterranean Basin	Telecommunication plan for Europe and the Mediterranean Basin	Mr. L. Terol Miller (Spain)

Special Autonomous Groups

GAS 3	Economic and technical aspects of the choice of transmission systems	Mr. J.Z. Jacoby (United States)
GAS 4	Primary sources of energy	Mr. H. Krakowski (Germany, Fed. Rep. of)
GAS 5	Economic and social problems relating to telecommunication development	Mr. M. Benedetti (Italy)
GAS 7	Rural telecommunications	Mr. C. Rudilosso (Italy)
GAS 8	Economic and technical impact of implementing a regional satellite network	Mr. G. Malleus (France)
GAS 9	Economic and technical aspects of transition from an analogue to a digital telecommunication network	Mr. L. Ackzell (Sweden)

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Period 1985 - 1988

Study Group	Name	Chairman
Study Group I	Definition, operation and quality of service aspects of telegraph, data transmission and telematic services (facsimile, Teletex, Videotex, etc.)	Mr. M. Israel (Canada)
Study Group II	Operation of telephone network and ISDN	Mr. G. Gosztony (Hungary)
Study Group III	General tariff principles including accounting	Mr. B. Rouxeville (France)
Study Group IV	Transmission maintenance of international lines, circuits and chains of circuits; maintenance of automatic and semi-automatic networks	Mr. H.L. Marchese (United States)
Study Group V	Protection against dangers and disturbances of electromagnetic origin	Mr. G. Gratta (Italy)
Study Group VI	Outside plant	Mr. K. Nikolski (USSR)
Study Group VII	Data Communication networks	Mr. J.O. Wedlake (United Kingdom)
Study Group VIII	Terminal equipment for telematic services (facsimile, Teletex, Videotex, etc.)	Mr. W. Staudinger (Germany, Fed. Rep. of)
Study Group IX	Telegraph networks and terminal equipment	Mr. M. Matsubara (Japan)
Study Group X	Languages and methods for telecommunications applications	Mr. C. Carelli (Italy)
Study Group XI	ISDN and telephone network switching and signalling	Mr. J.S. Ryan (United States)
Study Group XII	Transmission performance of telephone networks and terminals	Mr. P. Lorand (France)
Study Group XV	Transmission systems	Mr. A.M. Nouri (Saudi Arabia)
Study Group XVII	Data transmission over the telephone network	Mr. K. Kern (Germany, Fed. Rep of)
Study Group XVIII	Digital networks including ISDN	Mr. H.K. Pfyffer (Switzerland)
Special Study Group “S”	CCITT Study Groups structure	Mr. W.G. Simpson (United Kingdom)
PC/WATTC-88	Preparatory Committee WATTC-88	Mr. F. Molina Negro (Spain)
CMTT	Television and sound transmission (Joint CCIR/CCITT Study Group)	Mr. Y. Angel (France)
CMV	Definitions and symbols (Joint CCIR/CCITT Study Group)	Mr. M. Thué (France)

Plan Committees (CCITT/CCIR Joint Committees administered by CCITT)

World Plan Committee	General Plan for the development of the International Telecommunication Network	Mr. C. Crump (United States)
Plan Committee for Africa	General Plan for the development of the Regional Telecommunication Network in Africa	Mr. E. Kamdem Kamga (Cameroon)
Plan Committee for Latin America	General Plan for the development of the Regional Telecommunication Network in Latin America	Mr. C. Romero Sanjines (Peru)
Plan Committee for Asia and Oceania	General Plan for the development of the Regional Telecommunication Network in Asia and Oceania	Mr. A.M. Al-Sabej (Kuwait)
Plan Committee for Europe and the Mediterranean Basin	General Plan for the development of the Regional Telecommunication Network in Europe and the Mediterranean Basin	Mr. L. Terol Miller (Spain)

Special Autonomous Groups

GAS 3	Economic and technical aspects of the choice of transmission systems	Mr. J.Z. Jacoby (United States)
GAS 7	Rural telecommunications	Mr. C. Rudilosso (Italy)
GAS 9	Economic and technical aspects of transition from an analogue to a digital telecommunication network	Mr. M. Ghazal (Lebanon)
GAS 10	Planning data and forecasting methods	Mr. A. Zolfaghari (Isl. Rep. of Iran)
GAS 11	Strategy for public data networks	Mr. J.B. Pécresse (France)

