ELECTRONICS IN TELEPHONE SWITCHING SYSTEMS 



1005 



Fig. 14 — No. 5 route relay frame. 



The form of memory available in electronics is considerably different 

 from that which has been previously available. Electronic memory has 

 been characterized as "common medium" or "bulk" memory. A single 

 device is used capable of storing more than a single bit of information 

 which is the limit of most relays or other devices capable of operating in 

 a bistable manner. A number of different types of electronic bulk 

 memories have been devised for digital processing. They differ appre- 



