Supply of building doors/community entrance doors, security door installation/Hefei intercom door manufacturer direct sales

The building door is a door made of stainless steel plates. It is generally used at the entrance of a community. The door leaf is usually equipped with a building intercom.
The main function of the building door is to prevent theft. Generally, an intercom is installed on the building door to facilitate visitors to call the owner and confirm their identity before entering the residential area.
For aesthetics, anti-theft, etc., building doors are generally made of stainless steel, that is, stainless steel building doors.
Door types generally include: double-joint, double-opening, multi-opening, etc.
Floor[] Yumen's working process is as follows: install a management host in the security room at the entrance and exit of the community, install anti-theft doors and intercom hosts at the entrances of each unit, and install user extensions in the residents' rooms. When a visitor enters the community, the security personnel communicate with the resident through the management host. After confirming the identity of the visitor, the community access control system is turned on, and the visitor can enter the community. The visitor calls the resident through the intercom host at the door of the unit. After the resident agrees, the electronically controlled door lock of the unit is opened, and the visitor can enter the building.
Building Doors The principle of building doors? Each door switch corresponds to a resident's extension. It is actually a power supply switch. When the switch is pressed, the power supply to the resident's home is connected. When the extension is powered on, the music in the extension will sound. After the extension goes off-hook, the hook switch switches the power to the amplified line part, and intercom can be carried out. Therefore, this kind of doorbell has six wires entering the house. Except for one ringing, the others are all connected in parallel. Do not believe? When someone else is talking to someone else, you can pick up the phone and listen, and you can still hear the conversation.