In reply to a post by huwwatkins:

About 1000 crc errors over the last 24 hours. 13 HEC and 107 ES

Batboy - I wonder if the noise I can hear on the line is killing my snr?

Those are good figures. Just a correction of one of your posts earlier the Target margin on TT LLU is 6db not 9db.

Thanks - I was just going off what the tech support line told me.

I will phone Post Office who my voice line is with and report a fault.

Line Attenuation 24.5 db 14.9 db
Noise Margin 6.1 db 9.3 db


your noise margin is low for the length of your line.

I have 28db attenuation and get a better noise margin than you of 12db.

Thats because your sync speed is capped.

[cough]
There is no direct correlation between length of line and noise margin.

Unless you are on ADSL(1) with Zen, (I assume you are still with Zen), a noise margin of 12dB immediately after connecting is indicative of current or past fairly serious problems.

If you are on ADSL2+ your connection speed should be well in excess of 16Mbps. Are you, and is it? The speed test result in your sig indicates ADSL2+. You should be getting over 14Mbps on a speed test.

If it is lower, I think a thread of your own questioning it is indicated, as continung here would be poaching and also way off topic.

Edited by RobertoS (Wed 14-Mar-12 22:15:13)

surely it works the other way, sync speed is governed by line attenuation and noise margin +plus other factors...

------------------------------------------------------------------------------

SDSL StatusADSL Status Mode State
ADSL2+(G.992.5) SHOWTIME
Up Speed 1208000
Down Speed10776951
SNR Margin10
Loop Att.33


Here are my current stats, on Zen ADSL 2

you are correct Robertos, historically I had serious problems with the line. Think my target snr is still set at 12 thinking about it, maybe i could get this lowered now

Those are ADSL2+ stats not ADSL2. You should sync at 13Mbps. The missing 3Mbps is accounted for by your high noise margin.

Ta, i might call Zen tomorrow and see if there is anything they can do to improve things