Talktalk line stability

It�s been a while since I had to fix a line fault, so wanting to check line stats on my mother in laws connection.

I�ve moved her from sky to Talktalk and the line has been very unstable with frequent disconnections.

Talktalk chat support diagnosis was a wifi fault, despite my instance that even when it disconnects the local wifi is still functional.

Line stats are below, reading these the issue is the noise margin is around 3dB even after an immediate disconnect - it never seems to connect with a 6dB margin.

Also, figures are now from the test socket.

Internet Connection

DSL synchronization status:
Up
Connection status:
Showtime
WAN IP Address:
[removed]
Primary DNS Server:
79.79.79.79
Secondary DNS Server:
79.79.79.80
Line Quality

Upstream line rate (kbit/s):
1019
Downstream line rate (kbit/s):
20274
Upstream noise safety coefficient (dB):
8.6
Downstream noise safety coefficient (dB):
3.1
Upstream interleave depth:
8
Downstream interleave depth:
352
Line standard:
ADSL2+
Upstream line attenuation (dB):
5.4
Downstream line attenuation (dB):
11.4
Upstream output power (dBm):
9.9
Downstream output power (dBm):
20.4
Channel type:
Interleaved
DSL up-time:
0 days 0 hours 0 minutes 41 seconds

Edited by MrSaffron (Sun 16-Sep-18 17:09:10)

Does the downstream SNR change? That looks like a 3dB target so not much leeway if there is an intermittent noise source affecting the line. DLM should increase the noise margin as it sees drop out events - or could get talktalk to set it to 6dB or 9dB and sacrifice some speed for stability.

In reply to a post by ian72:

could get talktalk to set it to 6dB or 9dB and sacrifice some speed for stability.

TT can no longer set line profiles manually, its all left to their DLM on adsl2+ lines.

OP,
There could be issues with the modem/modem fw on the router, can you plug in a different router to rule out such issues? If a different router cures the disconnects then request a free replacement router via the TT forums, assuming a TT supplied router is being used.

Edited by deleted (Mon 17-Sep-18 10:38:40)

Weird how Talk Talk cant change your profile, yet Pulse8 can (who use TT backhaul)

TTR and TTB are different beasts to the TT resellers.

In reply to a post by bobble_bob:

Weird how Talk Talk cant change your profile, yet Pulse8 can (who use TT backhaul)

I suspect it would be "won't" rather than "can't".

It fluctuates around that 3dB value, it�s never connected with a margin close to 6.

I�ve asked Talktalk to cap the line at a lower speed or change the target noise margin and they can�t do it (though I suspect they won�t)

I tried a plusnet router and that also synced with a 3dB margin so to me the issue is with the line configuration.

The only thing Talktalk have done so far is send another router which should arrive soon.

I�m guessing that will also sync and 3dB margin and the issue will persist.

In reply to a post by Kr1s69:

I tried a plusnet router and that also synced with a 3dB margin so to me the issue is with the line configuration.

Did the disconnections also occur on the plusnet router? It�s perfectly normal for the DLM to set a 3db snr for a very short (11db attenuation) adsl2+ line, however in theory it should ramp up the SNR if it detects frequent disconnections so there�s clearly something amiss there. Probably worth posting this issue on the TT forums if you haven�t done so already. Good luck!

Do TT retail run a D(ynamic)LM? Or is it basically fixed as in the old days. Don�t forget this isn�t FTTC.

Edited by RobertoS (Fri 21-Sep-18 11:27:36)