Impsat Corp. (Buenos Aires) selected Newbridge Networks (Kanata, ON, Canada) for the expansion and upgrade of its national data network in Colombia and Teledatos, Colombia`s national backbone network. Impsat will deploy Newbridge MainStreet TDMs. Impsat plans to invest $3 billion over the next five years in its Latin American operations. The Teledatos network provides voice and data services to Colombia`s financial and health sectors.