Automated calls are made from an auto dialer system. The auto dialer system can be a specific hardware equipment or just your computer. To turn your computer into an autodialer system, a voice modem is needed to play your audio messages over the telephone line. The automated calls also can be setup such that they can be transferred to live agents.
Automated telephone calls are used widely in political campaigns, sales and marketing communications, lead generations, service reminders, and event notifications.