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BELL SYSTEM TECHNICAL JOURNAL 



received current Is a function of both the resistance between the 

 duplex sets and the resistance in the battery branch of the circuit, 

 as shown by equation (11); G in this equation corresponds to Ri in 

 equation (1) and T represents all the resistance between the duplex 

 sets, this being augmented by the addition of resistance at points 

 (3). Therefore, any increase in the resistance in the battery branch 

 of the circuit or in the resistance between the sets, such as will result 



100 200 ZOO 400 £00 600 700 aoo 900 1000 1100 iroo 



Fig. 4 — Line and Received Currents vs Line Current Regulating Resistance in 

 Three Different Locations — (1000 Ohm Line) 



