FIELD: used with a body conducting impact actions. SUBSTANCE: system has a data transmission device provided with a reciprocating impact head for transmission of coded series of discrete mechanical impact conducting body, and a data receiving device provided with a transducer sensitive to impacts on the second surface of the body conducting impact actions heat is essentially opposite its first surface. The transducer is designed for perception of vibrations originated by a series of impacts. The data transmission system well does for realization of the control of access, for example, for opening of slit locks, for opening of bank safes, for getting access to computerized communication and control nets. In these cases the data transmission system functions as a key with an electronic control, usually tapping off a single coed series of impacts, in particular, the key combination of access. EFFECT: enhanced efficiency of data transmission. 28 cl, 13 dwg
