Just got 20/2 (pair-bonded VDSL2 8a) set up and have it side-by-side with 20/.896 single-pair ADSL2+ (which requires modifying the target SNR to train at the full 20M downstream).
All stats (both VDSL2 and ADSL2+) were taken at the NID. (There's an individual test jack for each pair.) Only one pair was in use at a time, so the setup wasn't completely realistic (potential crosstalk issues with more active pairs). However, after eliminating the rest of the daisy chain of my inside wire (the only active jack now is what is probably the first jack in the chain), the stats on each pair _with all 3 pairs active simultaneously_ are virtually identical.
VDSL2 pair 1
Max: Upstream rate = 3839 Kbps, Downstream rate = 29580 KbpsBearer: 0, Upstream rate = 1018 Kbps, Downstream rate = 10062 Kbps Link Power State: L0Mode: VDSL2 Annex AVDSL2 Profile: Profile 8aTPS-TC: PTM Mode(0x0)Trellis: U:ON /D:ONLine Status: No DefectTraining Status: Showtime Down UpSNR (dB): 23.3 12.8Attn(dB): 27.0 0.0Pwr(dBm): 15.8 8.1VDSL2 pair 2
Max: Upstream rate = 3820 Kbps, Downstream rate = 30554 KbpsBearer: 0, Upstream rate = 1018 Kbps, Downstream rate = 10062 Kbps Link Power State: L0Mode: VDSL2 Annex AVDSL2 Profile: Profile 8aTPS-TC: PTM Mode(0x0)Trellis: U:ON /D:ONLine Status: No DefectTraining Status: Showtime Down UpSNR (dB): 24.8 12.3Attn(dB): 27.1 0.0Pwr(dBm): 15.8 8.5ADSL2+ (target SNR adjusted for comparison at same downstream rate)
Max: Upstream rate = 1356 Kbps, Downstream rate = 20160 KbpsBearer: 0, Upstream rate = 892 Kbps, Downstream rate = 10090 Kbps Link Power State: L0Mode: ADSL2+ Annex ATPS-TC: ATM Mode(0x0)Trellis: U:ON /D:ONLine Status: No DefectTraining Status: Showtime Down UpSNR (dB): 20.6 21.2Attn(dB): 21.0 9.8Pwr(dBm): 19.3 11.7I'm sure 20M downstream on each pair should be no issue and probably won't even require changing the target SNR. I'm skeptical about the attainable upstream rate though; 3.8M seems very optimistic. As far as getting 40/2 or 40/5 (20/1 or 20/2.5) provisioned, that'll probably be difficult.
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