324 



BELL SYSTEM TECHNICAL JOURNAL 



&.0 



7.5 



7.0 



6.5 



6.0 



1^ 5.5 



^ 5.0 



a. 



^ 45 



(/) 



_J 4.0 



UJ 

 CO 



n 3.5 



3.0 



2.5 



Z 20 



O 



H 1.5 



If) 1.0 



160 



180 



200 



20 40 60 80 100 120 



FREQUENCY- K I LOCYCLES 



Fig. 25 — Carrier frequency loss* of toll entrance cable; non-loaded, quadded — tempera- 

 ture 60°F., approx. 

 *Insertion loss between 125-ohm resistances 

 160 



2 



X 150 



O 



UJ 140 

 O 



< 130 



I- 

 (/) 

 Si 120 



60 80 100 120 



FREQUENCY-KILOCYCLES 



160 



180 



200 



Fig. 26 — Carrier frequency impedance of toll entrance cable, Denver, Colo.— 19 gauge, 

 quadded, non-loaded — terminated in 125 ohms 



