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SWBT Service and Equipment Manual [04] - Part VI: PBX Services Sect. 1-2 PBX Services & Switchboards

ca 1948 with later additions.  Includes PBX Services, Attendants' Telephone Sets, CO Trunks, Manual Cordless Switchboards, Cordless Switchboards, Operation of 506A/B Switchboard, 507A/B switchboards.  Other parts of this manual are in seperate 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: Private branch exchange; dial; supervision; stations; trunks; tie lines; night; central office; 506A; 507A; 506B; 507B; stations; supervision. Contributed and scanned by Steve Cichorsky. OCR and processing by Paul Fassbender.

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