This process is risky, may brick the device, voids warranty, and is often irreversible. GPON and EPON are physically different standards (wavelengths, OLT compatibility), so software conversion does not guarantee hardware compatibility with your ISP’s EPON network.
GPON and EPON operate on different protocols and chipsets. GPON uses GEM encapsulation and TDM, while EPON uses Ethernet frames. firmware huawei hg8245h gpon to epon
If your ISP uses EPON, do not buy a GPON HG8245H hoping firmware will save you. Check your hardware revision first, and when in doubt, stick to the official device list provided by your provider. This process is risky, may brick the device,
You should see: success!