Extek designs, manufactures & markets special heavy duty telephones for use on roads, railways, metros, ships, factories, chemical plants, refineries, power plants etc.. Extek can provide phones with handsets or headsets or handsfree which can resist weather or water or dirt or chemicals or vandalism or explosive gases & liquids etc.. Extek supplies both analog POTS and VoIP (Arnesys) versions of its phones and supplies them to a worldwide market.Extek and Arnesys supplies phones with brand names such as Tuftel, Haztel, Arnystel etc.. In addition, Extek sells parts, spare parts and accessories for its own and others heavy duty telephones & intercoms.