Firmware Gm219-s Xpon -

GM219-S XPON ONU is a dual-mode optical network terminal often used in Fiber-to-the-Home (FTTH) solutions. It supports both GPON and EPON

If the default admin/admin or admin/password doesn't work after an update, the firmware might have changed the default credentials. Check the documentation included with the firmware download. firmware gm219-s xpon