5CONTENTSLimitation of Liability ................................................................................................................................... 3Disclaimer of Warranty ............................................................................................................................... 3Important Safety Instructions ...................................................................................................................... 4Precautions ................................................................................................................................................. 6Preface ....................................................................................................................................................... 8Features ..................................................................................................................................................... 8About these Operating Instructions ............................................................................................................ 9Trademarks and Registered Trademarks ................................................................................................... 9Network Security ........................................................................................................................................ 9Major Operating Controls and Their Functions ........................................................................................... 10 Front View ............................................................................................................................................ 10 Rear View ............................................................................................................................................. 12Rack Mounting ............................................................................................................................................ 13Connection ................................................................................................................................................. 14How to connect the unit with PCs and cameras ....................................................................................... 14Connection between cameras and PCs ................................................................................................... 15 How to Use the Terminals of the ALARM/CONTROL Connector ......................................................... 17 How to Use the Terminals of the ALARM Connector ........................................................................... 21Turn On/Off the Power of the Unit .............................................................................................................. 23Turn on the power of the unit ................................................................................................................... 23Turn off the power of the unit ................................................................................................................... 23Check the IP Address ................................................................................................................................. 24How to Replace the Hard Disks .................................................................................................................. 25Troubleshooting .......................................................................................................................................... 27Specifications ............................................................................................................................................. 29Standard Accessories ................................................................................................................................. 29