Dropping connection
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Dropping connection
16-08-2007 4:23 AM
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Twice more in the early hours I have dropped the connection. This is really puzzling to me. The wiring is correct and I checked the SNR immediately on reconnection and it was 7 or 7.5 dB (at the moment it's showing 6.5 dB's).
I hoping that the new router and microfilters that will be coming as part of the changover to BBYW Option 3 may improve the situation as I'm at a loss to see what is wrong.
I never had this problem before until I upgraded to DSLMax in mid February.
It's more annoying than anything else.
Re: Dropping connection
16-08-2007 8:18 AM
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It may be that with your current router it has a problem if the SNR drops below 6dB and it drops the connection.
Re: Dropping connection
16-08-2007 8:26 AM
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Will your new router/filter improve things ? maybe. Some routers are better than other at handling errors at low SNR values so they may actually keep the connection up at around 6db whereas others will drop it. If your new router is compatible with the DMT tool then you can 'tweak' the target SNR ( look at this post http://community.plus.net/forum/index.php?topic=407.15 ). Setting the target upwards slightly to say 9db will give you a slightly slower speed but may eliminate the dropouts. With the DMT tool you can experiment to find a target SNR that gives you the best combination of speed versus dropout performance.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
Re: Dropping connection
16-08-2007 11:14 AM
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Quote from: coastergrotto … and I checked the SNR immediately on reconnection and it was 7 or 7.5 dB (at the moment it's showing 6.5 dB's).
As stated in a earlier post, after reconnection the SNR margin should always be around its target of 6db. The important number is the sync speed/data rate/line speed - whatever it is called on your router. Normally after disconnection that will reduce to restore the SNR margin back to 6db. Seeing it as high as 7-7.5db strikes me as strange.
If the sync speed doesn't reduce when the connection is restored it suggests either your router is faulty or that there are sudden, brief bursts of noise on your line which cause loss of sync (hence disconnection), but have disappeared by the time your router re-syncs and reconnects.
Do you have a record of the sync speed history?
Re: Dropping connection
16-08-2007 12:38 PM
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I was rather frightened of messing about tweaking the SNR on the Belkin router as you suggested the last time as I didn't want to see the speed drop.
I'm moving from Premier to BBYW Option 3 on August 19th and should be getting the BT Voyager 2110 router in the next few days so I'm waiting to see if that, along with fitting the new microfilters supplied with it (I hope) makes any difference before attempting to make changes.
As regards synch speeds - It depends whether or not I connect via ethernet or wireless. Wireless averages around 3700 kpbs whereas ethernet is around 5500 kpbs
Just run the BT Speedtester with the following result:
IP profile for your line is - 6000 kbps
DSL connection rate: 448 kbps(UP-STREAM) 7616 kbps(DOWN-STREAM)
Actual IP throughput achieved during the test was - 4799 kbps
Please bear in mind that I'm no whizz kid and sometmes struggle with all the technical jargon used on these forums.
Having said that I'm always grateful for everyone's advice.
Re: Dropping connection
16-08-2007 1:21 PM
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I know no-one wants their speed to drop but in reality with a sync speed like yours at 7616 a drop to say 7000 is not going to be very noticable and may be a small price to pay for a more stable line. You are unlikely to get a sustained IP throughput above 5000 anyway as you can see from your speed test.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
Re: Dropping connection
16-08-2007 1:43 PM
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I'll see how everything goes with the new router first but I'll definitely download that DMT tool.
Re: Dropping connection
16-08-2007 3:14 PM
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It will be interesting to hear your experiences with the new router and filters.
Re: Dropping connection
17-08-2007 5:40 PM
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Tonight should be the true test as last night with my Belkin Router I dropped connection 3 times at 9pm, 10.30pm and 00.53am.
The router stats currently are:
Downstream Upstream
Line Rate 8096 Kbps 448 Kbps
Noise Margin 9.6 dB 22.0 dB
Line Attenuation 27.0 dB 12.5 dB
Output Power 19.8 dBm 11.8 dBm
The BT Speedtester gives the following result:
IP profile for your line is - 6000 kbps
DSL connection rate: 448 kbps(UP-STREAM) 8096 kbps(DOWN-STREAM)
Actual IP throughput achieved during the test was - 5427 kbps
The following was achieved using the ethernet connection
This was achieved by wireless
I'm hoping that all will be well tonight.
Re: Dropping connection
17-08-2007 6:10 PM
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Is that sufficient?
Re: Dropping connection
17-08-2007 11:36 PM
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WEP is regarded as poor (experts can crack it in a very short time); WPA-PSK is better (and WPA2-PSK better than that, but would need an XP patch). I think the 2110 supports WPA-PSK but not WPA2-PSK. Do you have a manual (on the CD?) to check?
Re: Dropping connection
18-08-2007 12:38 AM
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After that comes Format - Hexadecimal digits or ASC11 characters (this one has been pre-selected).
Now we come to the Pre-Shared key box which is empty, What the heck do I put in there? On my Belkin Router I just put in my password and it self generated a key.
Any help would be appreciated?
I didn't bother with putting the CD rom in - I just set everything up from the instructions.
Re: Dropping connection
18-08-2007 1:19 AM
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Go for ASCII characters, easier to enter (and spaces & special characters are permitted).
The pre-shared key is a pass-phrase, anything you like but more secure if you make it a string of unconnected words with the odd typo; "The rain in Spain falls mainly on the plain" is easier to guess once started than "Rain parice chocla%it Che&e@#seburgers albatross". But re-typing that might be difficult, even when you know what it is.
Bear in mind you'll lose wireless connectivity once the change is committed, so best set up using Ethernet. Then the wireless connection will need the same key entering.
Re: Dropping connection
18-08-2007 1:48 AM
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I'll not be tackling this tonight though, too late!! However I will do it whilst connected via ethernet tomorrow and go for WPA-PSK as you say and AES encryption. Will I need to enter the same key on my other laptop when I need to connect via that both for wireless and ethernet?
Incidentally (fingers crossed, touch wood) I have not dropped connection once tonight with this new router.
The SNR did drop down to 6.5 dB at one stage but it held the connection. At the moment it's 7.2 dB so hopefully the change in routers has done the trick.
Re: Dropping connection
18-08-2007 2:24 AM
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Once set on the router *all* wireless connections *must* be set to use the same (new) string. So, yes, you will have to enter the new key for wireless connection on your second laptop. Ethernet isn't affected by the wireless setting, no change is needed there.
That's good news about your connection staying up. You shouldn't have troubles unless SNR margin drops below 6db. I would expect 5.5db to be OK, possibly a bit lower. Some routers hang on and work well below than (even to zero has been claimed). Remember it's SNR margin referred to here, not the SNR itself.
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