GPON and EPON are inherently incompatible protocols; GPON generally offers higher efficiency and bandwidth (2.5 Gbps) compared to EPON's symmetrical 1 Gbps.
You should see:
suggest this is a high-risk procedure that often results in permanent hardware damage. Key Performance & Safety Risks Irreversible Damage firmware huawei hg8245h5 gpon to epon 2021 exclusive