This Wiki collects information around DECT and how it can be made more accessible to hobbyists and end-users.
There is an Open Hardware Devboard for the SC14CVMDECT module by Renesas/Dialog Semiconductor.
The sources/design files of the board can be found here.
Related git repos are found here:
The SC14CVMDECT hosts a SC14449, a DECT Baseband Processor, 82.944MHz CR16Cplus + Gen2DSP, 16+4kB nonshared/cache + 32kB shared + 1.25kB DIP + 2kB DSP = 55.25kB RAM, 48kB DSP ROM