Having great difficulties this weekend

Rik · May 25, 2011, 17:12:17

DLM shouldn't see the occasional resync as instability. However, other factors such as ambient RF noise and the error count are all taken into account as part of the process.

foreversummer · May 25, 2011, 17:13:35

Thanks as always.

I will monitor and see what happens.

Whatever did we do before we had the internet!

Caroline

Rik · May 25, 2011, 17:25:10

Read books?

tehidyman · May 25, 2011, 18:01:59

Quote from: Rik on May 25, 2011, 17:12:17
the error count are all taken into account as part of the process.

What is the recommended way to obtain error count?. (Netgear 834G with RouterStats.)

Rik · May 25, 2011, 18:03:32

Enter this in the browser address bar:

http://192.168.0.1/setup.cgi?todo=debug

which should result in a screen which just says 'Debug enable'.
(That's assuming that you haven't changed the router's IP address from the default).

Then exit from the web interface and open a command-line window. Type:

telnet 192.168.0.1

You should get a BusyBox welcome message to confirm that your telnet connection is established.

Now type:

cat /proc/avalanche/avsar_modem_stats

DorsetBoy · May 25, 2011, 19:37:52

Quote from: Rik on May 25, 2011, 16:21:30
Which, considering the attenuation, must mean a very noisy line.

and given the attenuation the synch seems to be very low, my att. on Max was @ 27db and I was synched at 832/8128 with a 7150 profile throughput of 6835kbps.

foreversummer · May 25, 2011, 20:28:05

Hi Dorset Boy

Well exactly. This is what I had before this problem at the exchange happened. Always synced at 8128 until just before it happened it went down to 7616.

So can't really understand if everything is fixed why I cannot get these speeds.

Caroline

Steve · May 25, 2011, 22:12:28

My guess at that attenuation is that's it's not fixed yet.

DorsetBoy · May 26, 2011, 05:49:05

Quote from: foreversummer on May 25, 2011, 20:28:05
Hi Dorset Boy

Well exactly. This is what I had before this problem at the exchange happened. Always synced at 8128 until just before it happened it went down to 7616.

So can't really understand if everything is fixed why I cannot get these speeds.

Caroline

Well ......... 7616 is BT's magic number , it is the alleged maximum synch possible when interleaving is turned on ( fact is plenty of folk still get 8128 with interleaving, I was one when I ran AdslMax for @ 18 months interleaved and my attenuation is 3 times higher than yours) and even at 7616 your throughput should be higher.

7616 would also be right for the SNR figure you see, what this does tell us is that for a very short line, you must be close to the exchange, there is a lot of interference coming from somewhere . Your village is not exactly an industrial centre, are there any workshops/businesses close by?

Ardua · May 26, 2011, 12:47:24

Quote from: foreversummer on May 25, 2011, 20:28:05
Hi Dorset Boy

Well exactly. This is what I had before this problem at the exchange happened. Always synced at 8128 until just before it happened it went down to 7616.

So can't really understand if everything is fixed why I cannot get these speeds.

Caroline

I am beginning to believe that understanding how ADSL works (and particularly ADSL2+) requires more patience than most us have. After 2 months of line/router instability, my router held a stable connection with an IP of 10000 and connection rate of 11924/1048 for just under a month. I was away from home last week and noted from the log that my router had two disconnections over a 24 hour period: one in the early morning when it was clear from the changed IP address that BT had been fiddling with the line and one at about 1pm when the log shows no errors on the line and a constant downstream SNR of 14. Following this disconnection, the connection rate rose to 12179/1059. Yesterday, I ran a BT Speedtest and found that my IP had risen by 745 to 10745 and downstream SNR has dropped to a constant 12 (line attenuation 15).

My speeds are still well below what is predicted for my line but, after 3 months, I am seeing a slow but steady improvement without any significant amount of exchange congestion. In sum, be patient. ADSL seems to be like a supermarket trolley with a wobbly front wheel; ie, it has a mind of its own.

foreversummer · May 26, 2011, 12:54:17

Oh I agree Ardua with everything you have said.

I'm beginning to think that maybe BT have not really fixed my problem just capped my speed to give me enough to shut me up. Does that seem a reasonable assumption?

Trouble is I hate to keep bothering support - I'm sure they will get fed up with me soon.

Caroline

foreversummer · May 26, 2011, 13:00:39

Thanks for your post Dorset Boy.

Heart of industry we certainly ain't that's for sure! There is nothing industrial between the short distance from the exchange to my house. Just a few more houses, some trees and a stream.

Caroline

Rik · May 26, 2011, 13:12:08

Quote from: foreversummer on May 26, 2011, 12:54:17
Trouble is I hate to keep bothering support - I'm sure they will get fed up with me soon.

They won't.

tehidyman · May 26, 2011, 13:12:44

Quote from: foreversummer on May 26, 2011, 13:00:39
There is nothing industrial between the short distance from the exchange to my house. Just a few more houses, some trees and a stream.
Caroline

The few more houses could be part of the problem. I can sync at nearly 4000Kbps when the guy opposite is away for a few days but within an hour of his return I have crashed to around 2000. However it took me nearly two years to work this out. Good Luck!!!