Connect your PC directly to the ONT's port via an Ethernet cable.
Never attempt to flash firmware over Wi-Fi. Use a high-quality Cat5e or Cat6 Ethernet cable connected directly to LAN Port 1 of the ONT.
ONTs running firmware versions V300R019 (common in 2020-2021) had a known, but unpatched, backdoor: the su password could be calculated from the WAN MAC using a predictable algorithm (e.g., adminHW or hash-based on serial). Once root shell was obtained via Telnet (port 23), the command boardtype.sh -c epon could be executed. This script rewrote the bootloader’s NVRAM region, flagging the device as an EPON model. firmware huawei hg8245h5 gpon to epon 2021 exclusive
Moving a GPON device to a network that only supports EPON.
Browse and select the transition firmware file. Click . Connect your PC directly to the ONT's port
For those who prefer a command-line approach, some firmware versions allow mode switching via Telnet:
This unique combination of tools allowed users to bypass Huawei’s standard restrictions and access the low-level hardware configuration, enabling the GPON-to-EPON switch. Moving a GPON device to a network that only supports EPON
The "2021 exclusive" usually refers to a packed .bin or .app file designed to be used with the HG8245H5 Epon/Gpon designation. 4. Step-by-Step Guide: HG8245H5 GPON to EPON Conversion
: Flip the router over. Verify the exact model is HG8245H5 . Firmware for the "H" or "Q" variants will fail.
Once the HG8245H5 reboots (allow up to 3 minutes), the color of the PON LED should change behavior. On GPON, it blinks slowly; on EPON, it will lock solidly or blink rapidly depending on your OLT (Optical Line Terminal).
: The default administrator login for many of these conversions is username: Support and password: theworldinyourhand .