To set up your router for fiber internet quickly, connect the router to your fiber modem, access the router's settings via a web browser, and input the provided ISP credentials. Make sure to update the firmware, configure Wi-Fi security, and customize your network name for. Fiber optic internet delivers blazing-fast speeds and reliable connectivity, making it a top choice for modern homes and businesses. However, setting up a fiber optic connection to your router can seem daunting if you're unfamiliar with the process. With. Many models now have a dedicated 2. 5Gbps or 10Gbps Ethernet port for WAN or LAN connectivity. I never received it from Telekom, as well as Access number (Zugangsnummer).