The audio door telephone controller device is connected to the telephone extension at the door. When the door needs to be opened, the visitor dials the telephone in the room on the door operator. After confirming the identity of the visitor through the telephone, the internal staff can enter the password on the telephone to open the door remotely.

The audio door telephone controller device solves the problem of security control for residents and visitors entering the door. Its biggest feature is to integrate the access control system with the telephone network, and use the ordinary household telephone or mobile phone as the visitor identification terminal.

The audio door telephone extension is a kind of intercom, which is generally used to talk to the host computer. However, the current Huhutong building intercom system is combined with the host computer to form an internal telephone system that can complete the telephone contact of individual users in the system. It is divided into visual extension and non-visual extension. It has the electric lock control function and monitoring function, and is generally installed at the door of the user's home, which is mainly convenient for the residents to talk with the visitors.

The main function of UPS power supply is to keep the building intercom system from power failure. Under normal conditions, it is in the state of charging. When the power is cut off, the UPS power supply is in the state of supplying power to the system. At present, the manufacturer of the building intercom system is generally different from the UPS battery. The main reason is that the power consumption of the visual system is too large, and the general small-capacity UPS battery can not guarantee the use time!

The main function of UPS power supply is to keep the building intercom system from power failure. Under normal conditions, it is in the state of charging. When the power is cut off, the UPS power supply is in the state of supplying power to the system. At present, the manufacturer of the building intercom system is generally different from the UPS battery. The main reason is that the power consumption of the visual system is too large, and the general small-capacity UPS battery can not guarantee the use time!