The CCITT considering a) that signalling conditions in the international telex service require accurate definition of the signais to be used on international telex circuits in putting through, supervising, clearing, and charging for international telex calls. That these signais must be such as to take into account that there are some fairly important differences in makeup between the telex networks of different countries. In some countries, selection is done by dialling, in others by means of start-stop signais. Some networks use direct selection while others use register translators. Between some networks, subscriber automatic selection is used whilst, in relations with other networks, semi-automatic or manual selection is still being used.
ITU-T U.1 FRENCH-1993 Referenced Document
ITU-T F.1 Operational Provisions for the International Public Telegram Service - Series F: Non-Telephone Telecommunication Services - Telegraph Service - Operating Methods for the International Public Telegram Service Study Group 2; 65 pp*， 1998-03-01 Update
ITU-T F.60 Operational Provisions for the International Telex Service (Study Group I) 34 pp
ITU-T F.61 OPERATIONAL PROVISIONS RELATING TO THE CHARGEABLE DURATION OF A TELEX CALL
ITU-T F.69 THE INTERNATIONAL TELEX SERVICE - SERVICE AND OPERATIONAL PROVISIONS OF TELEX DESTINATION CODES AND TELEX NETWORK IDENTIFICATION CODES*， 1994-01-01 Update
ITU-T S.9 Switching Equipment of Start-Stop Apparatus - Telegraph Services Terminal Equipment (Study Group IX) 2 pp
ITU-T U.1 FRENCH-1993 history
1993ITU-T U.1 FRENCH-1993 Signalling Conditions to Be Applied in the International Telex Service