CHARACTERISTICS OF TOLL TELEPHONE CABLES 



309 



4Z0 



4-00 



380 



360 



34.0 



320 



300 



280 



260 



240 



Q. 220 



200 



5 180 



120 



60 



40 



20 



10 20 30 40 50 60 70 80 90 100 IIO 120 



TEMP.- DEGREES FAHR 



Fig. 11 — Conductance per mile vs. temperature — 19 gauge pairs 



