Abstract: A method for operating a first access service depends on the presence of a second access service. The method includes conducting at least one measurement by the first access service and determining based on the at least one measurement whether or not a power spectral density used by the first access service is adjusted.

Abstract: A method is provided accessing a device of a fixed line system comprising: (i) determining at least one measurement result by a measurement function of the device; (ii) comparing the at least one measurement result with at least one predefined value; (iii) conducting a predefined operation if the comparison indicates that the at least one measurement result corresponds to the at least one predefined value; (iv) determining the at least one measurement result by the measurement function, wherein the measurement function is connected or connectable via a connection to a signature function of an access system; (v) wherein the signature function comprises a circuitry that affects parameters measured by the measurement function of the device. Also, a method for access the device via an access system, the device, the access system and a computer program product as well as a computer-readable medium are suggested.

Abstract: Methods, devices, systems and computer readable medium for utilizing interfaces of a network access device are provided. A network access device includes a subscriber interface with at least one subscriber port and a network interface. Methods include (i) checking whether configuration data can be obtained via the network interface; (ii) if the configuration data cannot be obtained from the network interface, checking a predefined condition at the subscriber interface; and (iii) if the predefined condition is fulfilled, enabling the subscriber interface for configuration purposes. Furthermore, an according device and a system are suggested.

Abstract: A method, system, computer program product, and a device for testing are provided. In some implementations, a method includes the steps of (i) conducting a line test on a line of a line card that is not connected to a subscriber line; (ii) comparing the result of the test with a predetermined result; and (iii) determining a defect of the test hardware if the result deviates from the predetermined result. Furthermore, a device and a communication system comprising said device are suggested.

Abstract: In a method for processing a network service request, a first network element that is logically closest to a user requesting the network service manages a file into which data can be entered in respect of a user authorization to receive the network service. A network element includes a device for allowing and blocking transmission of a network service to a user requesting the network service. The device can be switched in accordance with the authorization data contained in the data memory.

Abstract: The invention relates to a method and a system for establishing communication relations (stream1, stream2, stream3) via a communication medium, at least one communication relation (stream1, stream2) being established via said communication medium. According to the invention, information on queries for establishing one respective communication relation (stream1, stream2, stream3) is recorded, and, depending on the recorded information, at least one of the already established communication relations (stream1, stream2) is terminated or maintained. The information recorded can be e.g. the query times (ti), the interval lapsed between two queries being used to infer the type of communication relation (stream1, stream2, stream3). According to the invention it is for example possible for short intervals to infer queries for IP-TV data streams and previously established communication relations (stream1, stream2) are directly terminated in order to save band width.

Abstract: A method and a device for data processing in a digital subscriber line environment. A virtual noise level for a digital subscriber line is determined based on measurement information of at least one network element connected to the digital subscriber line.

Abstract: A method and a device for data processing between a first network element connected via several lines to several second network elements. The method includes the following steps: (i) if a line is trained, at least one other line is switched to a first mode; and (ii) if the line has been trained, the at least one other line is free to switch to a second mode.

Abstract: A method and a device for processing data has data transmitted from a first network component to at least one second network component via at least two lines. According to the novel method the data to be conveyed via the at least two lines is distributed within at least one frame.

Abstract: A method and a device for data processing in a communication network. The method includes the following steps: (i) at least one filter applicable for a first type of connection is provided in front of at least one filter that is applicable for a second type of connection; and (ii) the order of the at least on filter applicable for the first type of connection and the at least one filter applicable for the second type of connection is inverted in case that the number of filters required for the second type of connection increases.

Abstract: Method and device for data processing and communication system with such a device. The method and the device allow data processing via at least one channel. The method includes the following step of transmitting an idle pattern across the at least one channel when no information is conveyed. The idle pattern is created such that interference and/or crosstalk resulting from the idle pattern can be reduced at the receiving side.

Abstract: A method and a device adjust a power allocation of users in a digital subscriber line environment. An intermediate power allocation is determined for at least one user initializing with the digital subscriber line environment based on a new power allocation determined for the digital subscriber line environment containing the at least one user. The intermediate power allocation provides a predefined minimum signal-to-noise ratio margin for the active users of the digital subscriber line environment. Furthermore, a communication system can contain such a device.

Abstract: An optical transmission system comprises a metropolitan core network operated in a wavelength division multiplexing mode and connected via metro connection devices to access connections to optical network terminals connected by means of a passive optical splitter. The metro connection devices contain regenerators and wavelength converters, so that data regeneration takes place between the network terminals and the central management and switching unit. This makes it possible to cover distances around 100 km.

Abstract: A method and a device for data processing are provided, said method comprising the steps of (a) at least one bit of the data is manipulated (405); (b) it is checked whether the manipulation is admissible (406); and (c) if the manipulation is admissible, the manipulated data is transmitted (409). Furthermore, a communication system is suggested comprising said device.

Abstract: A method for protecting a network against a security attack from an user, and in particular, for a layer 2 switch, against a MAC flooding attack. Here, the MAC flooding attack floods the layer 2 switch with at least one packet, a database is provided which saves a MAC address and its allocation and the database has a maximum quantity. According to the method, an interface between the user of the network and a network access functions as a line of demarcation. When the limit of the maximum quantity for a port is reached, the port is blocked during a blocking time. This not only protects the first access node, but also the following network nodes and users respectively, against a security attack.

Abstract: A method for diagnosing an optical communication network having a control system, an optical hub, and multiple optical network terminators. The hub communicates with all the network terminators via an inband management channel. In case one network terminator disturbs the communication from the network terminators to the hub and the communication from the hub to the network terminators is functional, the control system sends a shut-off command to one network terminator, checks if the disturbance is gone, if the disturbance is not gone, sends a pulse mode activation command to this network terminator, checks if there is a superposition signal of the disturbance signal with a pulse mode signal and marks the network terminator as bad, if the pulse signal is not superimposed.

Abstract: In a method for checking a subscriber line with a first and a second electrical line, wherein each line is connected to an encoder/decoder via a subscriber line circuit, the first line is connected to ground, a resistance of the second line is increased, an audio signal is outputted from the encoder/decoder to the first line; and a first frequency-selective signal is measured at a point at which the encoder/decoder is connected to the first line. Further, the second line is connected to ground, a resistance of the first line is increased, a further audio signal is output from the encoder/decoder to the second line, and a second frequency-selective signal is measured at a point at which the encoder/decoder is connected to the second line. An amplitude difference between the first and second frequency-selective signals is ascertained.

Abstract: The invention relates to a method to discover Optical Network Units (ONU) with different speed capabilities in an Ethernet Passive Optical Network (EPON) by an Optical Line Termination (OLT), where logical links in the network are identified by Logical Link IDs, and the OLT can transmit and receive data with 1 Gbit/s-speed (1 G) and 10 Gbit/s-speed (10 G), and the discovery process is handled in the OLT by a Multi Point Control Process (MPCP), which exchanges messages as Data Units (MPCPDU) with the ONUs. This is achieved by extending the standard MPCPDUs in a way, that backward compatability is assured.