pdf SWBT Service and Equipment Manual [05] - Part VI: PBX Services Sect. 3 - 4 Manual PBX Switchboards Popular

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SWBT Service and Equipment Manual [05] - Part VI: PBX Services Sect. 3 - 4 Manual PBX Switchboards

ca 1948 with later additions. Includes Non-multiple manual cord switchboards and multiple manual cord switchboards. References PBX numbers 551A/B/D, 555, 605 (small). 605 (large), 606A, 607A/B. 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: Private branch exchange; dial; attendant; supervision; stations; trunks; tie lines; night service; central office trunks; cord switchboard; 551A; 551B; 551D; 552D; 555; 605A; 606A; 607A; 607B; supervision; off-premises stations; station busy. identification. Contributed and scanned by Steve Cichorsky. OCR and processing by Paul Fassbender.

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