The circuit presented here can be used for connecting two telephones in parallel and also as a 2-line intercom. Usually a single telephone is connected to a telephone line. If another telephone is ...

The circuit provides a simple illustration of a door phone intercom system having a two-way communication using the features of LM386 amplifier. Intercom – short for intercommunication, is an ...

DoorKing’s wireless adapter for the 1812 Series of residential telephone intercom systems will provide homeowners with high quality wireless voice, data and video. The wireless adapter easily connects ...

My condo has an analog intercom/buzzer system. When someone buzzes up, it rings the line in my unit. It it hardwired into the condo - I have no landline service. I can then pick up the call and press ...