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Allow the progress bar to reach 100%. Do not close the browser, turn off the router, or unplug the Ethernet cable during this phase. Step 4: System Reboot and Verification
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Log in with your administrator credentials. Common defaults include:
Connect your computer directly to the ONT using an Ethernet cable. Never update via Wi-Fi .
Log in with your administrator credentials. Default credentials often include: admin or multipro Password: admin , 1234 , or multipro . Step 2: Locating the Firmware Update Section
: Open a web browser and enter the router's IP address (default is 192.168.1.1 ). Log in with your admin credentials.
: If an update fails or the device is unstable, press and hold the Reset button for 10 seconds to restore factory defaults. ZTE C3xx OLT Firmware Upgrade - SmartOLT
Navigate to > System Management > User Configuration Management .
: Most F670L units update automatically during off-peak hours (usually 2:00 AM – 4:00 AM). Ensure your router remains powered on overnight to receive these.
: Always export your current settings before flashing new firmware to ensure you can restore your internet connection quickly.
After installing the firmware update:
Type the default gateway IP address into the address bar: 192.168.1.1 (or 192.168.0.1 , depending on your ISP settings) and press Enter. Enter your administrator credentials.
