Kitz Forum
Broadband Related => ADSL Issues => Topic started by: shiplu on October 15, 2006, 04:18:28 PM
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I was previously with bulldog 2mb and speed was good very stable.
then I joined tiscali, for a few months the speed was ok,
exactlty after the tiscali line rental was activated my speed / ip profile became 500k.
all online broadband checkers say also that i can only recieve 500k.
it remained at 500k for about 4 or 5 days. then the speed went up to normal speed again at 3MB.
12 or 13 days later the speed went down to 500k again.
I contacted tiscali and I mentioned that the problem came after tiscali line rental was activated and they submitted fualt to BT.
Any expert know what happened and can it be fixed?
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sorry, i just notice i posted in the wrong section
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Test from http://test.speedtester.bt.com:50301/
Test1 comprises of Best Effort Test:
IP profile for your line is - 500 kbps
DSL connection rate: 448 kbps(UP-STREAM) 3680 kbps(DOWN-STREAM)
Actual IP throughput achieved during the test was - 259 kbps
If you wish to discuss these results please contact your ISP.
If you are experiencing problems with specific applications, servers or websites please contact your ISP for assistance.
Your test has completed please close this window to exit the performance tester.
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Hi and welcome to the forum :)
With MAxdsl the speed you get depends on what rate your router syncs to the exchange at.
The Bummer is that you have to have higher stable sync speeds for a full 3 days before your actual profile will be increased.
(What ssems to have happened in the past (500 > 3Mb).
Then it only takes one poor sync speed and within about 75 mins your stuck back down to the lower speeds.
(How dslMAX works (http://www.kitz.co.uk/adsl/maxdsl2.htm))
So whats possibly occuring is that something is causing you to have a poor sync speed.
The trick to getting higher sync speeds is trying to increase your SNR Margin.
Theres several things you can do to try and Improve your SNR Margin (http://www.kitz.co.uk/adsl/lowSNR.htm).
Most routers and modems will tell you what your SNRMargin is so that you can monitor it. Details how to get your SNR Margin (http://www.kitz.co.uk/adsl/frogstats.htm).
Monitoring your SNR Margin can often help understand whats happening on your line.
If you have any probs or want anything clarifying.. just holler
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sorry, i just notice i posted in the wrong section
nps I'll move it to the correct section, but will leave a "shadow" in the old thread so you know where its gone. :)
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I started getting this problem after I moved my computer in new position, could that have caused it.
btw my speed has gone up, from 500k to 1mb this morning
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Im using propper broadband extension rj11, and it is tucked under the skirting board.
see the image below, map of my room. can the TV and other electrical effect the SNR.
could it make it better if i put the rj11 extension close to the celing
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fimg224.imageshack.us%2Fimg224%2F2226%2Funtitledtx4.png&hash=8e2bd7cad5e73886a96e78ec918e055e555f073e)
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here are my snr details from router
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fimg170.imageshack.us%2Fimg170%2F8053%2Funtitledqi5.png&hash=a731327ec9e47eb5a81c82d86b754da6e604d0e3)
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Sorry shiplu... Id typed out a reply then lost it :/
tries again
>> after I moved my computer in new position, could that have caused it.
Its not impossible, - ask mr_chris who moved stuff around in his room, and a previously stable 8Mb connection is now proving troublesome.
I suppose the only way you will know for sure is moving things back as they were again.
As a test you could try just laying the cable round the room the other way
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I know it may look messy but this is just for testing purposes to see if things improve.. and if they do, then its worthwhile seeing if you can keep the cable away from the back of the tele.
Its sometimes hard to know where the noise is coming from.
Fitting a NTE5 adsl filtered faceplate may also help
Out of curiousty which modem is it.. and is the xbox hooked up to your adsl connection too.
A rather expensive solution (thats not guaranteed), is purchasing a wireless router thats known to work well with lowSNR lines, and have it plugged straight into the phone socket. :(
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On the plus side, it does seem like things are slowly improving.
It takes a full 3 days synced at the higher speeds before you will actually see the increased throughput speed.
Your attenuation isnt particulary high.. therefore I would expect you to get much higher speeds than you are currently seeing. Your SNRMargin has a lot of leeway there too.
If you reconnected now.. based on those stats you would probably sync at an even higher speed. However.. the downside is that if you do that.. then your SNRMargin drops as the day wears on (as it will likely do), then you may find yourself resyncing at a lower speed if the SNRMargin drops too low.
If you can keep your connection up as it is now (without dropping), then there is a good chance that in 3 or 4 days time, then your speed will increase to 2.5Mb
It maybe worthwhile monitoring your SNR Margin and sync speed over the next few days to see whats happening.
Its possible that things are now just resettling down after you moving things around.
Therefore if I were you I think I may be temped to leave things as they are for the next few days (keeping an eye on what your line stats are doing).. and seeing if you can get the 2.5Mb throughput.
Then after the 4 days.. if things have proved stable on your current sync speed and if your SNR Margin hasnt dropped too low... you could perhaps see if you can try for 3Mb again.
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Thank you for your expert advice. better advice than the tiscali technical people in india.
im gonna starts some cable changes and see what happens after 3 or 4 days.
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Out of curiousty which modem is it.. and is the xbox hooked up to your adsl connection too.
the modem is SafeCOM SWAMRU-54108
The xbox is linked to the modem by ethernet
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yw..
