A dialer is an electronic device that is used to monitor the numbers dialed from a telephone, and alter them to provide services that would otherwise require long international and national access codes. It is typically connected to a telephone line. The telephone numbers are inserted and modified automatically by the dialer depending on the country, the time of the day, or the area code dialed.
For instance, a dialer could be programmed to use the service of one service provider for cellular calls, and another for international calls. Most of the contact center software are integrated with a dialer which is a computer program. There are a number of dialing modes, and these are programmed in a contact center depending on how the call is placed.