Method and an arrangement for securing an ADSL connection

An arrangement for securing an ADSL connection on a telephone line (1) between a subscriber line interface circuit (2) in a central office and a telephone (3) on a subscriber's premises, a first ADSL transceiver (4) being connected to the telephone line (1) at the central office, and a second ADSL transceiver (5) being connected to the telephone line (1) on the subscriber's premises, the first and the second ADSL transceivers (4, 5) normally communicating using a first, normal bit rate, characterized in that it comprises at the central office, a ringing request detector (6) for detecting a request to the subscriber line interface circuit (2) to apply a ringing signal to the telephone line (1), the ringing request detector (6) being adapted, in response to such a detection, to control the first ADSL transceiver (4) to switch from the first, normal bit rate to a second, lower bit rate for the ADSL connection, and to order the second ADSL transceiver (5) to switch from the first, normal to the second, lower bit rate, that the second ADSL transceiver (5) is adapted to confirm to the first ADSL transceiver (4) that it has switched to the second, lower bit rate, that the first ADSL transceiver (4) is adapted, in response to such confirmation, to control the subscriber line interface circuit (2) to apply the ringing signal to the telephone line (1), in response to an off-hook condition at the telephone (3) as detected in the central office, to maintain the second, lower bit rate for the ADSL connection, and in response to an on-hook condition after the off-hook condition as detected by in the central office as well as in response to a disappearance of the request to apply a ringing signal without the telephone (3) having gone off-hook, to control the first ADSL transceiver (4) to switch back to the first, normal bit rate, and order the second ADSL transceiver (5) to switch back to the first, normal bit rate.