ATLANTA, GA. — Earnings by Internet Service Provider EarthLink (Nasdaq: ELNK) plunged more than 60 percent in the second quarter, the company reported Thursday.

Citing increased costs related to its wireless phone joint venture with a South Korean firm, EarthLink said profits declined to $16.6 million, or 12 cents a share. The ISP reported profits of $43.8 million, or 31 cents per share, for the same period a year ago.

Total revenues increased 2 percent to $332.1 million from a year ago.
EarthLink did add 116,000 broadband subscribers, due in part to its acquisition to New Edge Networks. It also added 48,000 PeoplePC Online subscribers. However, EarthLink’s dialup Internet subscriber base dropped by 163,000.

The company had 1.4 million People PC Online, 2 million dialup and 1.8 million broadband subscribers at the end of the quarter.

Dragging down profits included a $13.3 million increase in losses associated with the HELIO wireless joint venture.