I use a SIP provider for the landline at home. When on vacation I want to be able to make outbound calls with my landline number. I know this can be done, but I have no idea how. Does anyone here have some pointers for required hardware, software and configuration?
I do this with avm fritz box, it can take the physical line and act as a sip server on the lan. I connect via the integrated wireguard VPN and use portsip app for make phone calls