11
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.
