International Telegraph and Telephone Consultative Committee

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In1957,itreplacedtheTelegraphAdvisoryCommitteeandtheTelephoneAdvisoryCommitteeandestablishedtheInternationalTelecommunicationsConsultingOrganization,referredtoasCCITT,headquarteredinGeneva,Switzerland.TheresponsibilityoftheInternationalTelegraphandTelephoneConsultativeCommitteeistoconductresearchandmakerecommendationsonissuesrelatedtotelegraphandtelephonetechnology,services,andtariffs.TheInternationalTelegraphandTelephoneConsultativeCommitteeiscomposedofthecompetentauthoritiesofallmemberstatesoftheInternationalTelecommunicationUnionandtheaccreditedprivatesector.TheInternationalTelegraphandTelephoneConsultativeCommitteehas16studygroups.①Studygroup1:Telegraphoperationandservicequality;②Studygroup2:telephoneoperationandservicequality;③Studygroup3:generaltariffprinciples;④Studygroup4:maintenanceofinternationallines,circuitsandlinks;⑤StudyGroup5:Protectionagainstelectromagneticinterferenceandhazardouseffects;⑥StudyGroup6:Standardizationandprotectionofcablesheathsandpoles;⑦StudyGroup7:Newdatatransmissionnetwork;⑧Studygroup8:Informationprocessingandcommunication;⑨StudyGroup9:TelegraphNetworkandTerminalEquipment;⑩StudyGroup11;TelephoneExchangeandSignaling;StudyGroup12:TelephoneTransmissionQualityandLocalTelephoneNetwork;StudyGroup15:TransmissionSystem;StudyGroup16:TelephoneCircuits;StudyGroup17:DataTransmission;StudyGroup18:DigitalNetwork;CMBDGroup:CircuitNoiseandReliability(astudygroupjointlyestablishedwiththeInternationalRadioConsultativeCommittee).ThepublicationsoftheInternationalTelegraphandTelephoneConsultativeCommitteeincluderesearchreportsandrecommendationsofvariousresearchgroups.