Alaskan telecommunications company General Communication(NASDAQ: GNCMA) reported its second-quarter results after the market close on Aug. 2. Revenue and adjusted EBITDA (earnings before interest, taxes, depreciation and amortization)slumped year over year, driven by long-term roaming and backhaul agreements that promise to reduce the seasonality in the company's results. Here's what investors need to know about General Communication's second-quarter earnings report.