DSL ACCESS MULTIPLEXER

摘要

System for simultaneous exchange of analog voice band signals and digital data signals between user termination equipment and local exchange equipment via connection wires, comprising means for exchanging the data signals between the user termination equipment and the local exchange equipment in the format of a modulated carrier signal having a frequency spectrum above the voice band. The system comprises converting means (DSLAM, SBDSLM) for converting the digital data signals into data signals having a specific bandwidth and/or format, being fit to cause no substantial mutual interference between the voice band signals and the converted data signals, and means (MDF, Scab) to merge the converted data signals and the voice band signals to said common connection wires. The signals are merged on the user termination equipment side from the Main Distribution Frame (MDF) at which the cables with connection wires from the subscribers are terminated. Preferably converters are incorporated in MDF blocks. Also preferably broadband signals from DSLAMs that are normally used for servicing one (A)DSL subscriber are converted in smaller band signals and used as the data signals with specific bandwidth.