pdf SWBT Service And Equipment Manual [03] - Part V Section 1: Key Equipment (Cabinets) Popular

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SWBT Service And Equipment Manual [03] - Part V Section 1: Key Equipment (Cabinets)
ca 1948 with later additions.  Includes Multi-line key cabinets, providing line pick-up and hold functions, numbered 100, 101, 103A, 109A, 110A, 102A and 111A.  Other parts of this manual are in separate documents.  The number in brackets [n] is the sort order for this document based on the documents currently in the Library.  It may change as new sections of the manual are added.
 
Keywords:  Attendant?s key cabinet; exclusion; intercommunication; order tone; signaling; airport
 

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