My IP profile

A little assistance and advice if possible.
I have posted previously regarding slow speeds with BT, noise levels and IP profile etc.
A little bit of background, I have tested with BT Wholesale and the standard result shows ADSL max should be available on my line between 5 and 8 Mbps. I have complained to BT on many occasions regarding my IP being set constantly at 3000k thereby restricting my IP throughput to approx 2.5.
Three engineers have visited my house to check the line, the last time I was told there was an ' issue ' with my line they were going to fix, i assumed the engineer had some sort of solution but all he did was the same tests the others had performed telling me the line should support 5 mbps. Prior to his visit the sync speed had slowly risen to 5000 and the IP profile had gone up to 4000k with out IP throughput speeds showing 3.7.
With all his line tests i.e. disconnecting my service whilst he performed his tests ( why do they not use my equipment to perform the tests rather than connect to a different server ? that seems to allow them to quote results back that bear no relation to what I am getting ) the IP profile has again dropped to 3000k, he visited lunch time Thursday and now 5 days on with a stable sync speed of 4800 the IP profile is still 3000k.
The figures I have as of 1830 are as follows :
Connection speed Down 4832 Up 448
Line attenuation Down 41 up 11.5
Noise margin during the day is a steady 15 come 1700 hours its all over the place from + 2 to - 2
My last BT speedtester result confirms the above figures with a throughput speed of 2785, other testing sites confirm these figures to be accurate.
BT Wholesale and retail keep passing the responsibility back and forth, from the figures above should I be getting a faster IP throughput speed ? how do the wholesale division get away with saying my line should support in excess of 5 but then delivering a lower figure ?
A thread some weeks ago suggested that one of the contributors to this forum may be able to make some enquiries about ' stuck ' IP profile speeds, I would be grateful for any assistance that could be offered.

how do the wholesale division get away with saying my line should support in excess of 5 but then delivering a lower figure

Without wanting to go back through your previous posts, I assume you've done the obvious and tried in the 'test' socket inside your master.
If that's no different, then your line (unless it has a fault) simply cannot sustain a stable sync of 5000kbps, and you'll just have to live with it.
Some you win, some you lose. If BT were forced to provide the line speed their checker states, I'd be pretty miffed (checker says 1.5Mbps maximum, I can sync at 4000kbps).
There are other factors, but it sounds like you're one of the unlucky lines with a very bad noise problem.

One thing I have noticed, if a line syncs back up, the IP profile doesn't always follow.
It occasionally needs waking up.
The other week, my parents had a line fault (which made the voice line go dead, and the ADSL sync down to around 1600kbps). The fault was, eventually, repaired, and their sync went up to 7600kbps (higher than it had ever been before).
After five days their IP profile was still stuck at 1000kbps (even though they'd had a continuous 7600kbps sync ). A reboot of the router (still sync'd around 7600kbps) resulted in a fall in their IP profile (to 500kbps). I told them to sit tight and leave it alone for three days. Sure enough, three days later their IP profile went up to 6500kbps.

So, maybe try a deliberate re-sync, and wait a few days (just in case it's fallen asleep), just do it during a low noise period!

Alas the checker is just an estimate, not a firm commitment to give you that speed.

Has the line been at the 4832 connection speed solidly for those five days? If it has resync'd it may have dropped to a lower speed.

if the resync's are a nuisance then its sort out internal wiring or get the target noise margin to slow things down to the worst case speed you get.

Andrew

Thanks,
I have done all the suggestions,I have a filtered master socket, I have connected via the test socket, I have totally elininated ( disconected the extension wiring ) the the house wiring by connecting the phone into the master socket I have moved the router as far away from the power sockets as possible, purchased a top range wire between the master socket and router, I have even tried some ferrite rings on the mains lead but no improvement with the noise.
What annoys me is that I have had a stable faster speed but it seems as if I am not being allowed to have it now ( am I getting paranoid ? )
I have a computer running with the Routerstats program monitoring and the sync speed is rock steady, the only dropped connections in the last two weeks being when the engineer was here testing, the noise is good in the day but poor at night and very variable. I have done everything I can think of to eliminate noise, the router is situated at least 30 ft and several walls away from any domestic appliance, are the noise level fluctuations anything BT can improve from their end ?
It is very good from a business point of view to indicate speeds that a customer would be satisfied with but then have the fallback of its only a guide, I cannot think of many other industries who would be allowed to sell something on such a vague promise.
My main concern is to try to find out if my IP profile is stuck as I would have expected it to have rised back to its former speed after 5 days, I have left my router connected now for about 3 weeks ( on the advice of the second engineer, I upgraded in May to the 8Mbps service so I should be beyond the learning period )in the hope of an improvement, I am almost frightened to turn it off in case it syncs even lower when I re connect. What would you suggest leave it on or turn it off overnight and see what happens ?

Your problem is obviously caused by the noise increase at night. Your IP profile will drop to the worst connection speed you regularly achieve.

You need to find what is causing this drop at 17.00 (central heating/ hot water boiler?).

So what sync speeds have you actually had for the last 5 days?

For a number of cases like yours I've chased them up to find that people aren't spotting all of the resyncs

Andrew

Andrew,
Since the engineers visit Thursday my sync speed has been been between 4700 and 4900, I only aware of one brief disconnection between Thursday and now.
Would you suggest I leave the router connected for a few more days to see if there is any change ?
In the past ( several months ago ) I have always turned everything off when going to bed but I am not sure if this is best practice to keep the speed up.
If you could just find out if I am ' stuck ' on 3000k because of faulty equipment or if this is my limit I would be grateful. I am concerned that I can get the profile of 4000k around the times the engineers visit but why does it always drops again within 12 hours to 3000k, the second engineer managed to get the IP up to 4000k within 10 minutes by means of one phone call ! for 12 hours I was satisfied.

Noise my its nature is variable, and is very time of day dependant, alas since ADSL shares the same frequencies as AM radio it is as prone to the interference that gets, and AM radio can interfere also.

I very much doubt you are stuck at 3000Kbps due to faulty equipment, just the reality of noise and how it all interacts.

The engineer probably got you the better sync by reseting the IP profile. Your service provider should be able to see the reports from BT as it makes the changes to the IP profile.

Andrew

That appears to be the problem, BT wholesale and my ISP is BT retail, cannot get a straight answer to any of the questions I ask.
I understand from what you say about the noise but I cannot think of anything else I can try, there is nothing in the house that switches on in the evening that is not working all day, our central heating is solid fuel so no switching on at set times etc.

The problem can be outside if your modem can connect to the DMT software, this gives a SNR bin plot, which can give a hint to the source

Andrew