Combination device for dsl phantom mode signals in telecommunication systems

Abstract

A device for converting DSL telecommunication signals on first (DM1) and second (DM2) DSL lines and DSL telecommunication signals on third DSL line (DM3) to first (P1) and second (P2) DLS DSL phantom mode signal combining device for other DLS telecommunication signals on the transmission line. The combination device includes a first pair of series-coupled first (LL11) and second (LL12) magnetically coupled coils to which the first DSL line and the first DSL transmission line are electrically coupled, and the second DSL line and the second DSL A second pair of serially coupled first (LL21 ) and second (LL22 ) magnetically coupled coils to which the transmission line is electrically coupled. A third DSL line is coupled to the first coupling means (CP31) between the first coil and the second coil of the first pair and to the second coupling means between the first coil and the second coil of the second pair ( CP32). The coupling device is a single connection point or preferably a high-pass filter. The DSL phantom mode signal combining device is located in a phantom injection module (PBox) provided with at least five terminals respectively associated with the first DSL line, the second DSL line, the third DSL line, the first DSL transmission line and the second DSL transmission line among. The phantom injection module is located at a remote location such as a line termination LT board of a telecommunications switch or a main distribution frame MDF. The first DSL line, the second DSL line and the third DSL line are connected to different ports of these devices.

Description

technical field [0001] The invention relates to a DSL phantom mode signal combining device adapted to convert a first DSL telecommunication signal on a first DSL line, a second DSL line and a third DSL line into a first DSL transmission line and a second DSL transmission line Two DSL telecom signals. [0002] The purpose of such combination devices is to add / inject DSL phantom mode signals into the DSL lines of existing telecommunication systems. Background technique [0003] The best place to inject phantom mode coupling is the central office CO and especially at the level of the line termination LT board. However, this means that the design must be plugged into the system's new line termination LT board. Known drawbacks of such solutions are the replacement of the board itself, the need for an interruption to the system, the use of extra board area on the line LT board, etc. Furthermore, the existing wiring, patch panels, etc. between the line termination LT board and t...

AI Technical Summary

Problems solved by technology

However, this means that the design must be plugged into the system's new line termination LT board

Known drawbacks of such solutions are the replacement of the board itself, the need for an outage to the system, the use of additional board area on the line LT board, etc.

Also, the existing wiring, patch panels, etc. between the line termination LT board and the MDF are not optimal for phantom signals

This can lead to non-compliance with ITU standards (e.g. longitudinal conversion loss, impedance matching to splitters, EMC management), and / or lead to loss of DSL performance

In some cases, the "crippled" phantom mode even results in a rate-reach equal to that available with regular bonding

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