Which follow-up would you like?
– A video demonstration of the latest "green" firmware interface which supports PPPoE and Hotspot configurations. Google Docs Key Device Specifications firmware gm219s xpon full
If you are asking for the firmware because your device is stuck in a boot loop or you need to unlock it to work with a different ISP, please provide the exact hardware version and the ISP name written on the label. Without that, a firmware link will likely not work for your specific board. Which follow-up would you like
Optimized firmware to prevent connection hanging during high-traffic or power cycles. firmware gm219s xpon full