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ITU-R
The ITU-R Recommendations constitute a set of
international technical standards developed by the Radiocomunication Sector
(formerly CCIR) of the ITU. They are the result of studies undertaken by
Radiocommunication Study Groups on:
the use of a vast range of wireless services, including popular new mobile
communication technologies:
the management of the radio-frequency spectrum and satellite orbits;
the efficient use of the radio-frequency spectrum by all radiocommunication
services;
terrestrial and satellite radiocommunication broadcasting;
radiowave propagation;
systems and networks for the fixed-satellite service, for the fixed service
and the mobile service;
space operation, Earth exploration-satellite, meteorological-satellite and
radio astronomy services.
The ITU-R Recommendations are approved by ITU Member States. Their
implementation is not mandatory; however, as they are developed by experts from
administrations, operators, the industry and other organizations dealing with
radiocommunication matters from all over the world, they enjoy a high reputation
and are implemented worldwide.
ITU-R Reports contain technical, operational or procedural statements prepared
by a Study Group on a given subject. |
ITU-T
The ITU Telecommunication Standardization Sector (ITU-T)
is one of the three Sectors of the International Telecommunication Union (ITU).
ITU-T was created on 1 March 1993 within the framework of the "new" ITU,
replacing the former International Telegraph and Telephone Consultative
Committee (CCITT) whose origins go back to 1865.
The ITU-T mission is to ensure an efficient and on-time production of
high quality standards (Recommendations) covering all fields of
telecommunications except radio aspects.
Standardization work is carried out by 13 Study Groups, in which
representatives of the ITU-T membership develop Recommendations for the various
fields of international telecommunications. The priority fields of study
include:
- IP interworking and related matters
- Network aspects of mobility
- Network access technologies (xDSL)
- Optical networking technologies
- Tariff and accounting issues
- Multimedia services and systems
ITU-T standardization activities are conducted in cooperation with many
other standards development organizations (SDOs). |
