Statistical Control of Trunk Transmission Quality Utilizing Computer Techniques

This paper discusses the means whereby the distribution grade and bias ratings of trunk circuits can be determined by trunk group, central office, division, area, and finally the entire company through use of a digital computer. The original data can be acquired manually or by means of an automatic trunk routiner which provides readout. Several aspects as to how the final results can be used by various departments in the telephone company to improve service are delineated.