This is the brand name for wireless packet switched data network services based on the Motorola Radio Data Link Access Protocol (RD-LAP) open protocol specification. The DataTAC® system supports over-the-air data communication rates ranging from 4800 bps to 19200 bps. Three variants of the Motorola DataTAC® Wireless Data Network (DataTAC® 4000, 5000, and 6000 networks). Motient Corporation operates a DataTAC network throughout the United States.