F.NGiM'.i:His\: /'/?()/v/./;.u.s ()/• ////; Hi.i.i. sy.sir.M 



'x\7 



prohk'iu iinoUi'cl in workiiin out tlir most ill'iiifiil Irunkiii); pi. in for a 

 ciiy sui-h as Ni-w York or (."liicMkjo. 



Aside from tlu- layout of llu- trunk plant itsolf, tin- unnini-i-rinj; work 

 involves the design and construction of tlu' underground subway 

 sNstem and the desikjn of the physical cable i)lani. In one >'ear in 



Kig. 1 



liii^ <',rei'n ti'lfphoiic hiiililini;. New \'()rk C'it\- 



New York City alone, enough cable has been installed and |)laced in 

 service to make a cable containing 1,2()U wires reaching trom New 

 N'ork to Chicago. 



The expansion of the metropolitan plant to care for the increase in 

 the number of subscribers also in\olves, of course, opening many new 

 offices and the provision of new switchboards and additions to the 

 existing switchboards. The matter of selecting the name for a new 

 central office would at first apjx-ar to be a simple one, but as indicated 

 by Fig. 14 it is a very involved problem in itself. As will be noted, 

 there are many ciuestions to be considered. One feature relates to 

 the matter of dialing. It is interesting to note from Fig. 14, however, 

 that while the name "John" does not seem in any way to contlict 

 with the name " KiiickiTbdcker." \et these two names could not be 



