Abstract: A first terminal residing telecommunication network is arranged for initializing media sessions of at least two media types such as voice and messaging to a second terminal. The first terminal is known by a message server as a message client. The first terminal submits a request for a media session set up by means of a message protocol for a media session of a different media type. The request is sent to the message server which forwards the message to a network node. The network node is also known message server as well as to the terminal as a message client. After receiving the media session set up request the network node either sets up the requested media session to both the terminals and bridges the connections for a media session or instructs the first terminal to setup the media session.