Chapter 22 - Configuring Serial Protocols 
The Port field configures the serial port to which the DNP device is attached. If the 
entry is for a remote DNP device, i.e. the DNP device is attached to the serial port of 
remote IP host, the value of this parameter is 'Unknown'.
Device Address Table
This table displays all currently known active DNP devices.
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Figure 182: DNP Device Table Settings