pdf Cord Switchboard Service Manual NonMultiple Types 550 551 560 IBT PBX-75 Jul61 Popular

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Cord Switchboard Service Manual NonMultiple Types 550 551 560 IBT PBX-75 Jul61

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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Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

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