1982/83 end office connection study: Analog voice and voiceband data transmission performance characterization of the public switched network.

A comprehensive system-wide field study, referred to as the 1982/32 End Office Connection Study, was undertaken by Bell Laboratories from October, 1982 through January, 1983 to characterize the transmission performance of the Bell System public switched telecommunications network. Analog voice and voiceband data transmission parameters were measured on about 6500 Direct- Distance-Dialing (DDD) connections among 20 end-office buildings sampled throughout the continental United States. This paper presents the results of the EOCS data analysis; a companion paper describes the measurement equipment and the sampling plan.