Matkaviestinjärjestelmä

The present invention relates to a mobile communication system comprising a first and a second transceiver units (1, 2, TBS1) communicating with each other and comprising means for utilising discontinuous transmission. In order to prevent the transceiver units from using discontinuous transmission with transceiver units that cannot utilise discontinuous transmission, the transmission means of the first and the second transceiver units (1, 2, TBS1) are arranged to transmit a predetermined message indicating discontinuous transmission after the set-up of the data transmission connection. Furthermore, the first and the second transceiver units (1, 2, TBS1) comprise detection means for detecting said predetermined message. Said means for utilising discontinuous transmission are responsive to the detection means in order to introduce discontinuous transmission when the detection means of the first and the second transceiver units respectively have detected the reception of said predetermined message.