Client only version for network installations. Pro version was created for Siemens Hipath/Hicom PBX telephone switch systems, so by the use of CTI, it allows direct dialing from the program. Network version can be installed to multiple computers, where every user can keep track of calls for own extension number. Basic package comes together with a service program that collects call information from the Siemens Hipath PBX. Motto: Program, that pays out itself!