The document discusses the OP^2 project, which aims to develop an open source framework for building SIP hardware devices using the Raspberry Pi. The framework is based on the SIP SIMPLE SDK and includes a web interface for configuration, REST API, and plugins for hardware control. An early prototype called Falcon was demonstrated, and future plans include improving audio quality, provisioning via Bonjour, and adding support for contact management, Power over Ethernet, and other hardware platforms. The project site is http://op2-project.github.io.