Got moved onto ADSL2+ around 3 weeks ago (27th Jan) and I can't say it's been very smooth going!
Prior to this, rock solid ADSL max connection (33dB down and 6dB SNRM, Interleaving off), pretty much the full sync and highest IP profile and it would usually stay up 20/30 days+ before I suppose errors got a bit high and it re-sync'd
It now seems that the DSLAM keeps changing things almost for the sake of it!. One minute interleaving is on (sensible for ADSL2+ on this line I suspect), then it switches it off. Errors rise, so I speak to ISP to get it switched back on. Next ... one minute the DSLAM lowers my 12dB upward SNRM to 6dB (fair enough, loads to play with, it looks rock solid to me), then it raises it back to 12dB and now I see it's lowered it again! Downward SNRM up to now (I run Routerstats 24/7) has always been a rock solid 6/7 dB, hardly wavering even during the evening. Now I see that it's been raised to what looks like 9dB for no real apparent reason!!! So that 1Mbps+ chopped off my downward speed.
I should mention maybe, that except for when they switched Interleaving off, error secs/HEC/CRC's have not been too excessive. And speed tests and real world usage / downloads have been fine.
So... my question is... is this normal behaviour on ADSL2+??? Is it still "settling down"???
I'm also starting to wonder if I would be better off forcing ADSL2, rather than 2+ !? As my highest sync has only been around 11Mbps anyway.
If it goes on like this, I'll have little more than when I was on ADSL max!
Moan, moan, moan.
PS. Though I did request a move to ADSL2+ myself, it would have been forced on me later this month by the sound of it anyway.
PPS. Stats currently sitting at:
Uptime: 0 days, 1:39:22
Modulation: G.992.5 Annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,156 / 9,642
Data Transferred (Sent/Received) [MB/MB]: 2.20 / 33.31
Output Power (Up/Down) [dBm]: 12.5 / 0.0
Line Attenuation (Up/Down) [dB]: 15.0 / 37.0
SN Margin (Up/Down) [dB]: 6.0 / 9.5
Vendor ID (Local/Remote): TMMB / µ
Loss of Framing (Local/Remote): 4 / 0
Loss of Signal (Local/Remote): 1 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 310 / 0
FEC Errors (Up/Down): 0 / 1,195
CRC Errors (Up/Down): 0 / 1
HEC Errors (Up/Down): 0 / 1
I suspect you can ignore the "error seconds" as these probably appeared when the re-sync happened. And have not increased since the re-sync. Same with the LOF errors I suspect.
Edited by MrBeeline (Sat 18-Feb-12 16:01:04)