DVR systems NVR38xx Series - Manual (Page 94)

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Figure 8-23 RS232
Please refer to the following sheet for detailed information.
Parameter Function
RS232 There is only one option COM 01, corresponding to RS232.
Function Console is for debug.
Control keyboard: Switch between RS232 and control
keyboard.
Network keyboard: COM control protocol. You can use
network keyboard to control NVR via COM.
Transparent COM: Network user can communicate with
RS232 COM device.
PTZ matrix: PTZ matrix protocol. You can use the device to
control the PTZ matrix.
Data Bit The value ranges from 5 to 8.
Stop Bit There are three options: 1/2.
Baud Bit You can select corresponding baud bit here.
Parity
There are five options: none/odd /even/mark/space.
8.3.2.5 Network
Network interface is shown as in Figure 8-24.