9PrefaceFeaturesThe Digital Disk Recorder WJ-RT416 is designed for use within a surveillance system. The digital disk recorder is a recordingdevice using a hard disk drive to record pictures of surveillance cameras instead of using videotapes so that pictures record-ed by repeated overwriting will not experience deterioration of the recorded picture quality.Up to 16 cameras can be connected directly with this unit and it is possible to record images from them. It is also possible todisplay images from multiple cameras (multi-screen), to display images from a camera to camera sequentially (sequential dis-play), and to operate the connected cameras using the recorder.The following models are described as "WJ-RT416" in these operating instructions.• WJ-RT416K: No built-in HDD is provided• WJ-RT416: Built-in HDD x1• WJ-RT416VK: Built-in DVD drive x1, no built-in HDD is provided• WJ-RT416V: Built-in DVD drive x1, Built-in HDD x1Various Recording FunctionsReal time recordingImages from all connected cameras (up to 16) can be recorded at 30 ips.Timer recordingIt is possible to perform recording automatically at a scheduled time on a designated day of the week.Terminal recordingRecording will start automatically when an event occurs such as when a signal is input from a sensor, etc.Video motion detection function (VMD)Recording will start automatically when motion is detected in the area set in advance.Remote operation via a networkIt is possible to perform the settings or operate the unit using a PC via a network such as a LAN (local area network). It is alsopossible to monitor images from the cameras connected to this unit.Alarm notification functionNotification can be provided to a PC when an event occurs.Security Function and ReliabilityUser authentication function (registration of user name and password) allows users access to predetermined selection of theavailable functions.Internal CD/DVD drive (Only for the WJ-RT416V)Images recorded on the internal hard disk drive can be copied onto a CD or a DVD. (It is impossible to play CD/DVD with thisinternal CD/DVD drive.)