Alcatel Lucent

Nokia Solutions and Networks Oy

Edmond Op De Beeck

Eric Van Den Berg

Berten Smits

The present document discloses network nodes and apparatuses deployable in network systems. The network node may be coupleable via a transmission line to the apparatus. In particular, the network node may comprise means for receiving supply power from the apparatus via the transmission line; performing a line measurement on the transmission line; and signaling to the apparatus to disconnect from the transmission line, wherein the means may be further configured to perform the line measurement on the transmission line during a period of time when the apparatus is disconnected from the transmission line. The apparatus may comprise means for providing supply power to the network node; monitoring at least one electrical parameter of the transmission line; and disconnecting the apparatus from the transmission line if a predetermined line condition or a power violation is detected such that the network node can perform a measurement on the transmission line.

Melt with reverse power feed

In accordance with an embodiment, the coupling arrangement includes adders for adding a common-mode signal to a differential-mode signal and amplification units for individually and evenly amplifying input signals present on their input terminals, thereby yielding amplified common-and-differential-mode signals. Coupling units with capacitive coupling are configured to pass the amplified common-and-differential-mode signals towards a wire pair.

Coupling arrangement for phantom-mode transmission

A single-ended low pass filter and its double-ended or balanced version comprising a first coil (Lp) coupled between a first input (Vin) and a first output (Vout) terminal of the filter, a second coil (Lp) coupled between a second input (Vin) and a second output (Vout) terminal of this filter, and a capacitor (C) coupled between the first and second output terminals. The single-ended or balanced low pass filter further includes filter enhancement means (FEM) comprising a current sense circuit (CS) having first inputs coupled across a first impedance (Rsense) coupled between the first input terminal and the first coil, second inputs coupled across a second impedance (Rsense) coupled between the second input terminal and the second coil, and an amplifier (A) having an input coupled to an output of the current sense circuit and having an output connected to a ground terminal (Vgrd) via a third (Ls) and a fourth (Ls) coils, preferably mounted in parallel and also forming part of the filter enhancement means. The coils are magnetically coupled by pairs and are located on a same core of a transformer (T). This filter is used in xDSL splitters. The amplifier may comprise the cascade coupling of a frequency dependent amplifier and a transconductance amplifier. The coil is then enhanced in value and is made frequency dependent, giving a multiple order low pass filter.

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Mechelen, Belgium

Edmond Op De Beeck