This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.
The transmission of the alarm of an alarm system takes place z. B. via the local telephone network , via your own private connections, e.g. B. the telecontrol network of the major operators in the energy industry ( power plants ) and via specially leased and constantly monitored by the receiving device post office leased lines, z. B. to security and protection services or the police .