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    ITU-T F 61-1993 OPERATIONAL PROVISIONS RELATING TO THE CHARGEABLE DURATION OF A TELEX CALL《关于用户电报呼叫计费时长的操作规定》.pdf

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    ITU-T F 61-1993 OPERATIONAL PROVISIONS RELATING TO THE CHARGEABLE DURATION OF A TELEX CALL《关于用户电报呼叫计费时长的操作规定》.pdf

    1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 orb) or by shorter periods, either derived by periodic pulse metering of the type used in national automaticservices or derived from an automatic recording of all details, which would normally include theidentification of the calling and called subscriber

    2、s, the time at which the call began, the called durationand/or the time at which the call terminated.1.6 The degree of accuracy of the call-duration measuring equipment should be 2% for a set of measurementscovering an adequate number of calls which, in light traffic relations, may lead to acceptanc

    3、e of the fact that 2%accuracy should be obtained on the overall measurements for a year but not for each of the partial measurements madeduring that year (monthly measurements, for example, if the monthly interval is retained for the establishment ofinternational accounts).2 Semi-automatic and manua

    4、l service2.1 The chargeable duration of a telex call begins at the moment the connection is established between the callingand the called subscribers.2.2 It ends at the moment when the clearing signal given by the calling or called subscriber is transmitted over theinternational circuit. To this end

    5、, the international telex position must be able to receive the clearing signal from bothsides.2.3 With manual or semi-automatic operation, the operator of the controlling international telex position shalldetermine the chargeable duration, unless other arrangements have been made by agreement betwee

    6、n theAdministrations concerned, taking into account, where necessary, any difficulties in transmission or any irregularitiesthat he may observe._1)See also Recommendation D.61.2 Fascicle II.4 - Rec. F.612.4 When a telex call is controlled by an operator at a telex position in a transit country, the

    7、chargeable duration ofthe call shall be notified to the international telex exchange of origin within 24 hours, giving the following details: the locality and number of the calling subscriber; the locality and number of the called subscriber; the time at which the call began; its chargeable duration in minutes.Example: STOCKHOLM 1846 TO ATHENS 21460 AT 1546Z 3 RPT 3 MNS


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