The function dials a list of telephone numbers and connects the answered calls with those who make calls, in most cases – agents. “Predictive Dialer” uses statistic algorithms in order to minimize time agents spent not by the phone.
Some telephones, depending on the brand and model, have the intercom function, which allows to begin communication by sending the signal. When the signal comes, the telephone set rings a signal different from the standard ring tone call. After that the telephone temporarily switches off from the telephone line and works as an intercom.