How to Use the XGSPON ONU Stick SFP+

Fiber-to-the-Home (FTTH) technology is revolutionizing internet connectivity. However, the closed devices provided by internet service providers often restrict users’ freedom. If you have a router or switch with an SFP+ interface, such as the Ubiquiti Dream Machine Pro, Mikrotik CCR series, or an OPNsense device, the XGSPON ONU Stick SFP+ can help you bypass these limitations and connect directly to the fiber-optic network using your hardware. This article provides a comprehensive guide, covering everything from hardware preparation to detailed configuration and troubleshooting, helping you unlock the full potential of fiber-optic technology.

What is the XGSPON ONU Stick SFP+?

The XGSPON ONU Stick SFP+ is a compact Optical Network Unit (ONU) designed in an SFP+ (Small Form-factor Pluggable Plus) form factor, supporting speeds of up to 10Gbps. It integrates the reception and conversion of fiber-optic signals, translating XGSPON or XGS-PON protocol signals into Ethernet output, which can then be directly connected to your router or switch.

Unlike traditional ONUs, this module requires no additional power or Ethernet cable; it works by simply plugging into the SFP+ port of the device. Built on the XGS-PON standard (ITU-T G.9807.1), it provides symmetrical 10Gbps upstream and downstream rates, making it ideal for high-bandwidth activities like 4K/8K video streaming, cloud gaming, or enterprise networking.

Why Choose the XGSPON ONU Stick?

• High Performance: Supports symmetrical 10Gbps speeds, far exceeding GPON technology (2.5Gbps down / 1.25Gbps up).
• Flexibility: Enables advanced functions like custom firewalls, traffic shaping, or multi-WAN load balancing when paired with your router.
• Efficiency: Eliminates the need for standalone ONU devices, reducing cables and power consumption (typically around 3W).
• DIY Enthusiasm: Appeals to network enthusiasts who enjoy pushing the boundaries of fiber-optic technology.

Preparations Before Use

Before getting started, ensure you have the following items and information:

Hardware:

• XGSPON ONU Stick SFP+ Module: Popular models include the XGSPON-ONU-STICK (based on MaxLinear PRX126 chipset), available from platforms like FibreMall or Amazon, priced between $160–300 USD.
• SFP+ Compatible Device: Examples include the Ubiquiti UDM-Pro, Mikrotik CCR2004-1G-12S+2XS, or a PC with an SFP+ port (which may require a network card).
• Fiber-Optic Cable: A single-mode fiber cable with an SC/APC connector (usually provided by your ISP, with length depending on the splitter location).
• Computer: For configuring the module, preferably with an Ethernet interface.

Network Parameters:

• PON Serial Number (SN): A 12–16 alphanumeric code to identify your ONU.
• Logical ID (LOID) and Password: Used by some ISPs (e.g., China Telecom); these can be extracted from your original device.
• VLAN ID: For instance, Virgin Media uses VLAN 0, while AT&T uses VLAN 100.
• Authentication Method: PPPoE, DHCP, or Static IP, depending on your ISP.

Tools & Software:

• Ethernet Cable: To connect your computer to the router.
• Browser: To access the module’s management interface.
• Firmware: While factory firmware might have limitations, the 8311 community firmware is recommended for additional features.

Detailed Steps for Using the XGSPON ONU Stick SFP+

The following guide uses the XGSPON-ONU-STICK as an example, assuming you have already acquired the module and set up a fiber-optic environment.

1. Hardware Connection

• Insert the Module: Plug the XGSPON ONU Stick into the SFP+ port of your router, ensuring it is firmly inserted. Note that some devices, such as Mikrotik routers, may require a reboot after the module is installed to be recognized.
• Connect the Fiber: Insert one end of the SC/APC fiber-optic cable into the module and connect the other end to the ISP’s fiber splitter (ODP or fiber distribution box). Ensure the fiber remains clean and avoid excessive bending.
• Check the LED Indicator: The module typically has an LED light. A steady green light indicates normal operation, while blinking or no light may signal a problem with the connection.

