Still getting the odd re-sync

Started by PuncH, Jan 15, 2010, 14:47:35

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

Steve

I've heard of people double filtering the sky box
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

Yeah I have too, but if it's causing the problem I'll just leave it unplugged. I'm getting rid of Sky soon anyway!  ;D

Rik

The Sky box would feature high up on my list of suspects, Jonathan.
Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

444 CRC's in 10 hours and 2 errored seconds.

Does that sound better??

Steve

Its a lot better than you the ones you posted earlier.
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

Aye...hopefully it's not enough to trigger a re-sync tomorrow morning.

PuncH

Well...no re-sync today. The connection has been up for well over 24 hours, so moving to the test socket and removing the sky+ box has worked, or...my line is now at a speed it can handle assuming it may have degraded rather rapidly.

Anyway, after a few days of stabilty I'm hoping the DLM will up the speed again and then we'll see what happens. If it stays stable then it'll be the sky+ box or the faceplate. If it doesn't I'll have to look at the router, or my line has now gone to poop.

Rik

Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

You don't think there are some wrong doings by BT do you Rik? I've read about them deliberately throttling peoples connections. Mind you, with yours there wasn't a lot to throttle was there!?  :P

Rik

;D

No, there wasn't. I had a line card fault over the Xmas period, since the repair I've lost just under 1M in speed. I've tried a different router and it's in the master socket, no extensions attached.  :dunno:
Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

Steve

With regard to BT throttles I think I've posted these before
WBC banded line profile (rate kbps)
7168 - 14336
4864 - 9728
3328 - 6656
2272 - 4544
1472 - 3072
1152 - 2272
576 - 1152
288 - 576
160 - 288

So the DLM specifies a minimum and maximum sync rate for your line. BT's excuse is to give you a stable connection with minimum resyncs. I assume you know you've been banded if your downstream noise margin is excessively high.
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

Rik

Mine has gone from 6-12db since BT changed the line card, Steve, but I'm assured I have a target of 6db and I'm not banded.  :dunno:
Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

Steve

Would banding perhaps be used on lines with lower downstream attenuation than yours but performing poorly on ADSL2+. What I don't understand is downstream margins in excess of say 20 and a lot lower sync than I would expect.
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

Rik

Quite possibly. ADSL2+ seems much more error concious than ADSL1.
Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

Steve

I looked at my modem stats last night ok its only 60 hours at present but not a single CRC , you won't get that with ADSL2+.
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

Rik

Rik
--------------------

This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

Quote from: Steve on Jan 20, 2010, 17:27:25
With regard to BT throttles I think I've posted these before
WBC banded line profile (rate kbps)
7168 - 14336
4864 - 9728
3328 - 6656
2272 - 4544
1472 - 3072
1152 - 2272
576 - 1152
288 - 576
160 - 288

So the DLM specifies a minimum and maximum sync rate for your line. BT's excuse is to give you a stable connection with minimum resyncs. I assume you know you've been banded if your downstream noise margin is excessively high.

I'm in the 3328 - 6656 band at the moment, with a margin of 30!

Certainly room for improvement, especially as my error count is still at 444 CRC's and 2 Errored seconds!

Steve

So the question I ask myself is what is stopping the modem syncing at a higher rate? It looks like you now have a stable connection with low error rates and you appear to have possibly found the source of some of your interference on your internal wiring.
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

Just waiting for the DLM to up my sync rate again, which it'll hopefully do in a few days. Then I've got to hope it remains stable  :fingers:

Steve

But will the DLM raise your sync speed without BT/ISP intervention? If we look back at adslmax the only control of sync rate was through target SNR margin and the max was 15 with ADSL2+  something else is happening I think?
Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.

PuncH

Yep...support say DLM will raise my sync speed automatically, but it could take up to 14 days. Then it's a case of wait and see.

PuncH

Still waiting for DLM to do it's stuff and unband my connection. Nearly 6 days now of solid sync at 5200kbps since I moved onto the test socket.

PuncH

Update:

DLM kicked in this morning. Sync is up to 16122kbps. Line is no longer on the test socket either, just straight into the mastersocket minus the sky+ box. There are a few errors, but nothing major at the moment.

Now the fun begins!


Steve

Steve
------------
This post reflects my own views, opinions and experience, not those of IDNet.