The CCITT(the International Telegraph and Telephone ConsultativeCommittee) is a permanent organ of the International Telecommunication Union O.CCITT is responsible for studying technical,operating and tariff questions and issuing Reqmmendations on them with a view to standardizing telecommunicatiOns on a worldwide basis.The Plenary Assemblyof CCITT which meets every four years, establishesthe topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of CCITT between Plenary Assembliesis coveredby the procedure hid down in CCITT ResolutionNo.2(Melbourne, 1988).