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BELL SYSTEM TECHNICAL JOURNAL 



Incoming Calls from Manual to Machine Switching Offices. Calls 

 from manual offices are handled at the machine switching office on 

 the cordless "B" positions. Fig. 24 shows a diagram of the equip- 







Fig. 23 — Call Indicator at an Incoming Trunk Position in a Manual Office 



ment used to connect a call originating in a manual office destined 

 for a subscriber in a machine switching office. Such a call is answered 

 by the "A" operator in the manual office in the usual manner. She 

 takes up the call circuit by depressing her call circuit key to the 



foarHrqTtMw Final Frame 



ABOARD 



Sender I i Sender I I "rui* 



Fig. 24 — Diagram of a Connection from a Manual to a Machine Switching Office 



machine switching office desired, passes the called subscriber's num- 

 ber, and receives a trunk assignment in exactly the same manner 

 as if the call were going to another manual office. The cordless "B" 



