Abstract: A method of upgrading the software of a terminal of a telecommunication network, in particular a wired video telephone, includes the steps of periodically sending a first signal from the terminal to a service center via an intelligent network, the first signal including a service access code containing information related to the current software version installed on the terminal; checking, in a data base containing information on the different software versions available in the service center, if the current software version corresponds to a correct software version; sending from the service center to the terminal a second signal, in the form of a DTMF sequence, indicative of the result of the step of checking; possibly displaying a message on the terminal to inform the user that the software has to be upgraded; and remotely downloading the software.

Abstract: A method of setting up a video telephone call between a first video telephone terminal and a second video telephone terminal on a data network includes the steps of: establishing a telephone call over a telephone network between the first and second terminals; exchanging between the first and second terminals during the telephone call availability signals to seek availability to hold a video telephone call; if the availability is confirmed, releasing the telephone call; establishing respective telephone calls between each of the first and second terminals and a corresponding access server of the data network, for achieving connection of the first and second terminals to the data network; establishing a signalling exchange between the first and second terminals through a service center of the data network to achieve the set up of the video telephone call; and establishing a peer-to-peer video telephone call between the first and second terminals over the data network.

Abstract: In order to permit a video telephone call to be set up between at least one first video telephone terminal and at least one second video telephone terminal in a telephone network, a service center is adapted to connect with the first and second terminals over the telephone network. A telephone call is first set up between the first terminal and the second terminal in order to exchange availability signals between the terminals to seek availability to hold a video telephone call therebetween. If such availability is confirmed, the telephone call between the first and second terminals is released, and telephone calls are established between the service center and the first and second terminals, whereby the first and second terminals are connected to one another over the telephone network via the service center. A video telephone call is then set up between the first and the second terminals via the service center.

Abstract: A method of setting up a video telephone call between a first video telephone terminal and a second video telephone terminal on a data network includes the steps of: establishing a telephone call over a telephone network between the first and second terminals; exchanging between the first and second terminals during the telephone call availability signals to seek availability to hold a video telephone call; if the availability is confirmed, releasing the telephone call; establishing respective telephone calls between each of the first and second terminals and a corresponding access server of the data network, for achieving connection of the first and second terminals to the data network; establishing a signalling exchange between the first and second terminals through a service center of the data network to achieve the set up of the video telephone call; and establishing a peer-to-peer video telephone call between the first and second terminals over the data network.

Abstract: A method of upgrading the software of a terminal of a telecommunication network, in particular a wired video telephone, includes the steps of periodically sending a first signal from the terminal to a service center via an intelligent network, the first signal including a service access code containing information related to the current software version installed on the terminal; checking, in a data base containing information on the different software versions available in the service center, if the current software version corresponds to a correct software version; sending from the service center to the terminal a second signal, in the form of a DTMF sequence, indicative of the result of the step of checking; possibly displaying a message on the terminal to inform the user that the software has to be upgraded; and remotely downloading the software.

Abstract: In order to permit a video telephone call to be set up between at least one first video telephone terminal and at least one second video telephone terminal in a telephone network, a service center is adapted to connect with the first and second terminals over the telephone network. A telephone call is first set up between the first terminal and the second terminal in order to exchange availability signals between the terminals to seek availability to hold a video telephone call therebetween. If such availability is confirmed, the telephone call between the first and second terminals is released, and telephone calls are established between the service center and the first and second terminals, whereby the first and second terminals are connected to one another over the telephone network via the service center. A video telephone call is then set up between the first and the second terminals via the service center.