Abstract :
This paper states the nature of the telephone transmission problem, and shows the importance of the attenuation constant. The effect of varying the line constants is discussed and summarized in a table, and the improvement obtained by the addition of inductance in the form of loading is illustrated. Tables are given of the coil-loaded and continuously loaded cables laid. It is pointed out that superimposing gives an extra circuit in a 4-wire cable, but is limited by the overhearing. The introduction of telephone repeaters necessitates a smooth impedance/frequency curve for the cable, and this is more readily obtained with continuous loading. The paper concludes with a comparison of the two methods of loading, and shows that the balance of advantages is on the side of the continuously loaded cable.
