Device for machine communication in data transmission

摘要: For automated communication in a limited acquisition space, for example order to identify or check an access authorization, use is made of active data supports which comprise transmitter (15), receiver (16), read-write memory, electric clock, computer, display and power source (7). The checking station also provided with transmitter-receiver possibly modify the data. Each has maximum extent less than minimum space. In this way it not necessary plug support, precise point must, however, be deliberately brought close station. definite coordination between further support prevented.