Telecom Argentina SA - ADR operates in the Telephone communications, exc. radio sector. Telecom Argentina SA (Telecom) is an Argentina-based company primarily engaged in the provision of national fixed-line telecommunication services, international long-distance service, data transmission and Internet services and mobile telephony. The Company also offers such solutions as online business and Web hosting, virtual private network (VPN), mobile operating systems developed by Microsoft and Blackberry, toll-free telephone numbers, call centers and voice over Internet protocol (VoIP) line, as well as other services mainly aimed at corporate clients. The Company's subsidiaries are structured in two business segments: Fixed Telephony, comprising Telecom Argentina USA Inc and Micro Sistemas Sociedad Anonima, and Mobile Services, including Telecom Personal SA, Nucleo SA and Springville SA. As of December 31, 2010, the Company's majority shareholder was Nortel SA, 54.74% of its interest.