Used in fixed applications, switch board or subscriber systems. Depending on the applications need, PVC or HFFR outer sheathed, with bare or tinned copper conductor, screened or unscreened types are available. HFFR versions are less flammable in case of fire, mostly self extinguishing, have low smoke density and they do not emit poisonous and corrosive gasses during fire. Fire alarm cables are used in internal and external places such as schools, hospitals, meeting rooms and shopping centers where safety regulations must be taken into consideration against fire. These cables can be preferred in communication, ventilation, lighting and voice announce systems of emergency exit ways, equipments and devices. Screened types protect the signal from electromagnetic interference and provide continuity in signal quality.