ii3.2 About Front Panel and Real Panel ............................................................. 173.3 HDD Installation............................................................................................. 173.3.1 CJ-HDR216 ................................................................................................ 173.3.2 CJ-HDR416 ................................................................................................ 183.3.3 Rack Installation ........................................................................................ 193.4 Connecting Power Supply ........................................................................... 193.5 Connecting Video Input and Output Devices ............................................ 193.5.1 Connecting Video Input ............................................................................ 193.5.2 Connecting Video Output ......................................................................... 193.6 Connecting Audio Input & Output, Bidirectional Audio ............................ 203.6.1 Audio Input ................................................................................................. 203.6.2 Audio Output .............................................................................................. 203.7 Alarm Input and Output Connection ........................................................... 203.7.1 Alarm Input and Output Details ............................................................... 213.7.2 Alarm Input Port......................................................................................... 223.7.3 Alarm Output Port...................................................................................... 223.8 RS485 ............................................................................................................. 233.9 Other Interfaces ............................................................................................. 234 OVERVIEW OF NAVIGATION AND CONTROLS .................................. 244.1 Boot up and Shutdown ................................................................................. 244.1.1 Boot up ........................................................................................................ 244.1.2 Shutdown .................................................................................................... 244.1.3 Auto Resume after Power Failure .......................................................... 244.1.4 Replace Button Battery ............................................................................ 244.2 Startup Wizard ............................................................................................... 25