VDSL uses the existing twisted-pair traditional telephone cables to carry high speed broadband data signals between the network provider’s “cabinet” (typically an above ground street-furniture box) and the customers premises.
The frequencies used in the UK are shown below...
The problem however is that the existing telephone cables were only supposed to carry a simple telephone signal in the audio spectrum up to several kHz and not signals of several MHz. As a result, VDSL broadband signals can cause widespread interference as seen in the plot below...
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| VDSL interference to the 7 MHz (40m) & 10 MHz (30m) bands |
The first one on the Mid-Ulster Amateur Radio Club account outlines what VDSL is and ways to deal with interference...
The second one on the Radio Society of Great Britain (RSGB) account describes VDSL and how people in the UK can complain to OFCOM, the UK regulator...
For further reading, RSGB have provided some additional information...
RSGB Frequently Asked Questions about interference
VDSL Interference Reporting
VDSL Interference Advice Leaflet
