Simple Duophone System PCB

Posted on Feb 5, 2014

Here a simple circuit diagram of duophone that allows you to access two telephone line through a single telephone set. The conversation through each line will entirely private when the conference switch in the dual phone is off. So this duophone circuit has a unique feature of talking to two people simultaneously what is called three-party telepho

Simple Duophone System PCB
Click here to download the full size of the above Circuit.

ne conversation/conference facility.

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