Telecom company faces massive lawsuit over illegal robocalls.

Avid Telecom, an Arizona-based phone-calling service provider, is being sued by attorneys general from 48 states and the District of Columbia for allegedly facilitating billions of robocalls, including many that appeared to be scams. The company is accused of transmitting 7.5 billion automated calls to people on the National Do Not Call Registry, a practice that violates laws prohibiting deceptive telemarketing practices. The lawsuit represents the latest effort to crack down on automated phone scams.