I. System Positioning
The building intercom system is the "first electronic doorman" and "visitor security gate" of residential community units. Its core mission isLet residents "know who is coming without meeting them face-to-face" and let visitors "confirm before entering"— Through video calls between the unit entrance host and the indoor extension, visitor identity verification and remote one-touch door opening are realized, upgrading the traditional "press the bell downstairs, open the door upstairs" to "video intercom, see who it is before letting them in." The system effectively prevents strangers from tailgating and illegal entry, making it a standard security facility for smart communities and premium residences.
II. Equipment Composition and Functions
| Equipment | Core Function | Selection Key Points |
|---|---|---|
| Entrance Host | Installed at the unit entrance, the entry point for visitor calls and door unlocking | Supports keypad dialing, password unlocking, IC card / facial recognition door opening; HD camera + night vision fill light, waterproof and anti-vandal panel; can connect to the property management center |
| Indoor Extension | Resident-side answering terminal for video calls and door opening control | 7-inch / 10-inch color touchscreen, supports video intercom, remote door unlocking, one-touch property call, zone alarm linkage; supports linkage with mobile APP |
| Power Supply (Power Box) | System power supply guarantee | Regulated power supply powers the entrance host, indoor extension, and electric lock, supporting backup power during outages and overload protection to ensure stable system operation |
III. Core Functions
Visitor Call and Talk— Visitors press the unit number at the entrance host, the indoor extension immediately rings and displays the real-time image at the entrance, allowing residents to clearly see the visitor's face and surroundings, achieving visual confirmation of "open the door only when you see who it is, not otherwise"
Video Call Door Opening— After confirming the visitor's identity, the resident remotely opens the unit door's electric lock with one touch; supports two-way voice intercom, allowing real-time communication between resident and visitor without going downstairs; the entrance host also records call logs, providing a traceable record of visitor entry and exit
Multiple Door Opening Methods— In addition to remote door opening by residents, the entrance host supports password opening (temporary visitor passwords, resident private passwords), IC card opening, and facial recognition opening, meeting the passage needs of different groups; can be networked with the property center, and visitors are allowed entry after confirmation by property staff
Smart Expansion and Linkage— The indoor extension can link with access control, video surveillance, and zone alarms: forced door prying or illegal unlocking triggers automatic alarms, and call logs are linked with video snapshots; supports linkage with mobile APP and smart home systems, allowing residents to remotely answer and open the door even when away from home
IV. Solution Advantages (Based on Yunzhi Company's Practice)
Leveraging its weak-current intelligent system integration capabilities, Yunzhi Company can provide integrated integration of building intercom systems with access control, video surveillance, smart home, and property management platforms, delivering a smart passage experience of "video intercom + facial recognition door opening + mobile remote door opening + alarm linkage." This has been implemented in projects such as the Zijun Tianxi Smart Digital Community, helping make unit door management in residential communities safer, smarter, and more convenient.