tworks and telegraph terminal 3. Development, combining the TCD and TDB. equipment Languages for telecommunications It also recommended that the ITU attract finance from industry for applications its work. The main proposals will need to be voted on at the 1994 ITU Plenipotentiary Conference, to be held in Kyoto, Japan, and Switching and signalling will be considered at an ad hoc meeting called for in Geneva in Transmission performance of telephone December 1992. The committee also recognised that the ITU's networks and terminals standards work must fit with that of Europe's ETSI, USA's T1 committee, and Japan's TTC. Transmission systems and equipment Data transmission over the telephone 22.3.2 The CCITT network XVIII The Comite Consultatif Internationale Telephonique et Telegra- phique was set up in 1925 as an agent of the ITU in order to carry out studies into the technical problems of telephony. Article 13 in the constitution of the ITU defines the role of the CCITT as being Table 22.2 CCITT Special Autonomous Groups to study technical, operating and tariff questions and to issue recom- mendations on these with a view to standardising telecommunica- tions on a world-wide basis. Radiocommunications are excluded as Group Activity these come within the responsibility of the CCIR. GAS 7 Rural telecommunications GAS 9 Economic and technical aspects of transition 22.3.2.1 CCITT organisation from an analogue to a digital network GAS 12 Strategy for the introduction of new non- Members of the CCITT consist of: voice telecommunication services in developing countries Telecommunication administrations of all members of the ITU. BT, Mercury and the DTI represent the UK. Any RPOA or SIO who wishes to participate in the work of the The Study Groups usually conduct their business by correspond- CCITT and is approved by its members to do SO. ence, meeting relatively infrequently, to produce draft standards for Membership fees to the ITU cover those of the CCITT, but ratification by the Plenary assembly. RPOAs and SIOs are ch