Among the solutions proposed by Zenitel the greatest interest at the market of the Russian Federation is presented today by the systems of informing and the notification, duplex and loudspeaker communication under the Stentofon trademark. Essential advantage of this equipment is the possibility of its use in the conditions of industrial production, including in an aggressive environment - at the increased noise levels, vibration, a zapyleniye and the other complicated working conditions. Solutions are scalable and can work regardless of external channels, are easily integrated into the existing infrastructure and are compatible to all modern solutions of other producers as a part of the complete solutions including adjacent functional elements.