Client and server VoIP software for intercoms

Solutions

We provide manufacturers, integrators, and developers of IP door entry systems and access control solutions with high-quality client and server SIP-based software and advanced consultancy services.

IP-based home automation systems 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 before opening the door, and interact with them via voice and video, at home or anywhere else via Wi-Fi or 3G/4G coverage.

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Our VoIP software solutions can be used for a wide range of door entry use cases: from simple scenarios, such as peer-to-peer voice communication through a local network, to complex architectures with several devices located inside and outside of the home network.

Simple use case

Simple use case

Peer-to-peer audio/video calls, directed to a single device located inside of the house (via local Wi-Fi or LAN)

Hardware architecture:

  • A door entry device, such as an intercom or a door entry camera, that is able to capture video and capture/playback audio
  • A display device located inside of the local network, such as an indoor panel, that is able to display video and capture/playback audio

Software solution:

A Liblinphone-based SIP/RTP user-agent is embedded into the door entry device and the called display device.

Simple use case with one device
Local use case with multiple devices

Multi-device use case

Audio/video calls are forked from the door entry device to several devices located inside of the house (via local Wi-Fi or LAN).

Hardware architecture:

  • A door entry camera, able to capture video and capture/playback audio
  • Several devices located inside of the house and connected to the local network, able to display video and capture/playback audio. For example, the call can be directed to an indoor panel AND to the user’s smartphone or tablet when the user is at home.

Software solution:

  • A Liblinphone-based SIP/RTP user-agent is embedded into the door entry device and the called display device
  • Flexisip proxy is embedded locally inside of the door entry device and is routing calls to the different called devices
Local use case with multiple devices
Remote access use case

Remote access use case

Audio/video calls are relayed to the user’s smartphone, even when the user is not at home (via 3G/4G)

Hardware architecture:

  • A door entry device able to capture video and capture/playback audio
  • The user’s smartphone
  • Optionally, devices located inside of the house
  • A bare-metal or virtual server machine, located remotely

Software solution:

  • A Liblinphone-based SIP/RTP user-agent is embedded into the door entry device and the called display device
  • Flexisip proxy is embedded locally inside of the door entry device and is routing calls to the different devices
  • Flexisip proxy is configured on a remote server machine, and requests push notifications from Apple’s and Google’s push notification systems. VoIP push notifications wake up the Linhome-based application, when a call is received while the app is off or running in the phone’s background.
Remote access use case

Advantages of the solution

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Scalable

Our software is perfectly suitable for integration into small, low-footprint embedded systems, as well as for large cloud deployments in high availability or cluster mode.

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Complete

No need to choose several software providers to develop your whole SIP network and infrastructure, as we provide all required client and server signaling and media stacks.

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Interoperable

Already have some pieces of the SIP infrastructure in place? As our products are based on standards, you only need to select the components that you require to complete your project.

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Secure

Linhome, Liblinphone and Flexisip provide strong built-in security features based on open standards: secure user authentication, secure call setup and end-to-end media encryption.

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The client and server software solutions described above are suitable for all kind of embedded VoIP projects, where state-of-the-art SIP and RTP technologies are used to bring audio and video capabilities to IP-based hardware products.

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For more technical information, see our technical resources.

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