2. Access and Initial Configuration

• Set the Computer’s IP Address:

Open the network settings and configure the IP address to 192.168.11.100, with a subnet mask of 255.255.255.0, and leave the gateway blank.

The module’s default IP address is usually 192.168.11.1.

• Log In to the Management Interface:

Enter http://192.168.11.1 into a browser.

Use the default username and password to log in (commonly root/root, admin/admin, or root with a blank password; refer to the module manual for specifics).

• Check Status:

Navigate to “PON Status” or “Optical Info” to verify the optical signal strength. The Rx Power should range from -27dBm to -8dBm, and the Tx Power should be approximately 0-5dBm.

3. Input Network Parameters

• PON Configuration:

Enter the PON Serial Number (SN) under “PON Configuration” or “WAN Settings.”

If required, input the Logical ID (LOID) and password into the respective fields.

• VLAN Settings:

If a specific VLAN (e.g., 100) is required by your ISP, enable VLAN mode and input the ID.

For modules supporting “Transparent Mode,” VLAN configuration may be skipped.

• Save and Reboot:

Click “Apply” or “Save,” then reboot the module (this may take 1–2 minutes).

After rebooting, check the “Registration Status.” A “Registered” status confirms successful synchronization with the OLT.

4. Router Configuration

• Set the WAN Port:

Log in to your router interface and assign the SFP+ port as the WAN port (e.g., sfp-sfpplus1 for Mikrotik devices).

• WAN Connection Type:

For PPPoE, enter the ISP-provided username and password.

For DHCP, configure the router to automatically obtain an IP.

For static IP, manually input the IP address, gateway, and DNS.

• VLAN Settings:

If the module does not handle VLAN, configure it within the router (e.g., interface vlan 100).

• Test the Connection:

After saving the settings, verify that the router has obtained a public IP address and can ping external addresses (e.g., 8.8.8.8).

5. Optimization and Monitoring

• Optimize Signal:

Log in to the module to check optical power levels. If the Rx Power is below -27dBm, inspect the fiber connection or splitter.

• Manage Heat:

The module may reach temperatures of 50–70°C during operation. Place it in a well-ventilated area or attach a heatsink with thermal adhesive.

• Upgrade Firmware:

If the factory firmware is incompatible, install the 8311 community firmware (via TFTP or web upload; see pon.wiki for tutorials).

• Inspect Logs:

Check module logs to ensure no frequent disconnections or error messages.

Troubleshooting

• OLT Registration Failure:

Verify the SN, LOID, and password.

Ensure the fiber signal is normal (use a power meter to test the splitter output).

Consider upgrading the firmware.

• Router Does Not Recognize the Module:

Update the router firmware or manually enable SFP+ support (e.g., use the Mikrotik command: interface ethernet set sfp-sfpplus1 auto-negotiation=no speed=10Gbps).

• Slow Speed:

Check that the SFP+ port is locked at 10Gbps.

Confirm that the ISP-provided bandwidth meets the 10Gbps standard.

• Overheating:

Add a heatsink or lower the ambient temperature.

Technical Background & Advanced Tips

• XGS-PON protocol: Uses Wavelength Division Multiplexing (WDM)—1577nm downstream, 1270nm upstream.
• Firmware options: The 8311 community firmware adds support for Nokia, Huawei OLTs, and fixes issues like RX_LOS errors.
• Parameter extraction: Use a serial tool (e.g., PuTTY) to extract SN from old ONUs or analyze authentication via Wireshark.

​Important Notes

• Risks: Firmware flashing may brick the module—back up original firmware and proceed cautiously.
• Purchase advice: Buy from reputable sellers to avoid counterfeit products.

​Conclusion

The XGS-PON ONU Stick SFP+ is a powerful, compact solution to take control of your fiber connection. While setup requires technical know-how, this guide should help you master it. For non-technical users, FibreMall offers pre-flashed 8311 firmware versions for plug-and-play simplicity.

Whether chasing peak performance or embracing DIY networking, this tool is worth exploring.

Questions or experiences to share? Leave a comment below! Let’s unlock the limitless potential of fiber together.