pdf C65.791 Miscellaneous Station Circuits -NY Tel IB Jul39 Popular
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C65.791NY_IB_Jul39_Misc_Station_Circuits_Connections.pdf
- Figure 1 - Intercommunicating System ?C? Speaking Tube ~ For Maintenance Only
- Figure 2 - Combination Telephone and Telautograph Circuit
- Figure 3 - Private Line Monitor - Private Line Equipment Box
- Figure 4 - Station Register Connections - Manual Individual Line Stations
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