Does anyone know if it's possible for Orange to re-route an LLU customer's service through another LLU exchange temporarily ? Logically it's not because of the BT phone line.
I normally get a downstream attenuation of 39.5, noise margin of 6 with a steady speed 5600 to 5800.
Then now and again it changes with attenuation going to over 40, noise margin down to around 3 and speed down to anywhere between 2000 to 4000. But then it always reverts to the norm.
The actual broadband signal cannot be re-routed as such, it goes to one exchange and either into BT equipment or LLU equipment and doesn't get routed around. Normally your attenuation should stay pretty steady.
If it keeps changing it does suggest some sort of intermittant problem somewhere but depending where it may be hard to track down.
I normally get a downstream attenuation of 39.5, noise margin of 6 with a steady speed 5600 to 5800.
Then now and again it changes with attenuation going to over 40, noise margin down to around 3 and speed down to anywhere between 2000 to 4000. But then it always reverts to the norm.
When you say attenuation goes to over 40, by how much. Expect attenuation to rise/fall dependant on temperature, more so if you have lots of overhead cabling. Should however remain within 1 to2dB of the 39.9 you mention. If you are normally working with a noise margin of 6dB then you are right on the point where any reduction in noise margin is a potential for reduced speeds. Again does this happen at night where noise becomes more prevelant. Any large fluctations in attenuation and noise are more likely to be down to your line and equipment.
I've seen 45.
DMT shows me that at 10:45 today SNR dropped steadily from 7.4 to the low 6's it is at the moment.
Variations happen more during the day than >6pm.
ADSL Internet Settings
Type Fast
Status No Defect
Downstream Upstream
Data rate 6624 288
Noise margin 6.2 31.0
Output power 19.6 10.2
Attenuation 39.5 19.5
Currently syncing at 5688 / 250 with latency 197ms
Same programs running, BT line did not ring....nothing happened except normal service resumed.....any clues ?
I'm still of the opinion that Orange engineers are making changes because it always occurs during the day when they would be working rather than after 6pm and usually lasts between 1 and 4 hours.
This morning I'm back to under 2000 with SNR = 3.3; ATT = 39.5 with high latency, I saw around 500ms at one point
What is is clear is that each time it has happened as highlighted over the past two days, the attenuation has remained static. Its just been the SNR thats taken a dive. It could be down to exchange or Orange based equipment but pretty much remote possibilty. Noise problems of that sort are more likely to be induced on the line or within the house.
Any strange happenings going on locally. Ie workman with generators, machinery,etc., By local I mean any location to your line between house and exchange which may make it difficult to answer this. Also, any neighbours bought any electrical equipment lately. There was a case some time ago where a broadband customers next door neighbour bought an electric treadmill. Everytime the treadmill was switched on the broadband went haywire. Turned out the motor was not suffiently suppressed causing massive interference and noise to be induced into the line.
But surely the high latency results aren't line or house induced ? SNR I appreciate could be but not necessarily.
The only mods. I've not tried is disconnecting the BT box ring wire or fitting an ADSL faceplate. But why should this suddenly make an effect.
To my knowledge there is no work going on in the area and SSDOW was LLU'd back in 2005 so unless Orange are replacing/updating equipment (which they have denied) I can't understand why this is happening. Currently my speed is 1344 with 3.4 SNR.
I may ask BT if they can do a fault test between 9am and 5pm.
Disconnected all wires except 2 and 5 in the BT box :-
Connected at 5357; attenuation = 40 SNR = 10.9
So it could be the line house side of the BT box......Cat 5e/6 cable might be another improvement.
I still can't think why it's suddenly started affecting the service though.
well, I think that increase and improvement in SNR is significant. Wires, components, etc can come loose over time. Might be worth leaving router connected directly to master socket and seein whether problem reoccurs.
well, I think that increase and improvement in SNR is significant. Wires, components, etc can come loose over time. Might be worth leaving router connected directly to master socket and seein whether problem reoccurs.
Yes, I will try that because the router is currently plugged into a wired BT extension (also 2 and 5 wires only). That's why I'm considering a CAT5e/6 cable.
Also DMT is showing a significant decrease in CRC and ES errors.
But I'm still puzzled as to why it suddenly started.
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