Direct IP Call between Linphone SIP Client and MOBTIX Camera

The MOBOTIX IOT camera can establish an audio or audio/video sip connection with any SIP client.

This article describes the connection between the SIP client Linphone and a MOBOTIX Q25 that establishes the connection between the two devices based on a direct IP call (direct SIP call) in a local network without using SIP servers, SIP accounts or SIP registrars.

SIP Client used:

In the case described, the macOS variant was used.

A MOBOTIX Q25 was used as the SIB remote station.

The basic requirement for this setup is:

In my case the camera had the IP and the PC with the subnet mask

  1. Install Linphone

Please ignore the suggested paths (buttons) displayed below!

  1. Deactivate IPv6 in the Linphone settings

Screenshot 2023-03-10 at 15.08.53

  1. Restart Linphone if necessary

  2. Check if the address in the upper left corner contains the local PC address (the additional information like “jst” has been taken over from the Mac user).
    Screenshot 2023-03-10 at 15.08.19

  3. Enter the address of the MOBOTIX Q25 in the middle input field at the top of the dialog in the following form:

  4. Sip:

  5. Then press the camera icon to start the call.
    Screenshot 2023-03-10 at 15.09.39

  6. Then the connection with the camera is established with image and sound.

Linphone variant used:

Screenshot 2023-03-10 at 15.10.02

For debuging of the incoming calls:
The MOBOTIX camera logs each incoming call in the Sip Client Message , Call , Status