Sergio Yañez Astete

Compañía Nacional de Teléfonos Telefónica del Sur SA provides telecommunication services. Its products include internet data and connection, digital television, and mobile services. The firm operates through Fixed Telecommunications, and Others segment. The Fixed Telecommunications segments includes fixed telephony services, connections and line installations, data network services, Internet access, television, and value added services. The Other segment offers marketing of long distance national and international services, mobile, and integrated security services, such as security cameras and access control. The company was founded on April 29, 1893 and is headquartered in Valdivia, Chile.