| Issue | Possible fix | |--------|----------------| | Update fails | Re-download firmware, check file integrity | | No web upgrade option | Use TFTP or contact ISP | | Device stuck after reboot | Hard reset (press reset pin 10+ sec) | | Lost ISP credentials | Re-enter VLAN ID / LOID / PPPoE details |

If enabled, the router detects and installs updates during idle periods (usually late at night).

is an enterprise-grade ONT, firmware files are often restricted.