Channel Vision™s Telephone Entry System creates a communication link between your front door and every telephone in the house. The TE110 sends a distinctive ring to every telephone when the doorbell is pressed. Simply pick up any telephone handset and press "#" or "*" twice to begin speaking to the visitor. The TE110 also includes an option to operate a door strike relay when used with the TE110DS (sold separately). Combine this unit with a Channel Vision RF Modulator and IU or DP series camera (shown below) for a complete and easy to use residential audio/video access control package. The Intercom units are available in a wide variety of finishes.