The Huawei HG8245H is one of the most popular Optical Network Terminals (ONTs) used by ISPs worldwide. By default, these devices come locked to a specific PON standard—either GPON or EPON.
However, many users want to repurpose a GPON device on an EPON network (or vice versa). This guide covers the technical feasibility, risks, and the general process required to cross-flash the HG8245H.
New EPON ONTs (e.g., Huawei HG8240E, HG8040E) cost less than $20. The time spent unbricking a GPON device is not worth it. firmware huawei hg8245h gpon to epon
| Feature | GPON | EPON | |--------|------|------| | Standard | ITU-T G.984 | IEEE 802.3ah | | Downstream | 1490 nm | 1490 nm (same) | | Upstream | 1310 nm | 1310 nm (same) | | Protocol | GEM (GPON Encapsulation) | Ethernet frames directly | | OAM | OMCI | MPCP & OAM |
The HG8245H (GPON version) uses a dual-mode capable chipset (e.g., Lantiq PEF98036 or Huawei SD5171) in some hardware revisions, but the optical module is single-mode GPON. Even if you flash EPON firmware, the laser driver will not understand EPON burst mode timing or MPCP discovery. Complete Guide: Converting Huawei HG8245H from GPON to
You need an unlocked firmware that allows changing the fiber mode.
Standard ISP firmware hides this option.
Search for:
HG8245H V300R016C10SPC150 (unlocked)HG8245H V300R017C10SPC200HG8245H EPON firmware (direct flash if available).Do not flash random EPON firmware from a different hardware revision.
.cfg file using huawei_config_decrypt.exe or xml_cfg_decrypt.py.<X_HW_UpPortMode>1</X_HW_UpPortMode>
2.After reboot, log back in and check the optical stats: 1310nm Rx for GPON
WAP> display optical-module
If you see Rx power: -∞ or PON LED blinking forever, your laser may not support EPON wavelengths (1490nm Tx, 1310nm Rx for GPON; EPON uses similar but different framing). Some units work, some don’t.