I am making a small DIY project to operate my wired landline phone (twisted copper cable) using my mobile phone. Use cases:
- Dial number on landline via mobile device.
- Receive incoming landline calls via mobile.
I plan to use RaspberryPi. What device can I use to intercept calls on my wired phone and do two way manipulation? (I assume it will be an analog to digital and vice versa device, similar to a modem.)