| 摘要 |
PURPOSE: A communication construction system for a security alarm system is provided to communicate a management computer and a master main device with a private or a public line and communicate the master main device and a slave main device, thereby reducing the use cost of the private line and capable of maximizing the subscriber's capacity. CONSTITUTION: A master main device(210) receives all alarm situations generated to subscribers of each channel and reports the situations to a decoder(205) through a public line or a private line. A plurality of slave main devices(215) are connected to the master main device(210) by wireless and reports all alarm situations to the master main device(210). A plurality of local device(220) are connected to the master main device(210) and the slave main devices(215) by line and reports the alarm situations generated to subscribers to the master main device(210) and plural slave main device(215). A printer(230) is connected to the master main device(210), the slave main device(215) and the local devices(220), and outputs the contents relating to security. Plural zone extenders(235) extends the number of connection of sensors. Plural approximating type card reader(240) is connected to the plural zone extender(235), the master main device(210), the slave main device(225) and a local device(220).
|
