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[ammoman]

Hi all, I'm after some advice. I'm on an up to 8mb DSL Max connection with BT, but my speed dropped recently. I now seem to be stuck on an IP profile of 135k. At the moment I am connected directly to the test socket via a BT i-plate. I've been doing a speed test using the BT speedtester and since fitting the i-plate my connection rate has improved, but not the IP profile. Is there anything I can do? Should I contact BT?
Here are my line stats

Bandwidth (Up/Down) [kbps/kbps]: 448 / 2,048
 
Data Transferred (Sent/Received) [MB/MB]: 36.96 / 192.96
 
Output Power (Up/Down) [dBm]: 11.5 / 17.5
 
Line Attenuation (Up/Down) [dB]: 28.5 / 55.0
 
SN Margin (Up/Down) [dB]: 19.0 / 11.0

and here are some of the speedtest results -

BT broadband speed test carried out at 2130hrs 05 Aug 09 – Connected to master test socket.
Your configured download throughput speed for this service is 250 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 640 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 250 kbps
    Actual IP throughput achieved during the test was - 212 kbps

BT broadband speed test carried out at 1308hrs 06 Aug 09 – BT i-plate fitted.
Your configured download throughput speed for this service is 250 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2816 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 250 kbps
    Actual IP throughput achieved during the test was - 222 kbps

BT broadband speed test carried out at 1116hrs 07 Aug 09
Your configured download throughput speed for this service is 135 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2048 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 135 kbps
    Actual IP throughput achieved during the test was - 86 kbps

BT broadband speed test carried out at 1409hrs 08 Aug 09
Your configured download throughput speed for this service is 135 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2048 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 135 kbps
    Actual IP throughput achieved during the test was - 106 kbps

According to the postcode and phone number checker BT say my connection is capable of up to 3mb.
 

[waltergmw]

Hi Ammoman and welcome,

There's something definitely wrong with your broadband connection at present.

There could be something wrong with your internal wiring or up towards the exchange.

Firstly you should plug a filter  and then your modem directly into the test socket thereby disconnecting all your internal house wiring and then run some more tests and collect your statistics again.

Let us know the new figures and your modem type and we'll then offer some more advice.

Kind regards,
Walter

[kitz]

>> I am connected directly to the test socket via a BT i-plate.

I notice the 1st test says the 5th but it says 250 IP profile.
The 135 seems to be a result of something that occured between the 6th and 7th..   you must have had a bad sync during this period.

It could well be that you are having periods of bad syncs sometimes each day which you are not aware of which is keeping your profile low.

May be an idea to grab a copy of routerstats and set it up to monitor your line to see what is happening when.
In particular it would be interesting to see what is happening with your SNR Margin

[jeffbb]

Hi

As well as following Walter's advice  be careful that you are not creating the problem. By that I mean try not to connect and disconnect too many times . It seems as if you have had a series of connections at a low synch rate  ,so dropping your profile . Once it is that low it will take up to 5 days to recover to the level of your present synch rate .That is Your DSL connection rate: 2048 kbps should give profile of 1750 Kbps. Your line should be able to synch at about 3400Kbps with default 6db target SNR .your Target appears to be 12db so that won't be achievable for awhile .
Regards Jeff

Oops Kitz beat me to it

[ammoman]

Thanks to all for the advice. I've downloaded routerstats and will post these results later. I'm hopeful that my IP profile will increase as the connection remains stable. At present there should be no internal reasons for the poor IP as I'm connected to the test socket.

[ammoman]

A quick update. Both my Rx sync speed and Rx noise margin seem to be stable (but slow) at 2048Kbps and 11.5db and I've done another speed test. Here are the results of the speed test and the graphs from routerstats.

BT broadband speed test carried out at 2255hrs 08 Aug 09
Your configured download throughput speed for this service is 135 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2048 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 135 kbps
    Actual IP throughput achieved during the test was - 92 kbps


Suggestions please or is it just a case of wait for the exchange to see that I've got a stable connection? BTW I'm using a BT home hub 1 and hopefully I've configured routerstats correctly.

