AUTOMATIC TOLL SWITCHING SYSTEMS 



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2. There is no operator at the TC or TO to select an alternate route 

 and with the equipment there incapable of automatic alternate routing 

 the economies and service protection inherent in the alternate routing 

 procedure would be lost. 



If step-by-step toll switching equipment is already provided at a 

 TC or TO, senders (or directors) could be added, making it in effect a 

 common control switching system. This measure would permit auto- 

 matic alternate routing and the further addition of recording equipment 

 would eliminate the indirect routings for recording purposes. 



A further benefit from having common control equipment in TC's 

 or TO's can be realized in some instances. When a customer is served by 

 a local office that has no senders he must dial one or more directing digits 

 (probably three digits) ahead of the seven or ten-digit number in order 

 to get to an office where senders are provided. It is, of course, desirable 

 to avoid this extra burden on the customer. Where the equipment in a 

 TC or TO can be used in common for switching local and toll traffic 

 the customers whose lines are terminated in that office will be dialing 

 directlj' into senders, if the equipment uses common control, and will, 

 therefore, benefit in that they will not have to dial directing digits. 



CONCLUSION 



The new system was designed to implement the nationwide switching 

 plan, which integrates the switching network of the entire nation into a 

 single unit. This switching job, requiring a high order of mechanical 

 intelligence, is the most comprehensive ever performed by any system. 



The skillful manipulation of code digits enables the provision of a 



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oduced with the latest local crossbar system. 



