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The lack of communication may be caused by the following conditions:
- Make sure that no other application is using the serial port if the UPS is connected with a serial cable.
- Make sure the serial or USB cable is securely and properly connected to the UPS and computer.
- The network communication between the Client computer and the UPS/PDU/ATS is down.
- The device network address is configured improperly.
- The authentication settings are configured improperly.
- Verify the device network address is correct.
- Verify the network configuration in the device is correct. Use the Power Device Network Utility tool to configure the device network configuration.
- Verify the settings on the Security/Authentication page are correct and match the settings of the UPS/PDU/ATS. See Security/Authentication for more details.
- Verify the port on the Security/Network page is matched if establishing communication with Agent.
- Check the network status of the UPS/PDU/ATS and Clients.
- Verify firewall settings. Port 3052(UDP/TCP), port 53568(TCP), port 162(UDP) and port 53566(UDP) should be unblocked. The Client communicates with UPS/PDU/ATS and Agents using these ports.
