A SECURITY SYSTEM FOR CONTROLLING THE POWER CIRCUIT OF A MOBILE TELEPHONE

摘要

The invention relates to a security system, in which a current supply circuit (1) is provided with a number of battery cells (2) and mounted in casing (3) for a replacement battery for a mobile telephone (4) in a cellular radio network, the current supply circuit comprising a switching means (6) for a supply voltage for the mobile telephone. According to the invention the current supply circuit is supplemented by a control means (10), which is arranged for locking a turn-on button (8) of the mobile telephone in a depressed position, as well as by signal receiving means (5), which are arranged to control the switching means to turn on the supply voltage in response to an activation signal, so that signal transmission may be provided between the mobile telephone and a supervision terminal (7) in the security system.