1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 % TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU4%,%0(/.%G0G0.%47/2+G0G0!.$G0G0)3$.15!,)49G0G0/&G0G03%26)#% G0G0.%47/2+G0G0-!.!%-%.4!.$G0G042!&)#G0G0%.).%2).34!4)34)#3G0G0&/2G0G04(%G0G0).4%2.!4)/.!,4%,%0(/.%G0G03%26)#%G0G0 G0.5-“%2G0G0/&#)2#5)43G0G0).G0G0/
2、0%2!4)/.G0G0!.$G0G06/,5-%/&G0G042!&)#G0G9)45G134G0G0RecommendationG0G0% (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation E.401 was published in Fascicle II.3 of the Blue Book. This file is an extract from theBlue Book. While the presentation and layout of the text might be slightly different
3、 from the Blue Book version, thecontents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below).2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both atelecommunication administration and a recognized oper
4、ating agency. ITU 1988, 1993All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the ITU.Fascicle II.3 Rec. E.401 1Recommendation E.401STATISTICS F
5、OR THE INTERNATIONAL TELEPHONE SERVICE(NUMBER OF CIRCUITS IN OPERATION AND VOLUME OF TRAFFIC)(Statistics exchanged by Administrations)Administrations exchange each year, in February, statistics showing the number of circuits used and thevolume of traffic monitored in the preceding year, as well as e
6、stimates of the number of circuits which will be requiredthree years and five years later. These statistics shall be drawn up in the form indicated below.A copy of the statistics shall be sent to the CCITT Secretariat for information.ANNEX A(to Recommendation E.401)How to fill in the table on intern
7、ational telephone traffic statisticsColumn 1 Designation of the connection by giving the name of the outgoing exchange first and then thename of the incoming exchange. Two-way connections will be shown in alphabetical order.Columns 2 and 3 Number of circuits in operation as on 31 December of the yea
8、r of the statistics.The number will be shown in column 2 when it refers to outgoing circuits and in column 3when it refers to both-way circuits.Columns 4 and 5 Number of circuits which would have been required during the year of the statistics.Column 6 Method of operation.The following abbreviations
9、 will be used:A for automatic,SA for semiautomatic,M for manual,A + SA for automatic and semiautomatic.Column 7 Destination of traffic.Each relation will be shown in this column on a separate line.In the example given, the traffic routed over the Zrich-Kbenhavn circuits is destined forDenmark (termi
10、nal), Sweden, Norway and Finland (transit). In this case, the data for eachdestination will be shown in columns, 8, 9, 10 and 11. The total traffic figure, however, shouldnot be omitted. These data will be bracketed together. If the connection handles traffic only tothe country in which the incoming
11、 exchange is situated, only the word “terminal” will appear incolumn 7.Columns 8 and 9 Busy-hour traffic, expressed in erlangs. (See Recommendation E.600.)The traffic measured during the busiest month of the year of the statistics is given in column 9.For two-way circuit groups the total amount of i
12、ncoming and outgoing traffic should be given.In column 8 the month of the year during which the traffic was measured should be indicated inroman numerals.2 Fascicle II.3 Rec. E.401Column 10 Busy hour (UTC).This refers to the busy hour as defined in Recommendation E.600.Column 11 Annual increase, in
13、%. Each Administration should insert in this column the annual trafficincrease rate with respect to the previous year.Columns 12 and 13 Columns 12 and 13 should show the estimated number of circuits required to route traffic inthree and five years time, respectively. For example, if the statistics r
14、elating to 1982 are drawnup in February 1983, column 12 will give the estimated number of circuits required in 1986 andcolumn 13 those required in 1988.International telephone traffic statisticsYear: .Number ofcircuits inserviceNumber ofcircuitrequiredMethod of DestinationBusy-hourtrafficStart ofbus
15、y-hourAnnualtrafficEstimatednumber ofcircuitObservationsCircuitOut-goingBoth-wayOut-goingBoth-wayoperation of trafficMonth Erlangshour(UTC)increaseInthreeyearsInfiveyears123456 7 8910 1121314(Examples)Zrich-Kbenhavn24 20 SATerminalSwedena)NorwayFinlandTotalXXXXX84211510.0010.1509.4510.3010.0015%12%13%7%14% 28 32a)Overflowtraffic onZrich-StockholmconnectionZrich-Stockholm12 11 SA Terminal IX 5.5 10.15 12% 13 15
