The N-SP80VS1 is a SIP compliant Video door station designed for use in combination with the common IP telephone system. You can make conversation with a person standing in front of the door station while monitoring its image through the built-in camera. In a dark environment such as the night, the subject will be detected by the built-in luminance sensor and its image will be taken under the infrared light irradiation. An audio echo canceller function assures high-quality hands-free conversation.Using the built-in relay output, you can unlock the nearby door.The N-SP80VS1 can be operated when connected to a PoE-compatible switching hub using a LAN cable.Another feature includes a multicast audio stream receiving function used for paging.