The TAPI driver and the CTI client from Phonalisa come with a simple installer and an update tool. You need at least Windows 7 (or newer) as 32 or 64Bit version.
With the download you accept the Phonalisa License Agreement. The copyright of this software is owned by Phonalisa Europe GmbH. The software partly uses components from OpenSource projects, these are also part of the license agreement . You can download the source code of the OpenSource components here.