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Period 1989 - 1992

Study Group	Name	Chairman
Study Group I	Services	Mr. M. Israel (Canada)
Study Group II	Network operation	Mr. G. Gosztony (Hungary)
Study Group III	Tariff and accounting principles	Mr. B. Rouxeville (France)
Study Group IV	Maintenance	Mr. J. Shrimpton (United States)
Study Group V	Protection against electromagnetic effects	Mr. H. Lorke (German Democratic Rep.)
Study Group VI	Outside plant	Mr. K. Nikolski (USSR)
Study Group VII	Data Communication networks	Mr. J.O. Wedlake (United Kingdom)
Study Group VIII	Terminals for telematic services	Mr. W. Staudinger (Germany, Fed. Rep. of)
Study Group IX	Telegraph networks and telegraph terminal equipment	Mr. M. Matsubara (Japan)
Study Group X	Languages for telecommunication applications	Mr. C. Carelli (Italy)
Study Group XI	Switching and signalling	Mr. J.S. Ryan (United States)
Study Group XII	Transmission performance of telephone networks and terminals	Mr. P. Lorand (France)
Study Group XV	Transmission systems and equipments	Mr. A.M. Nouri (Saudi Arabia)
Study Group XVII	Data transmission over the telephone network	Mr. K. Kern (Germany, Fed. Rep. of)
Study Group XVIII	ISDN	Mr. H.K. Pfyffer (Switzerland)
CMTT	Television and sound transmission (Joint CCIR/CCITT Study Group)	Mr. W.G. Simpson (United Kingdom)

Plan Committees (CCITT/CCIR Joint Committees administered by CCITT)

World Plan Committee	General Plan for the development of the International Telecommunication Network	Mr. C. Crump (United States) Mr. L. Terol Miller (Spain) Chairman designate
Plan Committee for Africa	General Plan for the development of the Regional Telecommunication Network in Africa	Mr. E. Kamdem Kamga (Cameroon)
Plan Committee for Latin America	General Plan for the development of the Regional Telecommunication Network in Latin America	Mr. A.F. Garcia (Argentina)
Plan Committee for Asia and Oceania	General Plan for the development of the Regional Telecommunication Network in Asia and Oceania	Mr. J.L. Parapak (Indonesia)
Plan Committee for Europe and the Mediterranean Basin	General Plan for the development of the Regional Telecommunication Network in Europe and the Mediterranean Basin	Mr. L. Terol Miller (Spain)

Special Autonomous Groups

GAS 7	Rural telecommunications	Mr. C. Rudilosso (Italy)
GAS 9	Economic and technical aspects of transition from an analogue to a digital network	Mr. M. Ghazal (Lebanon)
GAS 12	Strategy for the introduction of new non-voice telecommunication services	Mr. J.B. Pécresse (France)

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Period 1993 - 1996

Study Group	Name	Chairman
Study Group 1	Service definition	Mr. M. Israel (Canada)
Study Group 2	Network operation	Mr. G. Gosztony (Hungary)
Study Group 3	Tariff and accounting principles	Mr. B. Rouxeville (France)
Study Group 4	Network maintenance	Mr. J. Shrimpton (United States)
Study Group 5	Protection against electromagnetic environment effects	Mr. G. Meineri (Italy)
Study Group 6	Outside plant	Mr. K. Nikolski (Russian Federation)
Study Group 7	Data networks and open system communications	Mr. H. Bertine (United States)
Study Group 8	Study Group 8 Terminals for telematic services	Mr. W. Staudinger (Germany, Fed. Rep. of)
Study Group 9	Television and sound transmission (former CMTT)	Mr. J.L. Tejerina (Spain)
Study Group 10	Languages for telecommunication applications	Mr. O.F. Faergemand (Denmark)
Study Group 11	Switching and signalling	Mr. S. Kano (Japan)
Study Group 12	End-to-end transmission performance of networks and terminals	Mr. P. Lorand (France)
Study Group 13	General network aspects	Mr. B.W. Moore (United Kingdom)
Study Group 14	Modems and transmission techniques for data, telegraph and telematic services	Mr. K. Kern (Germany)
Study Group 15	Transmission systems and equipments	Mr. P.A. Probst (Switzerland)
TSAG	Telecommunication Standardization Advisory Group	Mr. B. Horton (Australia)

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Period 1997 - 2000

Study Group	Name	Chairman
Study Group 2	Network and service operation	Mr. G. Gosztony (Hungary)
Study Group 3	Tariff and accounting principles including related telecommunications economic and policy issues	Mr. T. Matsudaira (Japan)
Study Group 4	TMN and network maintenance	Mr. D. Sidor (United States)
Study Group 5	Protection against electromagnetic environment effects	Mr. G. Meineri (Italy)
Study Group 6	Outside plant	Mr. Molleda (1997-1999) (Spain) Mr. J. R. Osterfield (2000) (United Kingdom)
Study Group 7	Data networks and open system communications	Mr. H. Bertine (United States)
Study Group 8	Characteristics of telematic systems	Mr. W. Staudinger (Germany)
Study Group 9	Television and sound transmission	Mr. J.L. Tejerina (Spain)
Study Group 10	Languages and general software aspects for telecommunication systems	Mr. A. Sarma (Germany)
Study Group 11	Signalling requirements and protocols	Mr. S. Kano (Japan)
Study Group 12	End-to-end transmission performance of networks and terminals	Mr. M. Cao (1997-1999) (China) Mr. C.A Dvorak (2000) (United States)
Study Group 13	General network aspects	Mr. B.W. Moore (United Kingdom)
Study Group 15	Transport networks, systems and equipment	Mr. P. Wery (Canada)
Study Group 16	Multimedia services and systems	Mr. P.A. Probst (Switzerland)
TSAG	Telecommunication Standardization Advisory Group	Mr. G. Fishman (United States)

