| Problem | Likely Fix | |--------|-------------| | command not found | Firmware too new/old. Find R016 unlocked. | | Switches back to GPON after reboot | Run set upport permanent 1 before saving. | | No PON sync | Your OLT is 1000BASE-PX20 vs. PX10? Try set optical txpower high . | | Bricked / boot loop | You need TTL serial (pins J3 on board) + load pack via TFTP in U-Boot. |
. While there are third-party methods to switch the operating mode, doing so incorrectly can permanently "brick" the hardware due to fundamental differences in how the two standards handle data. Critical Risks and Official Stance Hardware Incompatibility firmware huawei hg8245h gpon to epon