A recent Bell System customer loop survey was jointly conducted by AT&T and Bell Laboratories. Bell Labs developed the sampling plan and performed the data analysis while AT&T assumed responsibility for the sample selection, data collection, and all intermediate data processing prior to analysis. This paper presents the principal physical composition and calculated transmission statistical characterization of customer loop plant as defined by that survey. Comparisons of data obtained from this survey and a similar survey made in 1964 are also presented.
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L. M. Manhire (1978) studied this question.
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