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BELL SYSTEM TECHNICAL JOURNAL 



levers readily accessible to the attendant. The control panel equip- 

 ment may be varied to meet the different service requirements. 

 Space is available on a shelf on the inside for a rectifier or an apparatus 

 bo.x where this additional equipment is necessary. 



Fig. 9 — Typical teletypewriter subscriber equipment for attended service. 



A typical circuit arrangement for a station connected to a TWX 

 switchboard is shown in Fig. 10. The station is equipped with a 

 switch which, w^hen operated, applies power to the motor of the 

 teletypewriter, and also closes the loop so that a relay in the central 

 office is energized. This relay lights the answering lamps associated 

 with the subscriber's multiple in the face of the switchboard. An 



