A video door phone intercom system allows you to see and speak with visitors at your entrance before opening the door. Wikipedia+2somfy.com.eg+2
It typically includes an outdoor station with camera, microphone, speaker, and a push-button, plus an indoor monitor (or monitors) where you view the visitor and remotely unlock the door. Dahua Technology+1
Modern systems support features like night-vision, remote door unlocking, app or mobile phone integration, and wide‐angle viewing for enhanced security. Hikvision+1
Installation options vary: from basic wired setups to IP or WiFi enabled “smart” versions that let you answer the door via your smartphone. HW Egypt+1
Ideal for homes, apartments, or offices, they improve convenience and safety by giving you full control of your access point from inside or remotely.