Mexico rules Telmex dominant in completing calls

MEXICO CITY, Oct 26 (Reuters) - Mexico's competition regulator said on Monday it ruled that telephone giant Telmex, controlled by billionaire Carlos Slim, is a dominant player in completing phone calls.

Telmex (TELMEXL.MX) (TMX.N), a former government monopoly, controls about 80 percent of Mexico's fixed-line telephone market and is the country's main Internet service provider.

Formally declaring Telmex dominant opens it to the possibility of increased regulation.

The ruling announced on Monday follows other similar decisions.

Earlier in October, the regulator ruled Telmex is dominant in wholesale services related to long distance. And in June it ruled Telmex is dominant in local transit and wholesale leasing of dedicating connections. (Reporting by Tomas Sarmiento; Editing by Derek Caney)