Abstract: In one embodiment, the method for locating a defect in a wired transmission line, which extends between a first end and a second end, includes measuring a first modified noise signal at the first end by a first measuring unit, and making a first representation of the first modified noise signal. A second modified noise signal is measured at the second end by a second measuring unit, and a second representation of the second modified noise signal is made. The location of the defects are derived from the representations.

Abstract: A method and apparatus to transfer data cells having an overhead section and a payload section via a communication medium from a transmitter to a receiver. Before transfer of a data cell, the overhead section of the data cell is translated into a shortened overhead section, known both on the transmitter and the receiver sides, and upon reception of the data cell, the shortened overhead section is translated again into the overhead section.

Abstract: In one embodiment, the method for locating a defect in a wired transmission line, which extends between a first end and a second end, includes measuring a first modified noise signal at the first end by a first measuring unit, and making a first representation of the first modified noise signal. A second modified noise signal is measured at the second end by a second measuring unit, and a second representation of the second modified noise signal is made. The location of the defects are derived from the representations.

Abstract: The present invention relates to a wired transmission line testing method for determining at least one physical characteristic of a wired transmission line where the wired transmission line is coupled between a first line transceiver device and a second transceiver device. The wired transmission line testing method first comprises the steps of a first transceiver sending a first known excitation signal over the wired transmission line and subsequently the step of the first transceiver and the second transceiver both generating a first representation of a received signal respectively including reflected or forwarded portions of the known excitation signal and third a processing part deriving at least one physical characteristic of the wired transmission line based on the first representations generated by the first transceiver and the second transceiver.

Abstract: A method to detect a defective or missing filter at a customer's side between a first connection having a first frequency spectrum and a second connection having a second frequency spectrum and using the same physical transmission medium as the first connection between said customer and a central office equipment (DSLAM), comprises the steps of generating and transmitting at least one first type signal within said first frequency spectrum simultaneously performing quality measurements on said second connection in said second frequency spectrum, analyzing said quality measurements for thereby concluding the presence or not of the correct functionality and presence of said filter. An apparatus for performing the method is as well disclosed.

Abstract: A method and apparatus to transfer data cells having an overhead section and a payload section via a communication medium from a transmitter to a receiver. Before transfer of a data cell, the overhead section of the data cell is translated into a shortened overhead section, known both on the transmitter and the receiver sides, and upon reception of the data cell, the shortened overhead section is translated again into the overhead section.

Abstract: A method and apparatus to transfer data cells having an overhead section and a payload section via a communication medium from a transmitter to a receiver. Before transfer of a data cell, the overhead section of the data cell is translated into a shortened overhead section, known both on the transmitter and the receiver sides, and upon reception of the data cell, the shortened overhead section is translated again into the overhead section.

Abstract: The present invention relates to a method for localizing a defect in a in-house access plant operable to carry broadband communication services. A method according to the invention further comprises the steps of: instructing a user of said in-house access plant to manipulate in-house equipment through an automated and interactive communication session, determining timing information for each manipulation that is carried out, performing remote quality measurements over said in-house access plant while said in-house equipment are being manipulated, identifying from said timing information a particular manipulation that is time-correlated with a substantial change in measured quality, thereby identifying a particular piece of in-house equipment that has been manipulated and in the neighborhood of which said defect is located.

Abstract: A method and apparatus to transfer data cells having an overhead section and a payload section via a communication medium from a transmitter to a receiver. Before transfer of a data cell, the overhead section of the data cell is translated into a shortened overhead section, known both on the transmitter and the receiver sides, and upon reception of the data cell, the shortened overhead section is translated again into the overhead section.

Abstract: A method and apparatus to transfer data cells having an overhead section and a payload section via a communication medium from a transmitter to a receiver. Before transfer of a data cell, the overhead section of the data cell is translated into a shortened overhead section, known both on the transmitter and the receiver sides, and upon reception of the data cell, the shortened overhead section is translated again into the overhead section.

Abstract: A method for bit error rate measurements in a cell-based telecommunication system is presented, comprising the following steps of generating a first bit pattern at a first location of said telecommunication system, transmitting said first bit pattern from said first location to a second location of said telecommunication system, thereby obtaining a transmitted bit pattern, generating a second bit pattern at said second location, said second bit pattern being identical with the first bit pattern and comparing said transmitted bit pattern with said second bit pattern. The first bit pattern is transmitted in at least one unused cell (U, I), said unused cell (U, I) being generated during normal operation of said telecommunication system in the case of a lack of used cells to be transmitted.

Abstract: The invention relates to a method to transfer data cells having an overhead section (Hi) and a payload section (PL) via a communication medium (50) from a transmitter (42) to a receiver (52).

Abstract: A telecommunication transmitter (TU) for a multi-carrier transmission system of the Digital Subscriber Line [DSL] type and which includes a coding circuit (MMC) able to generate “symbols” derived from carriers (Cl-Cn) modulated by incoming data, and a line driver circuit (LDC) to amplify these symbols. When idle data are received, the power dissipated in the transmitter is reduced because the symbols are then merely derived from a few or even a single carrier (the “pilot tone”) instead as from all the available carriers. The power dissipated is even more reduced because the line driver circuit is formed by a parallel connection of a high voltage but low efficiency (LL) and a lower voltage but higher performance (LH) line amplifier. The higher performance, and thus less power consuming, amplifier (LH) is used when idle data are received at the input (IN).

Abstract: A device realizing a method for handling incoming data packets first forwards these data packets from a first unit towards a second unit, extracts within the second unit the header and user information, and performs a step of selecting and processing the header and user information thereby providing selected information in accordance with predetermined information. A selection of at least predetermined part of the selected information is followed by a step of looping back this at least predetermined part of the selected information from the second unit to the first unit. A device realizing a method for assembling and transmitting data packets first generates header and user information within a first unit, transmits this information towards a second unit, which further processes and assembles it to generate therefrom data packets. These are then transmitted back from the second unit via the first unit to an output terminal.

Abstract: A method for bit error rate measurements in a cell-based telecommunication system is presented, comprising the following steps of generating a first bit pattern at a first location of said telecommunication system, transmitting said first bit pattern from said first location to a second location of said telecommunication system, thereby obtaining a transmitted bit pattern, generating a second bit pattern at said second location, said second bit pattern being identical with the first bit pattern and comparing said transmitted bit pattern with said second bit pattern. The first bit pattern is transmitted in at least one unused cell (U, I), said unused cell (U, I) being generated during normal operation of said telecommunication system in the case of a lack of used cells to be transmitted.