There are several types of auto dialers, including preview dialers, progressive dialers, and predictive dialers. Preview dialers are the most basic level of auto dialing. They allow you to view the customer record first before calling and then you can decide if the number should be called. Progressive dialers will wait for an agent to finish their call before dialing the next number on the list. A special feature of progressive dialers is they will show up as a local phone number to the prospect they are calling (the area code matches the area code of the prospective customer).
The final type of auto dialer is the predictive dialer, one of the most popular types of auto dialing systems.