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ADSL Broadbands 'drops-out'

Anyone out there had this problem.
Wanadoo broadband and a BT line.
At approx. 3-3.30 pm my broadband connection drops out. It then remains out until the following morning. Had BT check the line outside and inside my house. Wanadoo say everything is okay their end!
I am on the limit of distance from the BT exchange but it works fine until the time stated.
The ADSL light on my Thompson Speedtouch modem remains on, even when the connection has dropped out!
At the end of my tether
help!!! :( :(
 
If you are at the extreme limits for ADSL it may be that extra electrical noise may be causing the problem. Probably at about that time street lights and internal lights come on. Maybe the Central heating goes on. It may be one piece of electrical equipment in your house causing the problem.

Try disconnecting any phones & extension to see if that makes a difference. Try running a seperate extension for your ADSL direct from the master socket. This should carry the ADSL signal only not voice as well. These things may or may not make adifference.

Do you no what your SNR is and the Line Attenuation ?
 
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Scuff said:
Yeh, get BT to boost your line gain anyway. Don't let 'em fob you off.


That will not make any difference other then their is a small chance it will make things worse. The gain only affects the audio frequencies and will have no direct affect on ADSL other then the incresed gain might generate more noise a small proportion of it might spill over into the ADSL frequencies
 
Web Buddy said:
If you are at the extreme limits for ADSL it may be that extra electrical noise may be causing the problem. Probably at about that time street lights and internal lights come on. Maybe the Central heating goes on. It may be one piece of electrical equipment in your house causing the problem.

Try disconnecting any phones & extension to see if that makes a difference. Try running a seperate extension for your ADSL direct from the master socket. This should carry the ADSL signal only not voice as well. These things may or may not make adifference.

Do you no what your SNR is and the Line Attenuation ?

Thanks I'll check those things out, and get back to you
 
WBuddy

Re: Line gain

I beg to differ. I got BT to boost the gain on my line due to my distance from the exchange, and I did notice a jump from 510Kbps to576Kbps, where it remains to this day. I'n only going on what my eyes tell me....................
 
You are clearly mis-interpreting those figures...

576 is the full synch rate with the ATM overhead included. Your modem will always synch at this rate, but never achieve those speeds because it includes the overhead. So clearly you are not talking about real time speeds. Also, you can't be talking about synch rate speeds either because this would never change - it would always be 576 or nothing at all.

The relative gain of the line is applied before the ADSL part in the exchange. That is, when BT increase gain on a line, they simply turn the volume up on the voice part - not the ADSL. This procedure does not affect the ADSL part one bit, since the ADSL is only concerned with exchange to modem, and does not care how loud the voice side is.

To summarize, there is no benefit to be realised regarding ADSL by asking BT to increase gain. It does not improve the medium ADSL uses, it only increases the sound of the voice side.
 
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chris loco

My ignorance fails me. How does the BT exchange differential between the audio and the adsl data?
 
There are two essential components in the exchange. First, the voice concentrator. This produces usable dial tone and transcieves on audio frequencies.

The second part is the DSLAM. This takes in the output from the conc. then filters it, and then adds ADSL signal on top of it, and sends the composite signal out to your home. You pick up the composite, filter it, send the dsl to your modem, and the audio to your phone. Voila.

These two parts are completely seperate and operate completely independently of one another. Indeed, the DSLAM has only been in existance in most BT exchanges since the advent of ADSL in the uk.


So.....Voice....DSLAM....LINE....LINE.....Homefilter....modem...voice.

As you can see, the voice part in the exchange can be turned up, down, or even off altogether and it would have no bearing whatsoever upon the dsl function.
 
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Pablo, I used to have more or less the exact same problem.

The timing varied, but there was a definite pattern. Earlier in the winter, later in the summer. It broadly tracked dusk - which I guessed as others have noted here was something outside of the house - e.g. streetlights interferring with my line at the time.

Many trips by BT engineers, whos usual response was "er.. it doesn't work does it.., you're too far from exchange.." (5.1km) - and off they'd go. All they did was look at Signal-to-Noise Ratio and packed there bags basically.

I had to live with the outage.

However, in last 6 months or so there has been a big improvement - I know not why. My SNR figure is still appauling - ranging from 0.5 to max of 4.3.

I recently asked for upgrade - in part because I thought it might flush out problems and in part I thought I might actually get > 512k.
Alas, complete failure and had to regrade back to 512k - and back to old crap SNR - but mostly ok - I still get regular (short) outages, but mostly acceptable.


However*2 - this weekend - I visited a neighbour (below) and tried my adsl modem on their line and they had a SNR of 12.0 ! 3x my max.
I think that clearly means it is not purely a distance from exchange thing, and BT have wittingly or unwittingly (I'd bet later) been fobbing me off.

I have raise the issue with my ISP who have inturn raised with BT today..
I will see if fruitful - judging by BT's engineers inept performance to date, I don't hold much hope..
 
marmite said:
However*2 - this weekend - I visited a neighbour (below) and tried my adsl modem on their line and they had a SNR of 12.0 ! 3x my max.
I think that clearly means it is not purely a distance from exchange thing, and BT have wittingly or unwittingly (I'd bet later) been fobbing me off.

I have raise the issue with my ISP who have inturn raised with BT today..
I will see if fruitful - judging by BT's engineers inept performance to date, I don't hold much hope..

Why not ask if the neighbour they will let the BT engineer see their SNR to prove its not the distance from the exchange thats the problem but the BT connection that has a problem.
 
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