Huawei Huawei HG8145C GPON ONT HG8145C GPON to XPON means changing the device firmware/config so it can work as a more universal XPON ONU/ONT (supporting GPON and sometimes EPON depending on hardware/firmware).

Full Detail Guide

First Important Truth

Not every HG8145C can become XPON.

Conversion depends on:

1. Chipset / Hardware board

2. Bootloader support

3. Flash memory size

4. Compatible XPON firmware availability

5. Optical module compatibility

Some units convert successfully, some only boot, some brick.

What Is GPON vs XPON?

• GPON = Works on GPON fiber networks

• EPON = Works on EPON fiber networks

• XPON = Auto/dual support for GPON + EPON (usually generic ONUs)

HG8145C Usually Uses Huawei Locked Firmware

Huawei stock firmware often:

• GPON only

• ISP locked

• Vendor locked

• Limited telnet/ssh access

So users try to flash generic XPON firmware.

What You Need

Hardware:

• PC/Laptop

• LAN cable

• Screwdriver

• USB to TTL adapter (UART) for recovery

• Stable power supply

Software:

• Firmware flasher

• Serial terminal (PuTTY / Tera Term)

• Correct XPON firmware

• Backup tool

Full Process

Step 1: Identify Exact Board Version

Check sticker / PCB:

• HG8145C V1 / V2 / V3

• CPU / chipset markings

• Flash chip size

This is critical.

Step 2: Backup Original Firmware

Before doing anything:

• Bootloader dump

• Full flash backup

• MAC address

• Serial number

• GPON credentials

Without backup, recovery gets harder.

Step 3: Access Bootloader

Usually via UART pins on PCB:

• TX

• RX

• GND

Connect USB TTL at proper voltage (usually 3.3V).

Then interrupt boot process.

Step 4: Flash Compatible XPON Firmware

Methods:

A. Web Recovery Mode

Upload .bin

B. TFTP Method

Bootloader downloads firmware

C. UART + Bootloader Commands

Direct write to flash

Step 5: Reboot and Configure

After successful flash:

• Login to web panel

• Set WAN mode

• Configure GPON/EPON

• Clone SN / LOID / Password if needed

Risks

Major Risks:

• Brick device

• No optical signal

• Serial/MAC lost

• Wi-Fi not working

• LAN ports mismatch

• Overheating / unstable boot

Important Reality

Huawei branded ONTs often have custom chipsets/drivers. Even if firmware boots:

• Optical may fail

• Wi-Fi may fail

• Voice port may fail

• LEDs may behave wrong

Better Option

Instead of converting HG8145C, often easier to buy native XPON ONU device.

If You Want Exact Method for YOUR Unit

Send me:

1. Front + back sticker photo

2. PCB motherboard photo

3. Current firmware version

4. Bootloader screen (UART log)

Then I can tell you if your HG8145C is convertible or not, and safest method.