C‑Data FD511G‑X‑F680 is a Single-Port XPON ONU (Optical Network Unit) used in fiber-optic internet (FTTH) networks. It converts the fiber signal from an ISP into Ethernet so that a router or computer can access the internet.

Basic Information

• Product Type: XPON / EPON / GPON ONU

• Brand: C-Data

• Model: FD511G-X-F680

• Use: Home, office, or ISP fiber-to-the-home internet connection.
  
  

Key Features

• Dual-Mode Access: Supports EPON and XPON (GPON) with automatic switching depending on the network OLT.

• High-Speed Fiber Connectivity:

  • GPON downstream: 2.5 Gbps

  • GPON upstream: 1.25 Gbps

• Gigabit Ethernet Port:

  • 1 × 10/100/1000 Mbps RJ45 LAN port for wired internet connection.

• Plug-and-Play Installation: Automatically detects the ISP’s network mode.

• Remote Management: Supports ONU auto-discovery, link detection, and remote firmware upgrade.
  
  

Hardware Specifications

• Optical Port: 1 × SC/UPC fiber port

• Receiving Sensitivity:

  • XPON: −28 dBm

  • EPON: −27 dBm

• Power Supply: 12V / 0.5A adapter

• Power Consumption: < 3W

• LED Indicators: Power, PON, LOS, LAN

• Operating Temperature: 0°C to 50°C
  
  

Compatibility

Works with many OLT brands such as:

• Huawei

• ZTE

• BDCOM

• VSOL

This makes it suitable for most ISP fiber networks.

Typical Network Setup

Fiber Cable → ONU (FD511G-X-F680) → Router → WiFi / Computer