HIKVISION DS-6900UDI User Manual page 31

Step 2 Select a transparent channel from the list to configure.
Step 3 Click Modify to modify the parameters of the selected transparent channel.
Step 4 Select the Local Serial Port and the Remote Serial Port to RS-485 or RS-232.
Local Serial Port: the serial port used as the transparent channel by the decoder.
Remote Serial Port: the serial port used as the transparent channel by the encoding device.
You can click Delete to pop up the following dialog box and click OK to delete the selected channel.
Audio and Video Decoder  User Manual
Figure 4-18 Transparent Channel Interface
Figure 4-19 Modifying Interface
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DS-6900UDI Decoder User Manual