That router has an optical module

Routers with optical modules enable direct fiber optic connectivity, converting light signals into data for high-speed internet access.

How Optical Module Routers Work

Routers with optical modules, often called fiber-ready routers, can connect directly to fiber optic networks. They typically include an integrated Optical Network Terminal (ONT) or support pluggable optical transceivers. The ONT converts the incoming fiber light signals into electronic data, which the router then distributes to devices via Ethernet or Wi-Fi . Some routers allow the use of modular port adapters (MPAs) that support QSFP28, QSFP-DD, or SFP+ optical transceivers, enabling high-capacity connections for enterprise networks .

Home Fiber Routers

For residential use, routers like the FRITZ!Box 5690 XGS support XGS-PON fiber connections and can deliver speeds up to 10 Gbit/s. They also feature Wi-Fi 7, backward compatibility with Wi-Fi 5 and 6, and mesh networking capabilities for seamless coverage throughout the home . These routers can either connect directly to the fiber line or via a separate ONT provided by the ISP.

Enterprise-Grade Optical Routers

In enterprise or carrier networks, routers such as the Cisco ASR 9000 Series or NCS-55A2 modular routers use high-capacity pluggable optical modules like ZR/ZR+ coherent optics. These modules allow routers to connect over DWDM or dark fiber networks, supporting extremely high data rates while reducing cabling and power requirements . Modular port adapters can support multiple 100G or 400G transceivers simultaneously, providing flexibility for scaling network capacity.

Key Considerations

• Compatibility: Ensure the router supports the fiber standard used by your ISP (e.g., XGS-PON, GPON, or AON).
• Speed Requirements: Choose a router that can handle the maximum bandwidth of your fiber connection.
• Wi-Fi Standards: For home use, Wi-Fi 6 or 7 ensures optimal wireless performance.
• Modularity: Enterprise routers benefit from modular optical ports for future scalability.
• Integrated ONT: Some home routers include an ONT, simplifying setup without needing a separate device . Routers with optical modules provide a direct, high-speed interface to fiber networks, whether for home or enterprise, combining signal conversion, routing, and high-capacity data distribution in a single device.