| 摘要 |
PROBLEM TO BE SOLVED: To provide an interphone system capable of automatically controlling an electric lock upon an occurrence of fire and increasing user friendliness and security.SOLUTION: Upon detecting fire, a fire sensor 4 transmits a fire detection signal. Receiving the fire detection signal, a master unit control section 10 of a master unit 1 controls an electric lock control unit 8 to transmit an unlocking instruction signal which includes an unlocking instruction command to unlock an electric lock 7 through an antenna 18. Receiving the unlocking instruction signal transmitted from the master unit 1, a control section 80 the electric lock control unit 8 transmits a control signal to the electric lock 7 through a control line Lc. Receiving the control signal, the electric lock 7 unlocks the electric lock. When the fire sensor 4 detects fire, since the electric lock 7 in a house H unlocks the electric lock, unlocking operation by a resident is not required; thus, user friendliness and security are enhanced. |
