џWPCL ћџ2BJ|xа АH аа АААш агга ХА6p&А6p&Х аеЅI а Hр аааУ Уб cмˆ4 PŽТ б Fascicle VII.2 Р-Р Rec. U.6 PAGE1 ЅееI а HH аааУ Уб cмˆ4 PŽТ бPAGE2 Fascicle VII.2 Р-Р Rec. U.6 еа HH ааЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџHpи P Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаа АшАX аУ Уб cмˆ4 PŽТ бRecommendation U.6 аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџH јP Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаСр8>Сб cмˆ4 PŽТ бPREVENTION OF б cмˆ4 PŽТ бFRAUDULENT TRANSIT TRAFFIC Ср89СIN THE FULLY AUTOMATIC INTERNATIONAL TELEX SERVICE аЬџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџHpи P Ј XА`ИhР!(#џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџЬаСр8=Сб cмˆ4 PŽТ бФ ФУУ(New Delhi, 1960; amended at Geneva, 1964)ФФ Та ТThe CCITT,ЦЦ УУconsidering а H аФФС С(a)СpСthat, with fully automatic working in the international telex service, the possibility of fraudulent routing by subscribers of international calls involving tandem connection of international telex trunks might arise whenever subscribers are given automatic access to international telex trunk circuits that have, at their incoming ends, automatically switched access to other international telex trunk circuits; а H аС С(b)СpСthat, by the adoption of a systematic plan, such traffic can be barred without involving either expensive or elaborate equipment arrangements; а H аС С(c)СpСthat, to be effective, such a plan would need to be adopted by all Administrations and recognized private operating agencies since failure to provide barring facilities on the traffic between two countries could open the way for irregular routings at the expense of a third country, УУunanimously declares the view а H аФФС С(1)СpСthat national telex systems shall be so arranged that the first digit of the selection signals transmitted over incoming international telex trunks will indicate whether an automatic transit call is concerned; С СУУNoteФФ Р-Р The use of a common first digit to indicate access to both international telex trunk circuits and manual switchboards leads to а H аcomplication in the barring arrangements and should therefore be avoided as far as possible. С С(2)СpСthat where an international telex trunk carrying fully automatic traffic also carries traffic requiring access at the incoming end to outlets selected by means of the digit characterizing an automatic transit call, the country of origin will bar irregular routings by discriminating on the digits transmitted by calling subscribers; С С(3)СpСthat where an international telex trunk carrying fully automatic traffic does not carry traffic requiring access at the incoming end by means of the digit characterizing an automatic transit call, the incoming equipment shall be so arranged that the corresponding outlets are not accessible and that when access is attempted theУУ number unobtainableФФ signal is returned; а H аС С(4)СpСthat it is not admitted that two Administrations can agree to omit the provision of barring facilities on traffic between their respective countries. However, where the incoming country has an existing network in which considerable difficulty would be experienced in barring in accordance with РSР 3 above, the responsibility for barring may, by agreement, be assumed by the country of origin in the manner specified in РSР 2.