Yes, a regular router can generally be used with a 50Mbps fiber optic connection, provided it has a standard Ethernet WAN port and supports speeds above 50Mbps.

Compatibility Requirements

To use your existing router with fiber internet, it must have a WAN (Wide Area Network) Ethernet port to connect to the Optical Network Terminal (ONT) installed by your ISP . The ONT converts the fiber optic light signals into electrical signals that your router can process. Most modern routers, even older Wi-Fi 4 or Wi-Fi 5 models, can handle speeds well above 50Mbps, so a 50Mbps fiber plan is unlikely to exceed the router's capacity .

Performance Considerations

While a standard router can work, the Wi-Fi standard and internal processing power affect performance. Older routers may limit Wi-Fi speeds or reduce efficiency when multiple devices are connected. For optimal performance, especially with multiple devices, a Wi-Fi 5 or Wi-Fi 6 router is recommended, though for 50Mbps, even older routers are usually sufficient .

Setup Steps

1. Confirm ONT Installation: Ensure your ISP has installed and activated the ONT.
2. Connect Router to ONT: Use an Ethernet cable from the ONT's Ethernet port to your router's WAN port .
3. Configure Router Settings: Enter any ISP-specific settings such as VLAN, PPPoE, or DHCP if required.
4. Test Connection: Verify that your devices achieve the expected 50Mbps speed.

Summary

A regular router with a standard Ethernet WAN port can handle a 50Mbps fiber connection without issues. Upgrading to a newer router is only necessary if you want better Wi-Fi coverage, higher efficiency, or support for multiple devices. For a single household or light usage, your existing router should work fine .