Abstract: The invention relates to methods for establishing a video call between calling (UEA) and called (UEB) terminals through a telecommunications network comprising a service node (SN) for providing a video application. The inventive method comprises the following stages: a stage for requesting to establish a call between the calling and called terminals, an alarm stage indicating that the called terminal is alerted, a connection stage indicating that the called terminal is picked up, a trading stage for establishing logical video and audio channels between the calling terminal and the service node, wherein the beginning of the trading stage between the calling terminal and the service node is situated after the beginning of the alarm stage and before the beginning of the connection stage.

Abstract: The invention relates to methods of setting up a video call between a calling terminal (UEA) and a called terminal (UEB) via a telecommunications network. The method comprises a request step of requesting the setting up of a call between the calling terminal and the called terminal, an alert step of indicating that the called terminal has been alerted, a connection step of indicating that a user of the called terminal has taken the call, and a negotiation step of negotiating the setting up of audio and video logical channels between the calling terminal and the called terminal; the beginning of the negotiation step is after the beginning of the alert step and before the beginning of the connection step.

Abstract: The object of the invention is to provide an acquisition method for a multipoint-to-point CDMA network (NET) that minimizes the influence of the acquisition procedure on the information transmission. The acquisition signals are encoded in a specific acquisition code that differs from the CDMA communication code of the information signals. In addition, the acquisition signals are transmitted with an amplitude smaller than that of the information signals. At the receiving end, the acquisition signals are detected by correlation (11) and subsequent accumulation (12). This method maximizes the transmission capacity of the information signals. In addition, the acquisition time is reduced since adaptive contention-resolving techniques can be employed taking account of the estimated number of colliding terminals (2, 3, 4, 5).