upstream snr

[#1]

Any one know if there is a noise margin target system on the g.dmt upstream?
i was running in g.dmt mode since last night as it gave me a better down sync enough to get me 3000kbps profile back and also managed to get 832kbps spot on upsync in g.dmt which got me back to what i had before the trial and an added bouns of realy low errors running g.dmt compared to adsl2 so i was  last night.
today tho the dam thing droped and resynced with a really rubbish upsync and the snr went to whats in the graph below
any way flashed router to dgteam firmware and back on adsl2 but upsync is still pants

[#2]

Looks like you are heading into the unknown on this one, The upstream noise margin generally shown in forum posts (on uncapped services) is usually 6dB for ADSL and ADSL2+ so I assume that is the target for all modes.
David

[#3]

well i resync'ed back to adsl2 to snr is still up at 10db. and that was my throught that its default at 6. and all the testing ive done to night as involved a fair few resync's and up sync is allways at 10db now

[#4]

Since your upstream SNR margin was 7dB before it increased it looks like that the DLM has increased the target to 9dB, which reports as 10dB on your router. I've just checked with the CSC - they are not aware of any problems with 21CN or the THN-AG2 gateway.
David

[#5]

the voyager 210 still sync'ed with a 10db snr
voyager stats
Line Mode ADSL2  Line State Show Time 
Latency Type Fast    Line Up Time 00:00:13:06 
Line Coding Trellis On  Line Up Count 2 
Line Power State L0       
 
Statistics Downstream Upstream 
Line Rate 3123 Kbps 707 Kbps 
Noise Margin 15.1 dB 8.5 dB 
Line Attenuation 50.5 dB 28.6 dB 
Output Power 0.0 dBm 12.7 dBm