3PrefaceFeaturesThe Network Disk Recorders WJ-ND200 are designed for use within a surveillance system, and perform recordingsand playbacks pictures from network cameras in the system.The network disk recorder is a recording device using a hard disk drive to record camera pictures instead of usingvideo tapes so that pictures recorded by repeated overwriting will not experience deterioration of the recorded pic-ture quality.Up to 16 cameras can be connected via a network and it is possible to record their camera pictures. It is possible toperform the settings or operate the WJ-ND200 (this unit) using a web browser installed on a PC connected to a net-work. Up to 4 PCs (web browsers) can access this unit concurrently and it is possible to perform the settings andoperate this unit.Recording FunctionsMulti-recordingIt is possible to perform multiple recordings using a single network disk recorder even if the operating environmentsare different, for example, recording pictures of cameras in different places at different times.Schedule recordingIt is possible to perform recording automatically at a scheduled time on a designated day of a week. It is also possi-ble to perform recording at a different recording rate according to time range.Emergency recordingIn the case of an emergency, emergency recordings will be given a higher priority than other recording modes byoperating an external switch.External timer recordingIt is possible to perform recording automatically using an external timer.Event recordingAt an event occurrence, such as an alarm signal is supplied, the recording mode (recording rate) can be changed tohigh rate to record pictures.2.5 inch removable hard diskTwo removable hard disks are provided, and they can be removed and inserted easily and quickly on the front of theunit.When using two hard disks, it is possible to replace the hard disks without interrupting recording.Downloading/Transmitting ImagesIt is possible to download (save) the currently displayed image in the web browser window onto the hard disk of aPC. By establishing an FTP server, it is possible to transmit images to the designated FTP server periodically. Whenan event occurs, it is possible to transmit images from the camera installed in the place where the alarm occurred.Event Notification FunctionWhen an event occurs, it is possible to send e-mails to designated addresses to notify of the event occurrence. It isalso possible to send an e-mail with an image recorded when the event occurred.