PABX No. 4 (STC)


Pictures of an STC PABX 4 (Pictures dated 1966)

General view of equipment room

 

Group Selectors

 

Junction Relaysets

 

Linefinders and Final Selectors

 

Linefinder Rack

 

Position Rack

 

Position Relaysets

 

Ringer Rack

 

 
 
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Last revised: January 18, 2022

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