218 



APPLIED SCIENCE 



distributing frame (Fig. 96). The main distributing frame 

 allows the entering wires of the subscribers' lines to be changed 



FIG. 95. Terminal Room in an Exchange. 

 (a) Relay rack. (6) Intermediate frame, (c) Cables to switchboard 



without changing the telephone number. The intermediate 

 distributing frame is so constructed as to permit an> call 

 to be answered at any portion of the switchboard. Thus no 

 individual operator need be overloaded with calls. 



