https://preview.redd.it/fv3npzx7351c1.jpg?width=3024&format=pjpg&auto=webp&s=6f10f7e292abc86c0fcec09cd90487330d5c39a3

This is the back of my router. The internet port is an SPF+ ethernet input. I want to get a new router, but the problem is that the only way for it to connect right now is an RJ45 cable, and if I get a new router, the port will be RJ11.

Which cable would I need if I wanted to get a new router that needs RJ11 input but my ADSL has RJ45 output? Do I need to get an RJ45 to RJ11 cable? Or do I need something else?

Thanks.