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Period 2001 - 2004

Study Group	Name	Chairman
Study Group 2	Operational aspects of service provision, networks and performance	Mr. R. Blane (2001-2002) (United Kingdom) Mr. Ph. Distler (2003-2004) (France)
Study Group 3	Tariff and accounting principles including related telecommunication economic and policy issues	Mr. R. Thwaites (Australia)
Study Group 4	Telecommunication management, including TMN	Mr. D.J. Sidor (United States)
Study Group 5	Protection against electromagnetic environment effects	Mr. R. Pomponi (Italy)
Study Group 6	Outside plant	Mr. F. Montalti (Italy)
Study Group 7 (until 16/9/2001)	Data networks and open system communications	Mr. H. Bertine (United States)
Study Group 8	Characteristics of telematic systems	Mr. W. Staudinger (Germany)
Study Group 9	Integrated broadband cable networks and television and sound transmission	Mr. R. Green (United States)
Study Group 10 (until 16/9/2001)	Languages and general software aspects for telecommunication systems	Mr. A. Sarma (Germany)
Study Group 11	Signalling requirements and protocols	Mr. Y. Hiramatsu (Japan)
Study Group 12	End-to-end transmission performance of networks and terminals	Mr. J-Y. Monfort (France)
Study Group 13	Multi-protocol and IP-based networks and their internetworking	Mr. B.W. Moore (United Kingdom)
Study Group 15	Optical and other transport networks	Mr. P. Wery (Canada)
Study Group 16	Multimedia services, systems and terminals	Mr. P.-A. Probst (Switzerland)
Study Group 17 (as from 17/9/2001)	Data networks and telecommunication software (Merger of Study Group 7 and Study Group 10)	Co-Chairmen: Mr. H. Bertine (United States) Mr. A. Samra (Germany)
Special Study Group	IMT-2000 and beyond	Mr. J. Visser (Canada)
TSAG	Telecommunication Standardization Advisory Group	Mr. G. Fishman (United States)

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Period 2005 - 2008

Study Group	Name	Chairman
Study Group 2	Operational aspects of service provision, networks and performance	Ms. Marie-Thérèse Alajouanine (France)
Study Group 3	Tariff and accounting principles including related telecommunication economic and policy issues	Mr. K.S. Park (Korea, Rep. of)
Study Group 4	Telecommunication management	Mr. D. Sidor (United States)
Study Group 5	Protection against electromagnetic environment effects	Mr. R. Pomponi (Italy)
Study Group 6	Outside plant and related indoor installations	Mr. F. Montalti (Italy)
Study Group 9	Integrated broadband cable networks and television and sound transmission	Mr. R. Green (United States)
Study Group 11	Signalling requirements and protocols	Mr. Y. Hiramatsu (Japan)
Study Group 12	Performance and quality of service	Mr. J-Y. Monfort (France)
Study Group 13	Next generation networks	Mr. B.W. Moore (United Kingdom)
Study Group 15	Optical and other transport network infrastructures	Mr. Y. Maeda (Japan)
Study Group 16	Multimedia terminals, systems and applications	Mr. P.-A. Probst (Switzerland)
Study Group 17	Security, languages and telecommunication software	Mr. H. Bertine (United States)
Study Group 19	Mobile telecommunication networks	Mr. J. Visser (Canada)
TSAG	Telecommunication Standardization Advisory Group	Mr. G. Fishman (United States)

