Mexicos telecommunications regulator has found that Carlos Slims fixed-line telephone company, Telmex, and pay-television provider Dish Mexico have undisclosed economic links that might breach anti-trust rules, newspaper El Financiero said on Monday. Slim dominates Mexicos phone and Internet markets through Telmex parent America Movil, but the terms of Telmexs concession prevent the company from offering TV. If regulator Federal Telecommunications Institute (IFT) found that Telmex breached its concession, it could impose a fine on the company.