This project involves building a Twilio Hard Phone using Raspberry Pi, Asterisk, FreePBX, and the Obihai OBi100 device. The goal is to create a fully functional phone system that can make and receive calls without being connected to a traditional phone network. The process begins with setting up the Raspberry Pi with a custom Linux distribution called RasPBX, which includes Asterisk and FreePBX pre-installed. Next, the user configures the OBi100 device and connects it to the Raspberry Pi, allowing for incoming and outgoing calls to be made through the Twilio platform. The final step involves setting up a Twilio number that can call the new system, completing the setup of a fully functional Twilio Hard Phone.