Access control controller for access code-protected remote-enquirable data source e.g. camera, has access code changing unit for temporarily changing access code e.g. binary code, to temporarily lock remote enquiry with access code

摘要

The controller (1) has an access code changing unit (3) for temporarily changing a permissible access code (4a, 4b, 4c) e.g. binary code, to temporarily lock a remote enquiry with the permissible access code. The controller is formed as a separate unit from a data source (2a, 2b, 2c) e.g. camera, where the controller communicates with the data source over a remote data transmission channel. A memory unit stores the permissible access code, where an input is provided for the remote transmission of the permissible access code.