Wikipedia
Teleblock
TeleBlock is a software program that automatically screens and blocks outbound calls against available federal, state, wireless, third party and in-house Do-Not-Call (DNC) lists. Designed for use in telemarketing and outbound call centers, TeleBlock is applied to a subscriber's telephone carrier provided voice lines or delivered through their predictive dialing and Customer Relationship Management (CRM) software. The system triggers all predetermined outbound calls to query a proprietary customer specific DNC database in real-time.