Noise Problems

psp83 · Mar 23, 2007, 14:45:49

IDnet support has passed this onto BT Whole Sales. So fingers crossed, it'll be sorted soon.

And maybe i can become a happy customer and post some good news on here lol :p

Rik · Mar 23, 2007, 14:49:36

Toes crossed for you, Paul.

psp83 · Mar 23, 2007, 14:54:41

Only toes? i want fingers crossed aswell

You might find it abit harder to type thou

Rik · Mar 23, 2007, 15:00:05

I just cross my eyes - it has the same effect.

psp83 · Mar 24, 2007, 12:29:23

Well ever since i phoned support and they said they would get BT Whole Sales. My connection was more stable last night with just a few high movements in the noise margin.

The router shows i lost connection for 10mins at 6:14am but then reconnected after 10mins with the same sync rate!

How quick does BT Whole Sales respond to request from SP's? And do you think its likely down to them that my connection is more stable now than last night?

Rik · Mar 24, 2007, 12:33:14

I suspect it depends on what action needs to be take as to how fast BTw can respond. If it's a keyboard task, it is often done very quickly, at other times it requires getting someone out to the exchange...

I lost sync this morning due to a huge burst of noise at 10:39. Re-connected at a very low sync speed, then after about 10 minutes I noticed my noise margin had shot up to 12db, so re-booted the router and got back to my normal sync range. Luckily, my profile didn't drop.

psp83 · Mar 24, 2007, 23:25:23

What noise+sync do you normally get then rik?

Sync:

Noise:

As you can see in the images, my stable connection is now back

all day noise was around 15 and has only dropped by around 2 in the evening, which is normal for my line.

Just have to wait for my profile to move of 2mb now.

How quick do profiles go up? and do they go up in stages day by day?

Lance · Mar 24, 2007, 23:52:48

Profile movements up take effect on the fourth day ie after 3 full days. Movements down take a few hours.

As far as I know there is no stepped increase, unfortunately.

If your line only drops by 2db in the evening I would request to have the line's target noise margin decreased down to 6. That way you will see you sync go even higher!

psp83 · Mar 25, 2007, 02:21:10

My profile was on 2000 kbps for a few days, i just checked now and its on 3500 kbps.. Will this increase more since i'm sync'd at 6560 kbps?

Rik · Mar 25, 2007, 10:57:18

It may do. I'd be curious to know why it only increased to 3500 given your sync. It suggests to me that there was a lower sync event in there somewhere.

I sync at in the 3100-3300 range normally, so attract a profile of 2500 most of the time, 3000 if I'm lucky (although currently, I have a stuck profile at 3000). Noise margin is a nominal 9db, though I expect to see temporary drops of up to 7db at times.

psp83 · Mar 25, 2007, 13:06:36

If its not increased by monday before i go to work then i'll give support a call to see if they can get BT to give it a nudge!

Quote from: lance on Mar 24, 2007, 23:52:48If your line only drops by 2db in the evening I would request to have the line's target noise margin decreased down to 6. That way you will see you sync go even higher!

I asked support when my migration was completed if they could contact BT to get my noise margin reset to 9db and explained why it was increased in the first place and they said i have to wait till the 10 days.. but surely this would affect my MSR ? and when i do get BT to drop it down i will have to start my training period again so i can get a better MSR as i was told once your MSR is set, it hardly ever moves?

Rik · Mar 25, 2007, 13:17:19

MSR is really a diversion, it doesn't affect the speed you can achieve, that's controlled by your profile, which will be monitored and adjusted continuously by the DLM software.

The only significant effect of MSR is that it determines FTR. Changing your noise margin does not mean having to go through another training period.