To provide the islands with the best means to deal with security problems or emergencies in the best possible way, by considering them as an element of territorial cohesion, the safety of people and the environment at present. The aim is to implement digital mobile communications systems for security and emergency services by means of technology that ensures the secrecy of communication along with high operability, providing users with a set of additional services that facilitate their daily work. Supply, installation and integral maintenance: expansion and evolution of a Digital Mobile Communications Network for the Security and Emergency Services of the Government of the Canary Islands. Physical infrastructure of the RESCAN Network sites, Power systems, security systems, Radio equipment, mobile communications units, Base microstations (MBS), coverage expanders.