The telecom giant AT&T has agreed to buy satellite television operator DirecTV in a $48.5 billion deal. It is the second major media takeover this year following the merger of Comcast and Time Warner, which remains up for federal approval. In a statement, the media reform group Free Press said the AT&T-DirectTV deal would hurt consumers and stifle competition, calling it a result “of more than a decade of shortsighted FCC policies that have encouraged consolidation over competition.”