F.NGmEERlNG PROPl.EMS OF THE PF.I.l. SVSTFM 



'-29 



Thi- cable is for most of its clistanro siriing on pole lini-s and these lines 

 were (li-si^ned especially to wilhslanil the stresses cause<l during sleet 

 slornis. The decision as to wlicllui llie caMe should be iindcri^rninid 



hig. (> — Hank of 2-wire teU'phnnc rcpt-aters 



or aerial in the \-arious sections in itself in\ol\e<] iiian\- engineering 

 considerations. 



In addition to the engineering matters in connection with the cable 

 itself, other interesting problems present themselves, of course, with 

 regard to the design and construction of the telephone repeater stations 

 and their associated equipment, the telephone repeaters being inserted 

 in circuits of this character at intervals of about 50 miles. A typical 

 re()eatcr station is shown in Fig. .5, a bank of two-wire repeaters in 

 Fig. 6, and a bank of four-wire repeaters in Fig. 7. 



P'ig. 8 shows a view of the completed cable. In this case a loading 

 coil case is also shown, and the picture indicates again the physical 

 problem of erecting a cable through the less accessible sections of the 

 territory'. Fig. 9 shows another section of the completed cable through 

 open country, and shows loading coil construction and facilities for 



