DLM ISSUES (NEED HELP)

I have recently gone over to AAISP on 21CN and am now experiancing major DLM issues i have had the SNR reset 3 times with no prevail line runs at its normal 5Mb - 5.5Mb for around a day then the DLM kicks in, I have previously been with Eclipse Business and had a IP Profile issue (Permenant restrict to 5Mb despite 6840 - 7000 Kb Sync), Could this be linked??
Any Idea's would be appreciated as i'm going nuts with 2.5Mb

It doesn't just drop on it's own, it's doing it in response to 'something'. Any noise on the line ? What stats does your router show ?

Hi my stats are as bellow during the morning the noise margin can go as high as 18 - 20db
ADSL Link Downstream Upstream
Connection Speed 3072 kbps 1055 kbps
Line Attenuation 47.5 db 24.9 db
Noise Margin 16.9 db 5.7 db

Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN PPPoA 4226908 6323055 0 13211 33551 11:38:10
LAN 10M/100M 5211576 3335704 0 35948 11920 11:39:14
WLAN 11M/54M/270M 4033812 3810342 0 70559 71609 11:38:47

Does This Help??

what's the margin just after a resync ?

Hi I've just rebooted the router and here are the stats just after a reboot.

Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN PPPoA 20 17 0 86 91 00:00:12
LAN 10M/100M 423 416 0 2137 932 00:01:11
WLAN 11M/54M/270M 92 33 0 434 82 00:00:44

ADSL Link Downstream Upstream
Connection Speed 3072 kbps 1016 kbps
Line Attenuation 47.5 db 24.9 db
Noise Margin 17.0 db 5.6 db

BT have just reset the line to interleave again and the noise margin has dropped a fair bit is this normal??

Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN PPPoA 93 87 0 184 691 00:00:32
LAN 10M/100M 5915 6755 0 509 213 01:30:15
WLAN 11M/54M/270M 6894 2691 0 657 64 01:29:48

ADSL Link Downstream Upstream
Connection Speed 3071 kbps 888 kbps
Line Attenuation 47.5 db 24.9 db
Noise Margin 13.3 db 6.5 db

Post deleted by kwikbreaks

Interleaving is a form of error correction so it may be safe to assume that the noise margin can be adjusted accordingly.

Hi all i have had the Interleaving Re - Enabled on the line and rebooted the router here are the stats my ISP also requested BT reset the SNR although this has not happened from what i see. Anybody got any more ideas????


Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN PPPoA 1596 1909 0 1126 6971 00:03:35
LAN 10M/100M 2660 2472 0 6603 1651 00:04:37
WLAN 11M/54M/270M 491 150 0 668 54 00:04:10

ADSL Link Downstream Upstream
Connection Speed 3071 kbps 888 kbps
Line Attenuation 48.0 db 24.9 db
Noise Margin 12.0 db 9.2 db

The thing that stands out to me is that your downstream sync appears to be fixed at 3Mbps. If that is the case it explains why you sometimes have noise margins that don't sit on a 3dB increment immediately after a resync.

When I first saw that I thought you had a very variable level of noise and you had drifted off from the set margin in the short time since you synced but now despite it being very unusual the fixed sync looks more likely. The only way you could get that changed is by talking to a knowledgeable and open minded ISP tech who could in turn speak to a similarly rare rech within BTw - my betting is that this just won't happen even with AAISP

Is there any LLU presence at your exchange?