Calidad y niveles de Servicio / Sistema de Gestin de Calidad de los Servicios ISO 20000-1:2015
We own and operate a fixed-line telecommunications system in Mexico, where we are the only nationwide provider of fixed-line telephony services. We also provide other telecommunications and telecommunications-related services such as corporate networks, Internet access services, information network management, telephone and computer equipment sales, and interconnection services to other carriers. FORM 20-F, Period of Report: 2007-12-31