ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements

pdf标准 ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements

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ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements  第 1 页 ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements  第 2 页 ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements  第 3 页 ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements  第 4 页 ITU-T E.427-1988 特殊服务质量监视数据,即国际自动业务用户困难测量数据的收集和统计分析 Collection and statistical analysis of special quality of service observation data for measurements  第 5 页
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国外分类,ITU,ITU-T(电信标准分局),itu,特殊,服务,质量,服务质量,监视,数据,国际,自动,业务,用户,困难,测量,数据,收集,统计,分析,统计分析,collection,and,statistical,analysis,of,special,quality,of,service,observation,data,for,measurements

INTERNATIONAL TELECOMMUNICATION UNION )45 4 % TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 4%,%0(/.% .%47/2+ !.$ )3$. 15!,)49 /& 3%26)#% .%47/2+ -!.!'%-%.4 !.$ 42!&&)# %.').%%2).' #/,,%#4)/. !.$ 34!4)34)#!, !.!,93)3 /& 30%#)!, 15!,)49 /& 3%26)#% /"3%26!4)/. $!4! &/2 -%!352%-%.43 /& #534/-%2 $)&&)#5,4)%3 ). 4(% ).4%2.!4)/.!, !54/-!4)# 3%26)#% )45 4 Recommendation % (Extract from the "LUE "OOK) NOTES 1 ITU-T Recommendation E.427 was published in Fascicle II.3 of the Blue Book. This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents 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 a telecommunication administration and a recognized operating agency. © ITU 1988, 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Recommendation E.427 Fascicle II.3 - Rec. E.427 COLLECTION AND STATISTICAL ANALYSIS OF SPECIAL QUALITY OF SERVICE OBSERVATION DATA FOR MEASUREMENTS OF CUSTOMER DIFFICULTIES IN THE INTERNATIONAL AUTOMATIC SERVICE This Recommendation is provided to permit the orderly collection of data required for special studies to identify sources of difficulty in customer use of the international automatic telephone service. When calls are made to points outside a customer’s home country, many different sets of ringing and busy tones are encountered. In order to measure the effect of unusual sounding ringing tones and busy tones on customer behaviour, it has been decided to collect data on how long customers listen to such foreign tones as well as to their national tones in order to compare them. The data are to be collected in the same manner as those required for the completion of Table 1/E.422. These data are an extension of those collected for Table 1/E.422, and, as an aid to subsequent analysis, a copy of the current version of that table should be used with the table of this Recommendation. Table 1/E.427 contains questions numbered 1-9. Their relationship to the questions of Table 1/E.422 is shown in parentheses. A preferred set of analyses for identifying the statistical significance of differences between data collected from subscribers when setting up national calls and the corresponding data collected from subscribers when setting up international calls is given below. 1 Determine the percentage change in any measure by use of the formula: f f  Change (Ci ) =  ij − iH  ×100    N j NH  j = A, B, C i = 0-2, 2-5 ..., > 30 where ƒij is the observed frequency of calls of category i in the country j, Nj is the total number of observations in the country j sample, ƒiH is the observed frequency of calls of category i in the home country H, and NH is the total number of observations in the home country sample. 2 Compare the central location of the distributions by use of the Kruskal-Wallis One-Way Analysis of Variance [1]. 3 Compare the "forms" or "shapes" of the distribution by means of the chi-square test [2]. 4 Compare changes in single valued variables, e.g. percentage incomplete-trunk-code, by use the chi-square test. Fascicle II.3 - Rec. E.427 1 TABLE 1/E.427 (Supplement to Table 1/E.422) Observations of international outgoing telephone calls for quality of service Additional details regarding subscriber dialled calls Outgoing international exchange: .................................................................................................................................. Group of circuits:................................................................................................................................................................ Period from: ................................................................................................... to ............................................................... Category Number Subtotal Details of dialled calls 1. 3. Total Calls abandoned prematurely before receipt of a tone or announcement .................................................................................... e) Interval from end of dialling to disconnect : 0- 5 s .............................................................................................. 5- 10 s ............................................................................................... 10-20 s ............................................................................................... 20-30 s ...........................................

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