From PBX Software:
WinTariff, it is a program to collect and process information about telephone calls. The program receives data from the office PBX about date/time of the phone call, duration, dialed number. WinTariff stores data to the hard disk of the computer and uses it later in course of the processing. Based on duration and dialed number, WinTariff calculates cost of the call and determines the direction.