Front Door Intercom products manufactured by Channel Vision provides communication between the front door intercom and any phone in the house. When a visitor presses the doorbell button the phones in the house will ring with a distinctive telephone ring on every phone in the house. The home owner can then speak to the person at the front door by answering any of the ringing phones in the house and select *9 to activate a door strike buzzer to let the person enter the front door or gate. For additional security and comfort, add a camera to see the person on your computer, dedicated monitor or any TV in the house.