Doorking residential telephone systems provide convenience of communication from a visitor at the gate to any phone in the residence. A visitor will press the call button that will cause a distinctive ring on the residence telephones. The resident can speak to the visitor from any phone in the house and open the gate by activating a preprogrammed button on the phone.

The 1812 connects directly to the resident's phone system, saving monthly bills. When a guest activates the call button a distinctive double ring on each phone announces someone is at the gate. The resident answers the phone and can open the gate by pressing a preprogrammed. Built in call waiting assures the user does not miss any incoming calls when speaking to the gate. Pin codes can be entered in the keypad to grant access to family, and service providers. The "Do Not Disturb" feature eliminates late night nuisance calls. Windows compatible programming permits the resident to use a computer to customize the system.