| 摘要 |
PROBLEM TO BE SOLVED: To provide an alarm connection system, capable of easily installing alarms at low cost. SOLUTION: This system comprises fire sensors 40a-40d detecting abnormality of a monitoring area and giving an alarm, a coaxial cable c for inputting and outputting signal to TV 35a-35d and an announcement broadcast receiver 31, and an input and output part for performing input or output of signal to the fire sensors 40a-40d through the coaxial cable c connected to the fire sensors 40a-40d. As the communication cable, for example, a network cable for transmitting network signal can be used in addition to the coaxial cable. COPYRIGHT: (C)2007,JPO&INPIT
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