Important question about telecom phone and router?

I have my router connected to the laptop and made the settings of the router via LAN cable. Because the phone did not work properly. And with the telephone numbers waiting there I have deactivated all number.

Now my question was that my optional phone number or did I disable the neighbor's phone

If you disable telephony on the Speedport Router, this will apply to all phones that are routed through the router.

What does your neighbor have to do with your router?

Thank you sorry I ask again but I'm nervous so I've just changed my own settings

because our neighbors have their own telephone and router

Then that does not affect the neighbors. They have apparently your own DSL connection. Any settings you make will only apply to your own network.