IC Realtime Max Series: 4/8/16 Channel D1 1.5U Standalone DVR - Manual (Page 18)

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Please refer to the following sheet for detailed information.
1 Power button
2 Power input port
3 Fan
4 RS232 port
5 Video input
6 Video VGA output
7 Video SPOT output
8 Video output
9 Audio input
10 HDMI port
11 eSATA port
12 Audio output
13 Bidirectional talk input
14 USB port
15 RS485 port
16 Alarm input/alarm output
17 Network port
18 GND port
2.3 Connection Sample
Please refer to Figure 2-3 for connection sample.