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BELL SYSTEM TECHNICAL JOURNAL 



absent due to the unusual characteristics of the cables. The adop- 

 tion of such a system also made possible the employment of standard 

 units of equipment of the most recent design. The general nature 

 of the system and the arrangement of the component parts is shown 

 diagrammatically in Fig. 4. Fig. 5 is a simplified circuit diagram 



M 



20 



15 



IS ZO Z5 



FREQUENCV- KILOCYCLES 



35 



Fig. 2 



To Ts 20 z3" 



F»»EQUENCY- KILOCVCLE.S 



M 



Fig. 3 



