Broadband Speed Experts - sync and ip profile stuff
29 November 2009, 12:03 PM
#1
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Broadband Speed Experts - sync and ip profile stuff
I have had some issues with my current BB connection, as I have noticed my IP Profile has been reduced. I have not got a record of exactly what it used to be, but I swear it was more than it currently is.
Anyway, I recently bought a new router and checked everything out. Checked all the wiring in the house. Did the usual and plugged straight in to the master test socket and checked against all other sockets, to see if there was a difference in noise db. There was not, so all sockets are the same. Removed the "ring" wire on all sockets and that made no difference either.
Now I have a connection sync of 4480 but my IP Profile is 3000. According to what I have read my IP Profile should be 3500.
Will my IP Profile now be moved up to 3500 and if so, should I keep restarting my router periodically to enforce this change. I have heard that can cause problems though, as BT pick these restarts up as dropped connections and bring the IP Profile down instead.
Should I leave my router on all the time?
I believe an IP Profile change can take up to 3 days for changes in the sync speed that are quite small.
According to the tables I need a sync speed of at least 4544 to move to an IP Profile of 4000, which I am pretty sure I was once on. So this is a bit of a bugger as my sync speed is very close.
Advice appreciated.
Anyway, I recently bought a new router and checked everything out. Checked all the wiring in the house. Did the usual and plugged straight in to the master test socket and checked against all other sockets, to see if there was a difference in noise db. There was not, so all sockets are the same. Removed the "ring" wire on all sockets and that made no difference either.
Now I have a connection sync of 4480 but my IP Profile is 3000. According to what I have read my IP Profile should be 3500.
Will my IP Profile now be moved up to 3500 and if so, should I keep restarting my router periodically to enforce this change. I have heard that can cause problems though, as BT pick these restarts up as dropped connections and bring the IP Profile down instead.
Should I leave my router on all the time?
I believe an IP Profile change can take up to 3 days for changes in the sync speed that are quite small.
According to the tables I need a sync speed of at least 4544 to move to an IP Profile of 4000, which I am pretty sure I was once on. So this is a bit of a bugger as my sync speed is very close.
Advice appreciated.
29 November 2009, 04:39 PM
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Shaun,
I found when i changed the face plate on my master socket to one of the BT NTE2000 it changed my noise margings to such an extent that i was able to see my line speed increase from 1Mb to 3.2Mb!
Might be worth considering? Had i know a week ago before i moved house i would have sent you the faceplate...
I found when i changed the face plate on my master socket to one of the BT NTE2000 it changed my noise margings to such an extent that i was able to see my line speed increase from 1Mb to 3.2Mb!
Might be worth considering? Had i know a week ago before i moved house i would have sent you the faceplate...
29 November 2009, 06:26 PM
#3
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Ian,
Waste of time apparantly, if you have already disconnected the "ring" / "bell" wire, which I already have.
Currently my line attenuation is 42db and noise margin 11.4db (downstream).
Waste of time apparantly, if you have already disconnected the "ring" / "bell" wire, which I already have.
Currently my line attenuation is 42db and noise margin 11.4db (downstream).
29 November 2009, 09:53 PM
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Are you looking at the IP profile according to your ISP or according to BT?
The BT Speedtest site gives your current profile once you do a speed test. Your ISP profile should follow the BT one, though as you say, it may be up to 3 days.
Dave.
The BT Speedtest site gives your current profile once you do a speed test. Your ISP profile should follow the BT one, though as you say, it may be up to 3 days.
Dave.
29 November 2009, 10:26 PM
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Use the site "sam knows"
this will give a pretty good approximation of what you should get..
your attenuation is peanuts compared to mine (63db)
I get 3-3.3Mb DL and up to .5Mb upload..
Also it depends on what your router (assuming you have one) is configured to.
First i would ring your Isp, and see if they have set any limits on the line,
mine was set to 2mb as they reckoned it gave the best stability... a quick
tweak and i was back at 3mb
( i knew it was 3mb capable as i had been running on that for some time before
), and BT confirmed the line was capable
Then depending on your router, you may be able to use telnet and go a
tweaking
I used DMT to alter the routers SN ratio... (if it supports your
router, you play off speed against stability....
Mart
this will give a pretty good approximation of what you should get..
your attenuation is peanuts compared to mine (63db)
I get 3-3.3Mb DL and up to .5Mb upload..
Also it depends on what your router (assuming you have one) is configured to.
First i would ring your Isp, and see if they have set any limits on the line,
mine was set to 2mb as they reckoned it gave the best stability... a quick
tweak and i was back at 3mb
( i knew it was 3mb capable as i had been running on that for some time before
), and BT confirmed the line was capableThen depending on your router, you may be able to use telnet and go a
tweaking
I used DMT to alter the routers SN ratio... (if it supports your router, you play off speed against stability....
Mart
30 November 2009, 08:47 AM
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If you are plugging the setup into the test socket then i suspect the face plates would not make a difference.
