I have a fiber internet router 4 yellow network sockets! Got 3 left! Just & plug the little box in? I have Telenor! You don't have to open up a simple subscription with them or something??
You need an SIP trunking service provider and you configure by pressing ***02 on your analog phone to learn your IP address, type it into your web browser, and configure your FXS port with the SIP details.