1 Scope
2 Normative references
3 Abbreviations and definitions
3.1 Abbreviations
3.2 Definitions
4 Interpreting INMD measurements
4.1 Single call measurements
4.2 Multiple call measurements
4.3 Sample size
5 Impact of Class C INMD location in the network
5.1 Context
5.2 INMD location at the outgoing side of the international gateway
5.3 INMD location at the incoming side of the international gateway
5.4 Comparative impact of both scenarios on the measures recommended in
ITU-T
Rec. P.561
5.5 Discussion
5.6 Conclusion
6 Using INMD measurements to predict average customer opinion
6.1 Using a model to predict customer opinion
6.2 Assumptions
6.3 Model
6.4 Predictions
6.5 Diagnostics using an opinion model for INMDs of classes A, B or C
7 Using INMD measurements for network planning
8 Using INMD measurements to maintain networks
8.1 Objectives provided by Recommendations in the G series
8.2 Additional thresholding techniques used to direct maintenance
Annex A – Call Clarity Index model description
A.1 Introduction
A.2 Model equations
A.3 Model output
A.4 Weighting values
A.5 Assumptions/Data files
A.6 Miscellaneous equations
Annex B – Mapping INMD measurements to the E-model
B.1 Algorithms relating INMD measurements to E-model parameters
Appendix I – Details on the comparison of class C INMD
location within the network
Appendix II – Statistical techniques for use on
multiple INMD measurements
II.1 Confidence intervals
II.2 Hypothesis test for the mean of a set of measurements versus a fixed
value
II.3 Hypothesis test for the means of two sets of measurements
Appendix III – Statistical techniques for use on INMD
threshold calculations
III.1 Introduction
III.2 Theoretical approach
III.3
Approximation