In most cases, yes, you can use your existing router with fiber optic internet, provided it has a WAN (Wide Area Network) Ethernet port and your ISP provides a modem/ONT with an Ethernet output. To connect your fiber optic cable to a router, ensure you have the following: Fiber optic modem (ONT): Most fiber connections require an Optical Network Terminal (ONT), provided by your ISP. This comprehensive guide combines industry standards with field-tested practices to ensure you achieve a rock-solid. While the internet connection comes in via fiber optic cable, the device that manages your home network—your router—still needs to be able to communicate with the incoming signal. This communication typically happens through an Ethernet port. As far as I understand, I need a PPPoE username and password to connect. I never received it from Telekom, as well as Access number (Zugangsnummer).
[PDF Version]