pdf Cord Switchboard Service Manual NonMultiple Types 550 551 560 IBT PBX-75 Jul61 Popular
By Paul F 3024 downloads
IB_PBX-75_Jul61_Switchboard_Service_Manual_Non_Multiple_Types_550_551_560_tci_ocr.pdf
11MB. July 1961, Illinois Bell, PBX 75. Photos of switchboard.
Contents (TOC)
How to Help Your Extension Users 1
Private Switchboard Services 3
To Private Switchboard Operators 5
Out of Town Calls 10
Description of the Switchboard 15
Method of Operation 16
- Incoming Calls 17
- Calls from Extensions 21
- Handling Established Connections 24
- Night Connections 26
- Conference Calls 26
Suggested Phrases
The Courteous Way...
Contributed by Steve Cichorsky. OCR / Size reduction by Clint Gilliland.
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