. The Bell System technical journal . 2 ii O 1-UJ z o *» £; I o5 0- cl en cn ucc. <3 ja- EZ3 EH CO Sj 0J <u H c c S- to j j CD <L) — ~J nc o. in <n a, EC CO ^ y s XZBBBBfl PRACTICAL APPLICATION OP CARRIER SYSTEMS 49 within the next few years but in the meantime, the use of carrierapparatus enables the traffic growth to be taken care of withoutstringing wire which, under the circumstances,would be very expensive. There are, at present, operating between Harrisburg and Chicago,one 4-channel telephone system and between Pittsburgh and Chicago,two 3-channel systems, providing a total o
. The Bell System technical journal . 2 ii O 1-UJ z o *» £; I o5 0- cl en cn ucc. <3 ja- EZ3 EH CO Sj 0J <u H c c S- to j j CD <L) — ~J nc o. in <n a, EC CO ^ y s XZBBBBfl PRACTICAL APPLICATION OP CARRIER SYSTEMS 49 within the next few years but in the meantime, the use of carrierapparatus enables the traffic growth to be taken care of withoutstringing wire which, under the circumstances,would be very expensive. There are, at present, operating between Harrisburg and Chicago,one 4-channel telephone system and between Pittsburgh and Chicago,two 3-channel systems, providing a total of 10 carrier telephonechannels. These will be supplemented by at least two additionalsystems before the cable is completed. As soon as the cable is in-stalled the carrier systems will probably be removed from servicehere and reinstalled in other locations. In most cases the problem of providing additional circuits is not asdifficult as in the section between Pittsburgh and Chicago. Forthis reason the relative economies of providing circuits by carrierand by the other methods
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
