TFY fills OEM needs worldwide for feature packed as well as versatile Video Door Phones. Streamline designs, easy to install and pleasant musical ring tones please end-users. Other features include B/W or color displays as well as anti-jamming capability and an independent unlocking control which prevents system impact. Single phone with multiple cameras or multiple phones with single camera configurations are available. The Video Door Phone can also be integrated with alarm systems. All equipment is in accord with the GA/T72-94 standard.