Just wanted to thank the OP for the SNR delta tip. I'm connected to an ECI cabinet and found my sync speeds to be at max around 64 Mbps with a SNR of 5/6db. After setting the SNR delta to -50, I got the max of 80 Mbps, but I think DLM has possibly been invoked and banded me but it's still not too bad.
Without changing the SNR delta this is what I got from my sync speeds:
Code:
> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 64156000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 65151016 bps US Attainable Rate : 23977772 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 13 dB Cur SNR Margin : 6 dB
DS actual PSD : 1. 5 dB US actual PSD : 1. 7 dB
NE CRC Count : 151 FE CRC Count : 109
NE ES Count : 129 FE ES Count : 65
Xdsl Reset Times : 0 Xdsl Link Times : 2
ITU Version[0] : fe004452 ITU Version[1] : 41590000
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 : 11 dB Far SNR Margin : 8 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
DSLAM CHIPSET VENDOR : < IFTN >
I flashed the alternative firmware build, given I'm on an ECI DSLAM and it went up to 65 Mbps, but didn't really seem that beneficial. So have since reverted back to the BT firmware build. I then tested the SNR delta change and found I got the full 80 Mbps:
Code:
> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 79995000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 82568328 bps US Attainable Rate : 24143688 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 13 dB Cur SNR Margin : 1 dB
DS actual PSD : 1. 6 dB US actual PSD : 1. 7 dB
NE CRC Count : 24 FE CRC Count : 139
NE ES Count : 24 FE ES Count : 93
Xdsl Reset Times : 0 Xdsl Link Times : 2
ITU Version[0] : fe004452 ITU Version[1] : 41590000
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 : 11 dB Far SNR Margin : 9 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
DSLAM CHIPSET VENDOR : < IFTN >
After a couple of days of leaving the SNR delta change set, I believe DLM has possibly dropped me back down to 73 Mbps with an SNR of 3db, compared to 1dB as it was with the initial SNR delta change.
Code:
> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 73993000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 80554904 bps US Attainable Rate : 22634764 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 12 dB Cur SNR Margin : 3 dB
DS actual PSD : 0.-2 dB US actual PSD : 0.-1 dB
NE CRC Count : 411 FE CRC Count : 241
NE ES Count : 272 FE ES Count : 137
Xdsl Reset Times : 0 Xdsl Link Times : 3
ITU Version[0] : fe004452 ITU Version[1] : 41590000
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 : 11 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
An average of 70 Mbps is still not bad though, compared to where it was originally. It does remain to be seen if it can stay within those limits though.