If you have a DrayTek, and judging by the way the stats are output I believe you do, then you can potentially squeeze a little more speed out of your downstream. As long as the errored seconds are low enough to allow for it that is. One of my lines performs exceptionally better than the other, which allows me to reduce the target SNRM offset (currently -10, which is 5 dB). I've had the offset as low as -2.5 dB (or -25, which makes the target SNRM actually 3.5 dB) for my good performing line of the two lines I have, but nudged it back up recently because of the storms but now they've gone.
"vdsl snr [delta]"
"vdsl savecfg"
Where [delta] can be between -50 to 50 and is represented as dB/10. For example, a value of -20 would decrease the downstream SNRM target by -2.0 dB.
If you do this then I suggest doing it in small increments at most once a day and monitoring for stability, by either -5 or -10 (-0.5 dB or -1.0 dB).
> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 65239000 bps US Actual Rate : 15725000 bps
DS Attainable Rate : 65604696 bps US Attainable Rate : 15955998 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 16 dB Cur SNR Margin : 5 dB
DS actual PSD : 6. 7 dB US actual PSD : 12. 7 dB
NE CRC Count : 464 FE CRC Count : 5650
NE ES Count : 366 FE ES Count : 4566
Xdsl Reset Times : 0 Xdsl Link Times : 2
ITU Version[0] : 00000000 ITU Version[1] : 00000000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 22 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544ed086
DSLAM CHIPSET VENDOR : < IFTN >
> vdsl snr
Usage:
vdsl snr [delta]
delta: SNR margin delta. The SNR margin delta should range from -50 to 50.
delta=1 means 0.1dB.
Current VDSL SNR Margin is 5 dB.
Current VDSL SNR Margin delta setting is -10.