TRANSLATORS AND IDENTIFIERS IN SWITCHING SYSTEMS 



599 



system. This terminal is cross-connected to a "stop-point" or code-point 

 location terminal to which the rotary translator switch is driven. The 

 brushes of the switch make contact with terminals in this position which 

 are arbitrarily cross-connected to various groups of code marking leads for 

 controlling the required selections. 



In the first use mentioned above it was economical to provide one of 

 these translators for each sender. In other cases, particularly those in- 

 volving a larger number of translations, the device was sufficiently expensive 

 to warrant a group of translators for use in common. 



CODE 



points'^ 



<B 



ROUTE 

 ^RELAY 



TERMS. 



•— ®- 



V- 



TOTAL NUMBER 

 VARIES AS REQUIRED 



Fig. 5 — Relay translator for 3-digit office-code. 



It should be noted that this translation arrangement in reality consists 

 of an initial decimal to centesimal translator such as shown in Fig. 3, formed 

 by part of the register switches. This is followed by a cross connection 

 which changes the systematic translation which has already been achieved 

 to an arbitrary translation in the foim of a mark on one of the stop points. 

 This is followed by the translation achieved by the rotary switch which 

 converts the one-out-of-one-hundred code to one consisting of marks on 

 numerous code marking leads. 



We shall now see how this method is in principle followed by translators 

 used in modern systems. 



Figure 5 shows a translator used in a modem crossbar office and, with 

 variations, in other modern offices for translating the dialed office-code to 



