N-1 CARRIER TELEPHONE SYSTEM 



437 



subassemblies and equipment units. The surfaces are reasonably smooth 

 as cast and the natural aluminum finish is rather pleasing in appearance, 



Fig. 14 — Commercial installation of N-1 carrier terminal equipment showing one com- 

 plete terminal. At the bottom of the relay rack may be seen an experimental model of a 

 blower and associated air hose connections. 



SO that no further finishing operations are necessary. Equipment designa- 

 tions to identify components are incorporated in the die by the use of 