I'd love to think its expert advice.. :/
Sadly though, SNR is a very variable thing (in more ways than one) and most of the time there really is no hard and fast rules.
aside from the obvious - higher the SNR margin, the better.
What sometimes works for one, doesnt always work for another... and all you can do is suggest various things and hope that one of them works :/
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1 last thing...
is it best to leave the router on over night or switch it off (at night, when not in use) , during these 3 days
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Theres 2 schools of thoughts on this.
Some say leave it connected and dont switch off...
then some say reboot once a day.
One thing is certain though, turning on and off isn't good, so definitely dont do it more than a couple of times a day.
Once is supposed to be ok... particularly if you are hoping for a better sync speed... and it doesnt harm if you say switch off once overnight.
My thoughts are if you have a decent sync speed that you are happy with and its looking good, then leave it alone until you get the higher profile.
- If it aint b0rked dont fix it so to speak.
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As a rule, turning your router off more than a couple of times in a day will cause you problems with your MaxDSL - it will trigger stuff at BT that will think you've got a line fault and will have the overall effect of decreasing the speed at which you can connect, by increasing your target SNR margin.
I am kicking myself for changing stuff around in my room - I used to have a perfectly stable 8Mb rock solid connection for months... now it's up and down more than the proverbial er.. yoyo!
Now my target SNR has now gone up to 12dB for some reason, and I was synced at 5.5Mb for a few days.
But I did manage to get synced at 7.8Mb this morning ;D which is exactly what I wanted - slightly under 8Mb to stop it re-syncing every so often. Now I have to never reboot my router again!! :D
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I have been turning my router on and off several times almost every day before i started this thread.
so I can get a new ip address. is there another way to renew ip address without turning on / off?
what about USB modems, so that mean the more you turn your computer on/off, your likley to get slow speeds?
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This is probably why you've got stuck on 512k. In your router there should be a way to disconnect and reconnect the PPP session (your virtual connection to the ISP), without rebooting, which cuts off your connection to the exchange, which is what causes these sorts of problems.
As for USB modems, I think when you shut your PC down properly, they will disconnect "properly" from the telephone exchange before shutting down, which doesn't make it look like there's a line fault.
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Sorry if I've missed it in the thread, but why are you trying so hard to get a new IP address? Many (most?) ISPs only offer a fixed address anyway, and it's difficult to think of any significant disadvantage if you're using a NAT router.
Eric
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Sorry if I've missed it in the thread, but why are you trying so hard to get a new IP address? Many (most?) ISPs only offer a fixed address anyway, and it's difficult to think of any significant disadvantage if you're using a NAT router.
Eric
to cheat rapidshare downloads.
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the router has been on for: 2 days 1 hours 8 minutes 9 seconds
and the download speed changed to: approx 2 mbps
is this normal, its not even full 3 days. could the speed go higher after 3 full days?
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the router has been on for: 2 days 1 hours 8 minutes 9 seconds
and the download speed changed to: approx 2 mbps
is this normal, its not even full 3 days. could the speed go higher after 3 full days?
Without my magic ball I would say it is possible it might go higher, just in the same way your line has seen a speed improvement in less that the three day time period.
At the end of the day most of it is down to line conditions. No doubt the profiling occurs at certain intervals as I cant believe the equipment at the exchange is going to constantly monitor your DSL's performance.
If the stats remain good and the connection stable then hopefully you might go faster again. Of course, kitz will know more and be able to give you a proper answer!
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The DLM in some respects is a bit of a mystery and BT havent really disclosed too much info about it.
I do know that the equipment monitors and records each sync speed... and theres also a heart beat pulse once a night, when it checks "all ok?"
It is "supposed to be" three full days.. so Im not sure whats happening..
but then again if the DLM has been tricked into thinking that each disconnect is due to an unstable line, we dont really know at which point in time its decided on "2Mb". It does seem to be creeping back up, so maybe because of the way the speed went right down, its gradually increasing???
Hopefully after 3 full days of the even higher speeds.. then it may go all the way back up to 3Mb?
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I cant believe my eyes :D,
after exactly 3 days, the speed has gone up.
Your current bandwidth reading is:
4.33 Mbps
which means you can download at 553.81 KB/sec. from our servers.
one of the highest speeds I ever got.
this is what I changed to get this speed:
I repositioned the extension cable the other way and away from TV and electricals.
I used my old router which hasn't got wireless.
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That's great! I suspect it was the wiring rearrangement which did it for you, but the router may have been a factor as well.
Eric
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I was using my old router during this time, my old router is a SparkCom 4 Port Router
The SparkCom was Displaying connect speed of 5.5mb
now I connected back my usual router, SafeCom SWAMRU-54108 4 port with wireless
that still displays its usual connect speed of 3.7mb (3712 Kbps)
does this means I can get faster downloads speeds on my old router which is out of date and low spec.
and slighly slower speeds on my current router Safecom which has a higher spec.
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It certainly looks that way, although I'm surprised to see such a big difference between the two routers. Perhaps there's a compatibility issue with the particular exchange equipment which happens to favour the SparkCom. Unfortunately, by syncing at that lower speed, your bRAS profile will have gone down again, so even if you put the SparkCom back you'll have to wait another three days for it to come back up. :(
Eric
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There may be hope - if you have only synced once at the slower speed, "blip logic" will not reset your BRAS profile speed down until you sync again at the lower speed.
Then it will take 3 days to go back up again.