Detecting Bridged Tap and Noise Interference in VDSL2 Access Networks using the JDSU SmartClass™ TPS
●Data rates associated with VDSL2 provide great market opportunities for operators and service providers, but they also increase scrutiny on the converged service when deployed incorrectly because the customer may be the first to notice diminished QoE. While VDSL2 provides signifi-cantly more bandwidth than ADSL2+, it also challenges the copper loop more because it uses a higher frequency spectrum. Copper loops that performed well for ADSL2+ may fail dramatically with full VDSL2 performance. Especially short bridged taps (between 2–50 m) can degrade VDSL2 data rates significantly.
●The graphical BPT, SNR, Hlog, and QLN diagnostic modes on the SmartClass TPS allow deeper analysis of questionable DSL data throughput performance. It enables the detection of the presence of bridged taps, including their approximate length, frequency areas of noise interference, or capacitive faults due to corroded contacts. Removing the root cause of these faults enables operators to provide a more reliable DSL line with higher data rates.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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May 2011 |
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