LONG DISTANCE TELEPHONE CIRCUITS 



527 



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m 40 

 o 



UJ 



Q35 



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I, 



1500 2000 2500 3000 3500 



FREQUENCY IN CYCLES PER SECOND 



4500 



Fig. 1 — Representative return losses on 19-ga. B-88-50 side circuits. 37 per cent of 

 the measurements show lower return losses. • 26 circuits Newark to Princeton. 



60 

 55 

 50 

 45 



140 

 135 

 ,30 

 ' 25 



20 



I 



16 

 10 

 5 



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6 



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 o 



1500 2000 2500 3000 



FREQUENCY IN CYCLES PER SECOND 



3500 



Fig. 2 — Representative return losses on 19-ga. H-88-50 side circuits. 37 percent 

 of the measurements show lower return losses. O 26 circuits Princeton to Newark. 

 • 26 circuits Princeton to Philadelphia. 



