A method of switching a multimedia session from a mobile terminal (2) connected to a mobile communications network (21) to an indoor device (11; 12; 13; 14) connected to an indoor local area network (150) including an indoor gateway (15), the mobile terminal (2) and the indoor gateway (15) being connected to an application system (20) that sets up multimedia sessions. The method includes setting up a first multimedia session between the mobile terminal (2) and the application system (20) via the mobile communications network (21). The mobile terminal (2) detects the proximity of the indoor local area network (150). Indoor devices (11-14) are selected that are capable of supporting the first multimedia session in progress on the mobile terminal (2). The mobile terminal (2) validates an indoor device from the selected devices. A second multimedia session is set up between the validated indoor device and the application system (20), and the first multimedia session is closed.