Finally

Today the FTC (Federal Trade Commission) issued rules banning prerecorded calls from telemarketers.

To receive a prerecorded call from a Telemarketers you must choose to receive these calls. These rules do not block "informational" calls such as those telling you of a canceled flight, appointment reminders.

These calls are not covered by the TSR (Telemarketers Sales Rules) as they do not try to sale any goods or services to the receiver.