THE TORONTO-BARRIE TOLL CABLE 



601 



These return loss measurements were made on pairs looped back at the 

 cross-connecting box and terminated at Barrie in one of the ne'tworks. 



Completion Tests 



Upon completion of the cable, further overall tests were made. 

 Particular attention was paid to those tests made from the Toronto 

 end, to determine the efifects of the use of the reloaded and respliced 

 toll entrance cable. 



Attenuation measurements at 1000-cycles were found to agree 

 closely but, due to the effects of the toll entrance cable at Toronto, 



3000 

 2900 

 2800 

 2700 

 2600 



q 2500 



I 



° 2400 



z 



^ 2300 



z 



i^ 2200 



I/) 



^ 2100 



2000 



1900 



1800 



1700 

 1600 



-20 I 



-40 i 



z 



-60 - 



UJ 



O 

 -80 5 



o 

 -100 g 

 z 

 120 



400 800 1200 1600 2000 2400 2800 3200 



FREQUENCY IN CYCLES PER SECOND 



Fig. 9 — Impedance measured at Toronto. Termination at Barrie, 113 type 

 network. Sending-end, half section. Makeup from Toronto, 10.8 miles 16-ga., 

 0.062 mf. per mile, 0.0483 mf., 32.8^ per load section; 48.7 miles 19-ga., 0.085 mf. 

 per mile, 0.0483 mf., 48.9'' per load section. 



not to lend themselves to such rigorous analysis as those previously 

 made. 



To show one of the effects of the Toronto toll entrance cable, Figs. 9, 

 10, and 11, showing the resistance and inductance components of the 

 impedance measured at Toronto, are included. These indicate that 

 the important departure from the network characteristic for these 

 pairs occurs in the inductance component at the lower frequencies. 

 This departure is probably due to the difference in the loading section 