[attachment deleted by admin]

[roseway]

If your connection speed remains at that sort of level, the IP profile should rise automatically quite soon. It can take up to 5 days from the time when the connection speed first comes back up after a low speed re-sync. Your Routerstats results look fine now.

[ammoman]

Update, well my IP profile seems to have sorted itself out, its now at 1750k with an actual IP throughput of around 1600k. Having checked the routerstats, my Rx noise margin shot up to 16db at about 1.30am and stayed constant until about 8.15 this morning when it dropped back down to about 11.5db. I've attached the graphs and the 2 speedtest results taken today.
Hopefully now my speed is back up to a reasonable speed it will stay there. Thanks again to everyone for their advice.

BT broadband speed test carried out at 0808hrs 09 Aug 09
Your configured download throughput speed for this service is 1750 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2048 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 1750 kbps
    Actual IP throughput achieved during the test was - 1609 kbps

BT broadband speed test carried out at 1209hrs 09 Aug 09
Your configured download throughput speed for this service is 1750 k
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 2048 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 1750 kbps
    Actual IP throughput achieved during the test was - 1591 kbps


[attachment deleted by admin]

[roseway]

That jump in the noise margin between 1:30 and 8:15 is a bit odd, but you have plenty of spare noise margin to cope with it. It looks as though there is something nearby causing a rather high level of interference for most of the day, but getting switched off for a few hours at night. Presumably there's nothing in your own home which switches on and off at those times?

Apart from that your connection looks reasonable now, although it should really be capable of a bit more. I think I would leave it as it is for the time being and see how it goes.

[ammoman]

No, nothing in the house that would cause that sort of jump in the noise margin. We have a substation about 300m away, so that could be the source with the peak of noise margin when there is less load on the substation. I will run routerstats tonight and see if a similar peak occurs.

[jeffbb]

HI
quote  :hopefully I've configured routerstats correctly.

Looks OK  one thing worth trying is to overlay Synch speed on the Noise margin graph . Try right click on Noise margin graph . If you have the option to overlay synch speed select it . Then you only have to keep an eye on one graph. (that is if its available for your router )
Regards Jeff

[ammoman]

Thanks Jeff, I've got the overlay working!

[general disquiet]

That jump in the noise margin between 1:30 and 8:15 is a bit odd, but you have plenty of spare noise margin to cope with it. It looks as though there is something nearby causing a rather high level of interference for most of the day, but getting switched off for a few hours at night. Presumably there's nothing in your own home which switches on and off at those times?

Apart from that your connection looks reasonable now, although it should really be capable of a bit more. I think I would leave it as it is for the time being and see how it goes.

I'm not convinced that the event lasts from 1:20 until 8:15 - I get an almost identical trace from a REIN event lasting a few milliseconds.  The DLM eventually resets the IP profile - it might take a few hours, or a couple of days, or usually after the router has been turned off for a couple of hours.

Look at the following trace:



The IP profile dropped from 1250 to 500 following the REIN.   Today. the event occured at the same time, but was less severe (marginally) and the IP profile didn't drop any lower, but the sync speed had recovered overnight as had the SNR margin.



This happens most days.

[ammoman]

A quick update. Things have settled down now. Through a long deductive process I narrowed down the problem to a combination of a faulty master socket faceplate and the bellwire both now fixed (new faceplate, disconnected all except 2 & 5 and added an i plate).
I've now got a stable connection and my latest test results are
BT broadband speed test carried out at 2221hrs 17 Aug 09
Test1 comprises of Best Effort Test:  -provides background information.
    Your DSL connection rate: 1984 kbps(DOWN-STREAM),  448 kbps(UP-STREAM)
    IP profile for your line is - 1500 kbps
    Actual IP throughput achieved during the test was - 1376 kbps
This is from a BT home hub 1 so I may change to a home hub 2 which BT kindly sent me and see if there is any improvement in IP profile.
Thanks again to all who offered their advice.

[waltergmw]

Hi Ammoman,

I don't know if you realise, but 1984 is the top rung for an IP Profile of 1500 kbps.
If you could get it up to 2048 you'd be nicely in the IP profile of 1750 kbps.

Perhaps a shorter screened RJ 11 cable or a netgear router might just give you the edge if BT's offerings won't ?

Kind regards,
Walter