Phreedom2600 is a project to develop Freedom Respecting Embedded Devices.
Phreedom stands for Phone freedom and 2600 Hz is the frequency that was used on long-distance telephone lines.
The current prototype of an analog telephone adapter is based on the BeagleBone Black, a USB soundcard from Vikings and some passive components on a stripboard.
The BeagleBone Black is sold on the Phreedom2600 Webshop, under the name Knochenreiter with Debian replaced by Parabola.
Latest parabola images for ARM have been released, they can be downloaded here.