A system that provides a means for telecommunications users to obtain priority treatment from telecommunications service providers for the National Security or Emergency Preparedness (NS/EP) telecommunications requirements. Common abbreviation TSP System. Note: The Telecommunications Service Priority (TSP) System replaced the Restoration Priority (RP) system effective September 1990. See also  National Security or Emergency Preparedness telecommunications,  priority,  requirement,  service,  telecommunications,  telecommunications service,  user.