,V().\//; ri:h;y /.o.vc, i i-.i.r.riKKxr: cikcciis 



4<» 



.iinntiiit lit »'(|iiipnu'iil ,il iMcli of the rc|HMtfr slalioDs as illustralcd 

 In- l-iji. 2 vvliii-li shows a simplitii'd i-(|iii|)iiU'T)l la\()iit at a t\pical 

 n-poaliT st.ilion. In addition to this numlHT of circuits, a rarrit-r 

 rurrcnt ti'lcphom- systt-ni or an additional carrit-r current telegraph 

 s>stt'ni can hv pnnidcd and operated o\er these same wires at such 

 time as tratVic growth ma>- warrant. 



In view of the importance and iuiml>er of ser\ices routed over the 

 through wires, careful consideration was j»i\en to construction fea- 

 tures. Copper line wire Iti") mils in diameter affording high mechan- 

 ical strength as well as low tr.msmission loss was provided. I'"or a 



SOCMATIC CncUT DiAKAM 



KiR. i 



large part of the distance an existing pole line oxer this route was 

 us«l, hut a new line was constructed in certain sections where the 

 existing line was carrying full capacity load or was otherwise not 

 suitable, and in other sections to avoid, as far as practicable, the use 

 of intermediate or toll entrance cable. In a number of cases an im- 

 portant consideration in rerouting was the avoidance of exposures to 

 electric light and power circuits. Considerable pole replacement 

 woik also was done in some of the existing pole line sections to 

 strengthen the structure. The wires were transposed in accordance 

 with a design' providing low cro.sstalk values at the freqiencies used 

 in carrier operation as well as within the voice range. 



In determining the location of repeater stations for the telephone 

 circuits, direct current telegraph and carrier systems, it was neces- 



' "Carrier Current Telephony and Telegraphy," K. II. Colpitis ami O. H. Blaik- 

 well. Journal A.I.E.E.. Vol. XI.. No. 5, May. 1021. 



