1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 1 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU%.%2!,G0G02%#/-%.$!4)/.3G0G0/.G0G04%,%0(/.%37)4#().G0G0!.$G0G03).!,).).4%2.!4)/.!,G0G0!54/-!4)#G0G0!.$3%-)G13!54/-!4)#G0G07/2+).$%4%2-).!4)/.G0G0/ this information is necessary in theinternational service for
2、 the purposes of:- charging the calling subscriber 1;- measuring the call duration 2.2 Where subscribers in an outgoing country have direct access to an operators position (in a manual exchange,for instance) in a public exchange of an incoming country, arrangements should be made in the national net
3、work of theincoming country to ensure that - in the outgoing country - the calling subscriber is charged, and the call durationmeasured, only from the moment when the called subscriber replies. This means that an answer signal is not sent whenthe operator in a public exchange of the incoming country
4、 replies. These provisions are set out in detail for CCITTstandardized systems (see Recommendation Q.102).References1 CCITT Recommendation Chargeable duration of calls, Vol. II, Rec. E.230.2 CCITT Recommendation Basic technical problems concerning the measurement and recording of calldurations, Vol. II, Rec. E.260.
