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4． Back panel introduction
1、 Alarm-RS485 connection 2、 AUDIO OUT audio output 3、 AUDIO IN audio intput 4、 power switch
5、 power plug 6、RS232 connection 7、 VGA connection 8、 USB connection
9、 NET network connection（ RJ45） 10、 VEDIO OUT vedio output 11、 VEDIO IN vedio input
Network connection note: When connect to the network card of the computer, please use reverse line; when connect to the
exchanger or Modem, please use positive line.
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