This excerpt taken from the TNE 20-F filed Jul 13, 2009.
Network and Facilities
Our network is comprised of a physical and logical infrastructure through which we provide fully integrated services, whether fixed-line or mobile, voice, data or image, thereby optimizing available resources.
Telemar and Oi monitor their networks remotely from our centralized national network operations center in Rio de Janeiro. Brasil Telecom monitors its networks remotely from its centralized national network operations center in Florianópolis. Network operating and configuration platforms, located at the network operations centers, perform failure monitoring, database and configuration management, security management and performance analysis for the each network.