Abstract: A method and arrangements are disclosed for distributing configuration information in an xDSL network that comprises network elements on certain hierarchical levels and a network managing station. There is transmitted a request for configuration information from a first network element located on a first hierarchical level to a second network element located on a second hierarchical level. The second hierarchical level is above the first hierarchical level in the xDSL network, but the second network element is other than the network managing station. The second network element decides whether it is appropriate to read the configuration information requested in the request for configuration information from a configuration memory of the second network element. In case it is decided to be appropriate, the configuration information requested in the request for configuration information is read from a configuration memory of the second network element and transmitted to the first network element.

Abstract: The present invention relates to a remote digital subscriber line access multiplexer (DSLAM), and to DSL systems providing data network services to customers. The remote DSLAM has at least two high data rate connections, from which one of the high data rate connections is an optical connection and another one of the high data rate connections is an electrical connection. Alternatively, the connections may be of the same type. The remote DSLAM also comprises a lower data rate connection(s), which is preferably a twisted-pair copper line connection. The remote DSLAM is connected to a central office, a data network node, or another remote DSLAM. The connection to the central office is preferably an optical connection, the connection to the data network node is preferably an electrical connection, and the connection to another remote DSLAM may be an optical, an electrical, or a twisted-pair copper line connection.

Abstract: The method is for controlling the transmission power for a session in a system when transmitting data via a telephone line by using a digital subscriber line between a user terminal and a central unit. The transmission power is increased or decreased between given limit values so that the transmission power is kept as low as possible while still providing a sufficient transmission quality. The transmission quality, and therefore the transmission power, is controlled by the value of the signal-to-noise ratio and the number of bit errors BER within a given time interval.

Abstract: The invention is concerned with a method for controlling the transmission power for a session in a system for transmitting data via a telephone line by using a digital subscriber line between a user terminal and a central unit. In the method, the transmission power is increased or decreased between given limit values so that the power is kept as low as possible, while still providing sufficient transmission quality. The quality criteria according to which the transmission power is controlled consistis of the value of the Signal to Noise Ratio (S/N), and the number of bit errors BER within a given time interval.

Abstract: A method and arrangements are disclosed for distributing configuration information in an xDSL network that comprises network elements (201, 202, 203, 211) on certain hierarchical levels and a network managing station. There is transmitted a request (302, 401) for configuration information from a first network element located on a first hierarchical level to a second network element located on a second hierarchical level. The second hierarchical level is above the first hierarchical level in the xDSL network, but the second network element is other than the network managing station. The second network element decides (404, 408), whether it is appropriate to read the configuration information requested in the request for configuration information from a configuration memory of the second network element.