EN
Application of complex solutions in information systems created a need of provision, within a short time, of data being often created in very distant sources as well as a noad of transmitting data processing results over long distances. At present we do not possess yet a sufficient experience in realization and exploitation of electronic data processing systems combined with data transmission. This article contains an analysis of the data transmission system used in the ZTK "Teofilów". It contains a presentation of the system concept, principles of its operation and technical equipment. A special attention was paid to some limitations which appear in the case of systems based on data transmission.