| 摘要 |
A method and control arrangement to secure an alarm system in a site to be monitored. The readiness to forward an alarm out of the site is monitored with a control arrangement through which at least data transmission connections of the alarm system to outside the site are repetitively checked to enable sending the alarm via at least one secondary alarm connection in case the primary alarm connection is prevented. The control arrangement includes at least two controlling devices that monitor continuously the electric connection/readiness of the site to at least two of the following:
a data transmission route working on a free frequency,a mobile phone network,an electricity grid,the internet,one or several other controlling devices,a communication connection working on a free frequency,an alarm arrangement belonging to the alarm system,a wired connection. |
| 主权项 |
1. A method to secure an alarm system, which method is meant especially for securing the forwarding of an alarm of an abnormal action or situation in a site, detected by an alarm arrangement, of the alarm system monitoring the site, out of the site from the alarm system, when the alarm system's readiness for forwarding an alarm out of the site is being monitored with a control arrangement belonging thereto, by which at least data transmission connections of the alarm system to outside the site are being repetitively checked in order to enable sending the alarm via one or more secondary alarm connections, in case the primary alarm connection is prevented, wherein the control arrangement comprises at least two separate controlling devices, when each controlling device by its data processing unit, through sensor elements coupled thereto monitors continuously the site's electric connection/readiness to at least two of the following:
a data transmission route working on a free frequency, the like, a mobile phone network, an electricity grid, the internet, one or several other controlling devices, a communication connection working on a free frequency, an alarm arrangement belonging to the alarm system, a wired connection, wherein, when a data processing unit of one or more controlling devices detects a faulty connection/state of one or more sensor elements, the alarm to outside the site is being forwarded by the controlling device through an external data transmission connection that has been ascertained available for its one or more sensor elements. |
