Any cross talk from VDSL should not affect ADSL services to a major extent, i.e. no more than the cross talk already present from ADSL and ADSL2+
There is a possibility that it will.
Remember that a VDSL signal is added to the cable a significant way from the exchange where an ADSL signal will already be attenuated by, in some cases 40 or 50 dB so the relative level of cross talk will be higher.
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