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 telephone conversation/conference facility.
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Circuit Diagram of Simple Duophone System : Right Click >> View Image to view full size |
The complete idea and description of this dual telephone circuit can be available by downloading this PDF document.
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1 comments:
hi... plz tell me what is telephone line1 and telephone line2 since it is to be done only with a single telephone.
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