ITU-T E 260-1993 Basic Technical Problems Concerning the Measurement and Recording of Call Durations《涉及呼叫时间测量和记录的基本技术问题》.pdf
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1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 % TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU4%,%0(/.%G0G0.%47/2+G0G0!.$G0G0)3$./0%2!4)/. G0G0.5-“%2). G0G02/54).!.$G0G0-/“),%G0G03%26)#%“!3)#G0G04%#(.)#!,G0G002/“,%-3#/.#%2.).G0G04(%G0G0-%!352%-%.4!.$G0G02%#/2$).G0G0/ the holding time for a given call
2、duration may thus be extremely variable1).2 Discrimination between automatic and semiautomatic callsSince different accounting procedures are used for automatic and semiautomatic calls, the recording apparatusmust be capable of distinguishing between these two types of calls and must record the call
3、 duration of automatic callsonly.Discrimination can be effected by one of the following methods:a) by connecting the measuring apparatus to a point in the exchange through which only automatic traffic isrouted;b) by recording call durations only for calls containing the discriminating digit 0 used i
4、n automatic working(see the Recommendation Q.104 cited in 2).Method b) may be particularly useful when both automatic and semiautomatic calls originate at exchangeswithin the national network and are routed to the outgoing international exchange over a common group of circuits.3 Omission of internat
5、ional transit traffic from the records of call durationAll records of call duration will be taken in the outgoing country and will relate to calls originating in thatcountry. It will therefore be necessary, in an international exchange which routes both terminal and international transittraffic, to
6、exclude the call duration of international transit calls passing through the exchange.It will be difficult to discriminate between originated calls and transit calls on the outgoing international circuitsand it may therefore be necessary to segregate this traffic within the exchange and connect the
7、recording apparatus at apoint in the exchange where transit traffic is not encountered._1)In Recommendation D.150, 4.1.4 1 holding time is not recommended because of the wide variations between chargeabletime and holding time in different relations and in different call types, which makes the use of
8、 holding time inappropriate forremunerating Administrations of countries of destination.2 Fascicle II.2 - Rec. E.2604 Discrimination according to destination4.1 The records of call durations obtained by the recording apparatus must be related to particular countries ofdestination and, if required, t
9、o the charging areas of the country of destination; the recording apparatus should thereforebe capable of identifying the destination of a call and of associating the measured call duration with this destination.Note For drawing up international accounts (apart from frontier relations) it is not nec
10、essary to know theorigin of the call or the charging zone from which it comes. The differences in shares resulting from different outgoingcharging zones in a given country are kept by that country.4.2 Incoming country constituting a single charging zoneWhere the recording apparatus is connected to a
11、 circuit group carrying only terminal traffic, no discriminationis required. Where, however, a circuit group carries traffic to more than one country, discrimination between thesecountries must be effected from an examination of the international code for the country and/or the type of seizingsignal
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