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Can a 100Mbps router power a 200Mbps fiber optic cable

Fiber and communications infrastructure knowledge brief Published 29 Nov 2023

Prepared for preliminary research by the ALFA PRO knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

A 100Mbps router cannot fully utilize a 200Mbps fiber optic connection because the router's maximum throughput is limited to 100Mbps.

Key Considerations

Router Speed Limitation: A router rated for 100Mbps has a maximum data throughput of 100 megabits per second. Even if your fiber optic service provides 200Mbps, the router will cap the speed at 100Mbps, meaning you will not experience the full potential of your internet connection. Fiber Optic Compatibility: Fiber optic internet itself is not limited by the router type; the fiber cable can carry much higher speeds.

The critical factor is the interface between the fiber service and your router. Typically, fiber terminates at an Optical Network Terminal (ONT), which converts light signals into electrical signals via an Ethernet port. Your router connects to this Ethernet port, so the router's WAN port speed determines the maximum speed you can achieve.

Upgrading Equipment: To fully utilize a 200Mbps fiber connection, you need a router with a WAN port capable of at least 200Mbps, ideally a gigabit (1000Mbps) router to allow future upgrades. Most modern routers support 1Gbps, which is sufficient for current and near-future fiber speeds. Other Factors: Even with a compatible router, internal wiring, Ethernet cable quality (Cat5e or higher), and device capabilities can affect the actual speed experienced.

Cat5e cables support up to 1Gbps over 100 meters, so they are sufficient for a 200Mbps connection.

Conclusion

While your existing 100Mbps router can connect to a 200Mbps fiber optic service, it will limit your internet speed to 100Mbps. To take full advantage of the 200Mbps service, you should upgrade to a router with a higher throughput, preferably a gigabit router, and ensure your Ethernet cables are at least Cat5e or better.

Can a 100Mbps router power a 200Mbps fiber optic cable - ALFA PRO COMMUNICATION SYSTEMS (Pty) Ltd [PDF]

Can a 100Mbps router power a 200Mbps fiber optic cable

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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