| 摘要 |
In a radio signalling system for the security personnel of security services, works protection and so forth, it is provided to arrange at the respective site control points (I, II, III ...) housings which are equipped with certain coding plates (6) which, brought into contact with the mobile handset (1) of the respective guard, automatically wirelessly send out a certain control signal (S) to the supervision centre (Z). This control signal (S) is triggered by plugging a multi-pin connector (4) into the connector socket (7) of the relevant coding plate (6). <IMAGE>
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