Thread: Siemens ship telephone
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Old 22nd Jun 2017, 8:21 am   #6
keithinuk
Retired Dormant Member
 
Join Date: Mar 2011
Location: Hertfordshire, UK.
Posts: 208
Default Re: Siemens ship telephone
I do have the wiring diagrams with it, it has an adjustable resistor for some volume control.
The black and read wire is the input for the ring indicator.
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