Incorrect CLI commands can permanently brick the ONT. Only use these if you have the full engineering manual.
Your first interaction with the ZTE F620G will likely involve staring at blinking lights. The LED panel is your diagnostic dashboard. Here is the decoded legend from the OEM manual: zte zxa10 f620g manual
Once logged in, you will see a minimal interface compared to standard routers. Key sections: Incorrect CLI commands can permanently brick the ONT
Connect the 12V DC power adapter. The Power LED should turn steady green. 3. Configuration and Login Guide zte zxa10 f620g manual