Marketing consumer products over the phone is called telemarketing. A recent study indicated that products and services sold via telemarketing amount to hundreds of billions of dollar each year. Political bodies, charity organizations, and various other organizations to raise funds and invite donations also use telemarketing. Public opinion polls are also conducted with the help of telemarketing.

Telemarketing involves the use of persons trained in conversational skills and automatic dialer software and equipments. Telephonic surveys usually make use of a script that derives only a small range of responses. A telemarketing firm maintains a list of prospective customers. The list is prepared based on information such as the customer