Most web interface firmware upgrades (through 192.168.100.1) will refuse a cross-standard firmware. You must interrupt the boot process via serial console.
This guide assumes your HG8245H is currently running GPON firmware and you have obtained a dual-mode or verified EPON-only firmware.
A few open-source projects have attempted universal firmware: firmware huawei hg8245h gpon to epon
If you proceed, look for a file named HG8245H_V300R017C10SPC150_dual_mode.bin (example only). Always verify MD5 checksums from trusted sources.
cat /proc/cpuinfo
cat /proc/mtd
If your board has a label like HG8245H EPON or Dual-Mode, you’re in luck. If it explicitly says GPON-only, hardware conversion is impossible without replacing the SFP module (which is soldered on most units). Most web interface firmware upgrades (through 192
The conversion of the Huawei HG8245H from GPON to EPON is a testament to the tinkering spirit. It transforms a disposable ISP terminal into a versatile, multi-protocol networking tool. It proves that with enough patience, a screwdriver, and a hex editor, even the most locked-down hardware can be taught new tricks.
At the bootloader prompt, set up your PC as a TFTP server with the EPON firmware file in the root directory. If you proceed, look for a file named
w800> setenv ipaddr 192.168.100.10 # ONT IP
w800> setenv serverip 192.168.100.50 # Your PC IP
w800> update tftp 0x80000000 HG8245H_EPON.bin
The bootloader will flash the new image. Do not interrupt power.
Find a bootloader from a known dual-mode device (e.g., HG8245H with hardware version 4B4.A that supports both). Extract the uboot partition:
dd if=dual_mode_full_firmware.bin of=uboot_dual.bin bs=1k skip=0 count=512
If you only want the web interface to show “EPON” without changing function: