| 摘要 |
<p>The invention relates to a remote control system comprising one or more controls (1) communicating with one or more central receiver units (2, 3, 4) that control the opening/closing of given doors or accesses. Each control (1) has a single push button (5), wherein said control (1) can control or be controlled with respect to any given number of central units (2, 3, 4) according to pre-established modes depending on the number and duration of pulses and/or the distance between the control (1) and the central units (2, 3, 4). Communication between controls (1) and central units (2, 3, 4) is two-way and includes a secret code by means of an algorithm (RPDA) specifically developed for said system and consisting of a previously coded preamble heading all messages within the communication and requiring a satisfactory response at the end of the message flow.</p> |
