I have been trying to sort out a SNR issue for years it has been set at around 5dB both up and down, I have a very stable connection but noticed the SNR on upstream had jumped to 14dB. I have tried everything to find the source of the increase, even placing reouter intoe engineers test socke new filter new cable nothing else connected no change. A friend suggested checking the information by telnet into router which I have now completed. I have been trying to find the problem on wrong stream in telnet the 14dB is on the far SNR which I beleive is the downstream not up. I have copy and paste of both seems the firmware on my dratek swaps the up and downstream SNR around. Any help to solve this please.

• vdsl status
  

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ATU-R Info (hw: annex A, f/w: annex A/B/C)

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Running Mode : 17A State : SHOWTIME
DS Actual Rate : 62848000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 72611088 bps US Attainable Rate : 23390000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 0 US Interleave Depth : 0
NE Current Attenuation : 14 dB Cur SNR Margin : 5 dB
DS actual PSD : 6. 7 dB US actual PSD : 13. 4 dB
NE CRC Count : 0 FE CRC Count : 0
NE ES Count : 0 FE ES Count : 0
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : b5004946 ITU Version[1] : 544e0000
VDSL Firmware Version : 05-04-08-00-00-06
Power Management Mode : DSL_G997_PMS_L0

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ATU-C Info

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Far Current Attenuation : 0 dB Far SNR Margin : 14 dB
CO ITU Version[0] : b5004244 CO ITU Version[1] : 434da48c
DSLAM CHIPSET VENDOR : < BDCM >

above was copy and paste from telnet into router below copy and paste from webinterface.
WAN 1 Status
>> Drop PPPoE   Enable
Line Yes
Name VDSL2
Mode PPPoE
Up Time 295:06:10
TX Packets 44846972
TX Rate(Bps) 1384
RX Packets 68910351
RX Rate(Bps) 2543
VDSL2 Information      (VDSL2 Firmware Version:  548006_A )
  Profile 17A
State SHOWTIME
UP Speed 20000 (Kbps)
Down Speed 62848 (Kbps)
SNR Upstream 14 (0.1dB)
SNR Downstream 5 (0.1dB)
  

Apologies for slight thread hijack but can anyone explain to me why in the world of xdsl lines a high signal to noise ratio is considered a bad thing? In every other endeavour in which I've been involved we have always striven for a high SNR :?

Wrt your question, have you ever had more than 20Mb upstream? (I would kill for those high figures). If not, why is it a problem?

Is the firmware pre-vector or the non-vector version? I had similar when the cabinets were upgraded to G.INP and suddenly lost about 12Mbit speed on downstream. That was just before the vector support came into the firmware. Then recently I had other troubles with BT/VT3 and had to go to VT1.

The long and the short is: sometimes openreach do upgrades on the cabinets that are not as transparent as they should be.

Thank you for the replys pre vector just found out I have to change firmware to the new BT one lets pray it works better than BT .

As for speed yes lost around 18Mbps on the vectoring, can see my weekend plans are changed as this needs to be done and resetting all the IPs after hate the messing..