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Period 2009 - 2012

Study Group	Name	Chairman
Study Group 2	Operational aspects of service provision and telecommunication management	Ms. Marie-Thérèse Alajouanine (France)
Study Group 3	Tariff and accounting principles including related telecommunication economic and policy issues	Mr. Ki-Shik Park (Korea, Rep. of)
Study Group 5	Protection against electromagnetic environment effects	Mr. Ahmed Zeddam (France)
Study Group 9	Television and sound transmission and integrated broadband cable networks	Mr. Charles Sandbank (2009)(United Kingdom) Mr. Arthur Webster (2009-2012) (United States)
Study Group 11	Signalling requirements, protocols and test specifications	Mr. Wei Feng (China)
Study Group 12	Performance, QoS and QoE	Mr. Charles A. Dvorak (United States)
Study Group 13	Future networks including mobile and NGN	Mr. Chae-Sub Lee (Korea, Rep. of)
Study Group 15	Optical transport networks and access network infrastructures	Mr. Yoichi Maeda (Japan)
Study Group 16	Multimedia coding, systems and applications	Mr. Yushi Naito (Japan)
Study Group 17	Security	Mr. Arkadiy Kremer (Russian Federation)
TSAG	Telecommunication Standardization Advisory Group	Mr. John Visser (2009) (Canada) Mr. Bruce Gracie (2010-2012)(Canada)
SG3RG-AFR	Study Group 3 – Regional Group for Africa	Mr. Abossé Akue-Kpakpo (Togo) Mr. Modibo Traore (Mali)
SG3RG-AO	Study Group 3 – Regional Group for Asia and Oceania	Mr. Byoung Nam Lee (Korea, Rep. of)
SG3RG-LAC	Study Group 3 – Regional Group for Latin America	Mr. Facundo Fernández Begni (Argentina)
SCV	Standardization Committee for Vocabulary	Mr. Nabil Kisrawi (2009-2011)(Syrian Arab Republic) Ms. Marie-Thérèse Alajouanine (2011-2012) (France)

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Period 2013 - 2016

Study Group	Name	Chairman
Study Group 2	Operational aspects of service provision and telecommunication management	Ms. Sherif Guinena (Egypt)
Study Group 3	Tariff and accounting principles including related telecommunication economic and policy issues	Mr. Seiichi Tsugawa (Japan)
Study Group 5	Environment and climate change	Mr. Ahmed Zeddam (France)
Study Group 9	Broadband cable and TV	Mr. Arthur Webster (United States)
Study Group 11	Signalling requirements, protocols and test specifications	Mr. Wei Feng (China)
Study Group 12	Performance, QoS and QoE	Mr. Kwame Baah-Acheamfuor (Ghana)
Study Group 13	Future networks including cloud computing, mobile and next-generation networks	Mr. Chae-Sub Lee (Korea, Rep. of)
Study Group 15	Networks, Technologies and Infrastructures for Transport, Access and Home	Mr. Steve Trowbridge (United States)
Study Group 16	Multimedia coding, systems and applications	Mr. Yushi Naito (Japan)
Study Group 17	Security	Mr. Arkadiy Kremer (Russian Federation)
Study Group 20	Internet of Things (IoT) and its applications including smart cities and communities (SC&C) [established by TSAG in June 2015]	Nasser Al Marzouqi (United Arab Emirates)
TSAG	Telecommunication Standardization Advisory Group	Mr. Bruce Gracie (Canada)
SG3RG-AFR	Study Group 3 – Regional Group for Africa	Mr. Abossé Akue-Kpakpo (Togo) Mr. Saliou Toure (Senegal)
SG3RG-AO	Study Group 3 – Regional Group for Asia and Oceania	Mr. Byoung Nam Lee (Korea, Rep. of)
SG3RG-LAC	Study Group 3 – Regional Group for Latin America	Mr. Tito Lopez (Paraguay)
SCV	Standardization Committee for Vocabulary	Mr. Imad Hoballah (Lebanon)
Review Committee	Review Committee	Mr. Yoichi Maeda (Japan)

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Period 2017 - 2020

Study Group	Name	Chairman
Study Group 2	Operational aspects of service provision and telecommunications management	Phil Rushton (United Kingdom)
Study Group 3	Tariff and accounting principles including related telecommunication economic and policy issues	Seiichi Tsugawa (Japan)
Study Group 5	Environment and climate change	Maria Victoria Sukenik (Argentina)
Study Group 9	Broadband cable and TV	Satoshi Miyaji (Japan)
Study Group 11	Signalling requirements, protocols and test specifications	Andrey Kucheryavy (Russian Federation)
Study Group 12	Performance, QoS and QoE	Kwame Baah-Acheamfuor (Ghana)
Study Group 13	Future networks including cloud computing, mobile and next-generation networks	Leo Lehmann (Switzerland)
Study Group 15	Networks, Technologies and Infrastructures for Transport, Access and Home	Steve Trowbridge (United States)
Study Group 16	Multimedia coding, systems and applications	Zhong Luo (China)
Study Group 17	Security	Heung Youl Youm (Korea, Rep. of)
Study Group 20	Internet of Things (IoT) and its applications including smart cities and communities (SC&C)	Nasser Al Marzouqi (United Arab Emirates)
TSAG	Telecommunication Standardization Advisory Group	Bruce Gracie (Canada)
SCV	Standardization Committee for Vocabulary	Tong Wu (China)

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Connecting the world and beyond

CCITT and ITU-T Study Groups (1956 - present)

History of ITU Portal

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