If you have confirmed your HG8245H revision supports dual-mode operation, follow these procedural steps to modify the configuration. Step 1: Establish Superadmin Access
Converting the Huawei EchoLife HG8245H from GPON to EPON via firmware is a common community workaround but is not officially supported
Connect a USB-to-TTL serial adapter directly to the TX/RX pins on the ONT motherboard. Use the bootloader (U-Boot) menu to re-flash the original GPON stock firmware via TFTP. The OLT rejects the device profile classification.
: True hardware conversion depends entirely on the built-in system-on-chip (SoC). Many older iterations of the HG8245H feature a pure GPON media access control (MAC) layer embedded in the silicon, making a physical conversion to EPON impossible via software alone. firmware huawei hg8245h gpon to epon
The primary difference lies in the transmission protocols and speeds:
Open the HG8245H case (carefully) or log into web interface ( 192.168.100.1 user: root / admin or telecomadmin / admintelecom ) and check:
Verify that the set optic mode command executed successfully and did not revert to GPON. Incompatible firmware version uploaded to the flash sector. If you have confirmed your HG8245H revision supports
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.
: After successful login, type su and press Enter. You may be prompted to use an "SU password calculator" to generate a dynamic code based on a challenge. This code is required to escalate your privileges to the Super User (SU) level.
Do you currently have access to the superuser credentials? What brand and model of OLT is your fiber provider using? Share public link The OLT rejects the device profile classification
Buy an actual EPON ONU (e.g., HG8540M, HG8240E) instead of converting.
# Read current mode i2cget -y 0 0x50 0x7A # Write EPON mode (example value – research required!) i2cset -y 0 0x50 0x7A 0x01
