Download the EPON firmware version from the Huawei website or other authorized sources.
Here is a step-by-step guide to upgrading the firmware of the Huawei HG8245H5 to the 2021 exclusive EPON firmware: firmware huawei hg8245h5 gpon to epon 2021 exclusive
Connect to the HG8245H5 using a computer or mobile device via a web interface. The default IP address is 192.168.1.1 , and the login credentials are admin for both username and password. Download the EPON firmware version from the Huawei