SELEX Communications Ltd and the Brazilian Army (Exército Brasileiro-EB) signed a contract for first phase of the upgrade of SISTAC (SIStema TÁtico de Comunicações do Exército), the tactical communication system in operation since 1998.

SISTAC is a digital integrated multi-service communications network based on a shelter able to supply voice and data services, both encrypted and non-encrypted, and to interface with public telephone network and single-channel radio systems.