TRANSMITTED FREQUENCY RANGE FOR CIRCUITS 



491 



shows a reasonably long trunk having a 5 db loss at 1000 cycles (6.4 

 miles). In practice, of course, the trunk length may vary from a 



2000 3000 



FREQUENCY-CYCLES PER SECOND 



Fig. 4 — New station-set characteristics (including two one-mile 24-gauge loops con- 

 nected by distortionless trunk). 



> 5 



I- 



1000 2000 3000 4000 5000 



FREQUENCY-CYCLES PER SECOND 



Fig. 5 — Toll connecting trunk characteristics. 



fraction of a mile to 10 miles or more, with a corresponding effect on 

 the transmission characteristic. It will be noted that the effective 