I noticed a huge difference at work with a proper faceplate, mainly because the stock one was buggered, if you go with somebody like BE instead of your current provider, you pretty much get the max speed you can, all of the time, as far as i am aware they don't do the stupid lagged profile thing.
My router is switched off overnight and every morning when it boots up, it synched up at maximum speed (around 7.5mb) i was synched with BT at around 4mb and if something ever happend, then the profile would drop and take weeks to return back up.........
I noticed a huge difference at work with a proper faceplate, mainly because the stock one was buggered, if you go with somebody like BE instead of your current provider, you pretty much get the max speed you can, all of the time, as far as i am aware they don't do the stupid lagged profile thing.
My router is switched off overnight and every morning when it boots up, it synched up at maximum speed (around 7.5mb) i was synched with BT at around 4mb and if something ever happend, then the profile would drop and take weeks to return back up.........
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30 November 2009, 09:28 AM
#8
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How long have you had the sync of 4480? An ip profile does indeed take 3 days to update but can often get 'stuck' requiring the isp on your behalf to request BT to reset it.
Ip profile's work on increments of .5mb and there is an overhead of .5mb for the connection so like yours for example having a sync speed 4480 your ip profile should be 3.5mb. Round down to the nearest .5 mb and then take .5mb off for the overhead for the ip profile which = throughput speed.
The above is based on extensive conversations I had with BT engineers at my last house who were constantly trying to resolve a BB issue and with them being there so much and me asking so many questions I got to find out how it works. It may have changed but I don't think it has.
Oh and yes I think it is better to leave the router always on, certainly during the ip profile stage as the exchange wont determine between you turning the router off and the line dropping due to a line issue and therefore dropping your speed to try to compensate.
Ip profile's work on increments of .5mb and there is an overhead of .5mb for the connection so like yours for example having a sync speed 4480 your ip profile should be 3.5mb. Round down to the nearest .5 mb and then take .5mb off for the overhead for the ip profile which = throughput speed.
The above is based on extensive conversations I had with BT engineers at my last house who were constantly trying to resolve a BB issue and with them being there so much and me asking so many questions I got to find out how it works. It may have changed but I don't think it has.
Oh and yes I think it is better to leave the router always on, certainly during the ip profile stage as the exchange wont determine between you turning the router off and the line dropping due to a line issue and therefore dropping your speed to try to compensate.
Last edited by Bravo2zero_sps; 30 November 2009 at 09:29 AM.
30 November 2009, 10:19 AM
#9
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Bravo,
Only 24hrs..... but since Mart posted above I have been playing with my SNR's on the router (thanks for the heads up Mart!).
I took the SNR down to 9db and it gave me a sync speed of 49xx. I will see if it has been stable when I get home tonight, by checking the logs. If it has then I will take the SNR down to 6db and leave again for 24hrs. An SNR of 6db should give me (based on he previous 3db reduction) a sync speed of 54xx, which should relate to an IP Profile of 4500. That will do for now.
Only 24hrs..... but since Mart posted above I have been playing with my SNR's on the router (thanks for the heads up Mart!).
I took the SNR down to 9db and it gave me a sync speed of 49xx. I will see if it has been stable when I get home tonight, by checking the logs. If it has then I will take the SNR down to 6db and leave again for 24hrs. An SNR of 6db should give me (based on he previous 3db reduction) a sync speed of 54xx, which should relate to an IP Profile of 4500. That will do for now.
30 November 2009, 07:53 PM
#10
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OK... after playing with the SNR I have managed to secure a BT IP Profile of 4 meg. So far so good. I carried on tweaking the SNR tonight and managed to ramp the sync speed up to 6400. 
Unfortunately that caused a dropped connection. 
I have now adjusted the SNR and now have a sync speed of 5600. If this stays stable, I will then achieve an IP Profile of 4.5meg. That will certainly do, as I was on 3meg.
Fingers crossed.
Unfortunately that caused a dropped connection. I have now adjusted the SNR and now have a sync speed of 5600. If this stays stable, I will then achieve an IP Profile of 4.5meg. That will certainly do, as I was on 3meg. Fingers crossed.
01 December 2009, 06:04 PM
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just a couple of points b/b will vary up and down i have around 6 meg in am and can be down to 3 meg in evening and bt b/b will see int on /off of router as fault and will set output to highest then check over few days to see if stable then as previously stated will drop it a bit to keep it so
01 December 2009, 08:07 PM
#14
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Sync has been stable at 5600 for 24hrs. This should take my IP Profile to 4500. I will wait for this profile change to take place and then may tweak the SNR slightly to get me in to the next band over 5696. That will equate to a 5000 IP Profile.
04 December 2009, 08:46 PM
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Just to update that based on the help from Mart360, my IP Profile is now at 4500 and stable. This is quite a difference from my original 3000. Download speed is now just over 500kb a second without any accelerators.
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