NEIV YORK-CUICAGO CABLE 87 



nomical arrangement that will furnish the service required over each 

 circuit group. The examples described above are of circuits used for 

 business between the terminals indicated and if these circuits were 

 to be connected to others extending to points considerable distances 

 beyond these terminals different arrangements would be required. 

 The cable conductors used in building up these telephone circuits 

 can be ccmposited and telegraph circuits are thus provided for simul- 

 taneou!^ operation with the telephone circuits. 



Conclusion 



In the above discussion, an effort has been made to furnish some 

 descriptive information regarding a complete cable system recently 

 completed and now in successful operation between Philadelphia and 

 Pittsburgh and designed for long-distance telephone and telegraph 

 service. In one sense this discussion may be considered a report of 

 the present status of the toll cable plant intended to connect Atlantic 

 Seaboard cities wdth Chicago and other cities, and extensions are now 

 under construction. However, most of the general methods which 

 it is planned to use in these extensions are not expected to differ 

 greatly from those described. 



This cable system utilizes many new developments in the com- 

 munication art and some of these, which have been briefly touched 

 on here on account of their important application, have been described 

 in more detail in previous papers. It is expected that more informa- 

 tion regarding other specific developments which have contributed 

 in an important way to the successful carrying out of this project 

 or which may be utilized later on will be furnished in future papers. 



An important feature of this cable project is the fact that while 

 many new developments and practices are utilized, the design of the 

 system as a whole is such as to fit in economically with existing wire 

 and cable systems and proposed extensions. 



