I have an old landline phone and would like to use it, but only internally, so that I can, for example, call the landline via my laptop, which is connected to the same router. Is the?
What do you have for a router?
If you only want to use the phone to make calls, there are adapters that connect the phone to the router either by cable or via WLAN. The detour via laptop does not make sense.
There are different adapters for this, depending on the type of connection:
https://www.voipango.de/voip-gateways/analoge-telefon-adapter-ata/
This is possible if the laptop is connected to a VoIP account on the router.
Details can be found in the instructions for the router.
