Deploy a Video Intercom System

Digital video door entry intercom systems combined with smartphones can leverage regular SIP VoIP technology to offer a new set of services to end-users: get a notification when visitors press the door bell, see them on video, interact with them via voice and video, at home or anywhere else via wifi or 3G coverage. This document describes how Linphone and Flexisip can be used together to build a SIP network dedicated to home automation and surveillance.

The document presents a digital video door entry system combined with mobile devices, allowing users to receive notifications when a visitor presses the doorbell, see the visitor via video, and interact with them through voice and video, both at home and remotely via Wi-Fi or mobile network. It describes how Linhome, liblinphone SDK, and Flexisip can be used together to build a SIP network dedicated to home automation and surveillance.

Solution Architecture:

Digital video door entry systems use SIP (RFC 3261) and RTP (RFC 3550) technology to transmit audio and video from an entry intercom to an in-house control panel or mobile devices, whether connected via a local network or public Internet. Integration with Flexisip, an open-source SIP proxy server, handles the routing of video calls between devices.

Solution Components:

1. Mobile App: The app allows users to receive video call notifications, answer, and communicate with visitors via audio and video, as well as control devices such as lights or the door. The app uses push notifications to ensure responsiveness even in the background.
2. Entry Video Phone: These devices send audio/video streams when the doorbell button is pressed, enabling two-way communication via SIP.
3. In-House SIP Proxy and Flexisip: The in-house SIP proxy manages incoming calls and routes them to connected devices, such as mobile apps or control panels. Flexisip ensures connectivity with devices outside the local network via a cloud-based SIP proxy server.

Use Cases:

• Answering a video call on a mobile phone or in-house control panel from the entry video phone.
• Video surveillance at any time through the mobile app by calling the entry intercom.
• Using Flexisip to manage SIP connections over the Internet, ensuring users are reachable even outside the home network.

Conclusion:

Linhome, liblinphone, and Flexisip provide an ideal solution for digital intercom systems, offering seamless and secure audio/video communication between users both inside and outside the home. This architecture can be customized to meet specific customer needs.