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BELL SYSTEM TECHNICAL JOURNAL 



Long Cable Circuits 



Present plans are to retain H-44-25 four-wire circuits for the inter- 

 mediate and longer distances. This type of circuit is well known so 

 it is unnecessary to go into its characteristics. With the idea of trans- 

 mitting frequencies up to about 3,000 cycles with very little evidence 

 of phase distortion, phase correctors are being considered for very 

 long circuits of this type, say, circuits exceeding 1,000 miles in length. 



