Committed to connecting the world
Areas of Action
Historical Highlights: ITU and Standardization
Search the History Portal
You are here
History of ITU Portal
History of ITU Portal
Explore the Digital Collections
Discover ITU's History
Focus on Areas of Work
Overview of ITU's History article
ITU Library and Archives
Page Content 10
Persistent Identifier for this page
Page Content 20 Title Hyperlink
The standardization work of ITU dates back to 1865, when representatives of twenty European States met in Paris to coordinate and set standards for the telegraph systems in Europe. Annexed to the
International Telegraph Convention
signed at this conference were the
International Service Regulations
(also known as the Telegraph Regulations) which provided details about operational issues. In order to keep up with advances in telegraphy, these Regulations were regularly revised and updated by subsequent conferences.
By 1885, the development and expansion of telephony required attention and so regulations for “the international telephone service” were added to the Telegraph Regulations.
By the early twentieth century, the complexity of international telephone service and long-distance telegraphy made it necessary to carry out international studies in the interval between Union conferences in order to develop relevant international standards. Two consultative committees were therefore created by the 1925 International Telegraph Conference in Paris:
International Telephone Consultative Committee (CCIF)
- to study and develop standards for terminal equipment, transmission quality and tariffs for long-distance telephony
International Telegraph Consultative Committee (CCIT)
– to deal with the technical and operational aspects of telegraphy, to standardize phototelegraphy and to establish tariffs and international terminology.
These Committees each established a structure with Study Groups carrying out research and developing proposed standards (called Recommendations) and regular Plenary Assemblies which approved the standards and organized the work of the Study Groups.
In view of the basic similarity of many of the technical problems faced by the CCIF and CCIT, a decision was taken in 1956 to merge the two committees into a single committee:
International Telegraph and Telephone Consultative Committee (CCITT)
- Its duties were to study technical, operating and tariff questions related to telegraphy and telephone and to issue recommendations on them.
In 1992, the Union's Additional Plenipotentiary Conference in Geneva undertook a reform of ITU to give the Union greater flexibility to adapt to an increasingly complex, interactive and competitive telecommunications environment. ITU's three main areas of activity were organized in "Sectors": telecommunication development, radiocommunication, and telecommunication standardization. The CCITT was renamed the Telecommunication Standardization Sector (ITU-T).
Telecommunication Standardization Sector (ITU-T)
- Its functions are to study technical, operating and tariff questions and adopt recommendations on them with a view to standardizing telecommunications on a worldwide basis.
The Telecommunication Standardization Bureau (TSB) is the secretariat for the Sector.
Page Content 2
Page Content 3
Page Content 4
Page Content 5
Page Content 17
Page Content 18
Page Content 19
Page Content 20
Page Content 11
Page Content 12
Page Content 13
Page Content 15
Complete List of Administrative Telegraph and Telephone Conferences
Complete List of CCIT, CCIF, CCITT, WTSA Assemblies
Past and Present Directors - CCIF, CCIT, CCITT and TSB
CCIF / CCIT / CCITT / ITU-T Study Groups (1924-present)
CCITT / ITU-T 50th Anniversary (2006)
CCITT / ITU-T 60th Anniversary (2016)
All editions of the Telegraph Regulations
All editions of the Telephone Regulations
All editions of the International Telecommunication Regulations (ITRs)
Telegraph and Telex Statistics (1849-1967)
Telephone Statistics (1885-1967)
Further Reading: Telegraph, Telephone and Standardization
Page Content 6
Page Content 7
Page Content 8
Page Content 14
ITU Telecommunication Standardization Sector
Page Content 16
All Rights Reserved
Back to top