These halogen-free and flame retardant screened installation twisted pairs alarm cables are used for signal, data communications and application for telecomunication as an fixed indoor installations. And also screen provides protection against external electrical interferences. Halogen-free cables are used in the closed environments, at schools, airports, hospitals, malls etc. where low corrosive gases and low smoke density must have in case of fire. These cables are used for indoor applications, not intended for outdoor or underground installation.