THE INTERCONNECTION OF TELEPHONE SYSTEMS 537 



(A) 





^ V 



(B) 



(C) 



(D) 



Fig. 6^Genesis of a graded multiple. 



available. That is to say, we should be able to capitalize the possi- 

 bilities of teamwork between the more lightly loaded parts of the 



groups. 



TABLE I 



Load Carried by Each Trunk of a Straight Multiple 



Average Submitted = a = 2.96 



This may be done by arranging the two groups as in Fig. 6(B) so 

 that the cross-connection of the last choice trunks provides an oppor- 



