connection dropping

davew

davew

davew

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Joined
18 Jan 2004
Posts
594
Location
durham
i've been on bt max now for about 4 months and my connection is always dropping, on average i would say around 4 or 5 times an evening which is a pain if i am doing any online gaming, i've had 3 bt home hubs and have now got a voyager 2500v which is better than the home hub but still drop's the connection.
i've contacted bt loads of times and they can't find anything wrong, here are my router stats, i haven't got a clue whether they are good or not, can anyone see a problem with them or suggest anything i could do :)


Line Mode G.DMT Line State Show Time
Latency Type Interleave Line Up Time 00:00:42:13
Line Coding Trellis On Line Up Count 1

Statistics Downstream Upstream
Line Rate 2336 Kbps 448 Kbps
Noise Margin 15.1 dB 10.0 dB
Line Attenuation 60.0 dB 31.5 dB
Output Power 17.6 dBm 12.3 dBm
K (number of bytes in DMT frame) 74 15
R (number of check bytes in RS code word) 16 16
S (RS code word size in DMT frame) 2 8
D (interleaver depth) 16 4
Super Frames 148969 148967
Super Frame Errors 2 0
RS Words 5064954 1266219
RS Correctable Errors 247 12
RS Uncorrectable Errors 30 0
HEC Errors 2 0
OCD Errors 0 0
LCD Errors 0 0
ES Errors 0 0
 
Hi

Your line attentuation is high,

Have they raised a fault with BT Wholesale at all ?

Have you tried connecting the router to the test port inside your BT master socket? If not you should try this as it will by pass all your interal house wiring

When it drops the connection do you also lose the sync? They will need to know this to raise the correct fault type with BTW
 
no fault has been raised they keep telling me everything checks out ok, i'll try the router at the master socket to see if that make a difference.
sorry i don't know what you mean by does it loose sync, how can i tell ?, all i know is there is a clip from the router it drops the connection and then reconnects again shortly after :)
 
anyone else got any ideas, i've tried the router at the master socket and it's made no difference, today alone the router has dropped the connection 4 times, do you think it's worth complaining to bt about this or is it something i'm just going to have to accept ,i'm on a fairly long line about 5km from exchange. :)
 
:eek: if that line attenuation is right it's well bad. 60dB downstream! You really want it around the 40's below.

You say you tried the Router in the master socket. Did you take the faceplate off the front and connect it inside? You didn't try it plugged into the front did you mate?

If you did try it in the internal test socket, and still had poor stats then it's defo a line problem as it rules out any internal wiring causing an issue.

Cheers. :)
 
the stats that i posted are the ones taken from the face plate and yes that was from the master socket with the face plate removed, BT have done several line tests and always say that everything is testing fine ,do you think the attenuation is so bad because of the line length approx 5km ?
the thing is when i was on 1meg std connection i didn't get any line drops, it's getting silly now i've now had 12 today.

i checked the router stats earlier today and still got a attenuation of 60db, ive just checked again and it's dropped right down :confused:



Line Mode G.DMT Line State Show Time
Latency Type Interleave Line Up Time 00:00:16:44
Line Coding Trellis On Line Up Count 1

Statistics Downstream Upstream
Line Rate 2592 Kbps 448 Kbps
Noise Margin 14.4 dB 11.0 dB
Line Attenuation 15.5 dB 31.0 dB
Output Power 17.9 dBm 12.3 dBm
K (number of bytes in DMT frame) 82 15
R (number of check bytes in RS code word) 16 16
S (RS code word size in DMT frame) 2 8
D (interleaver depth) 16 4
Super Frames 59046 59044
Super Frame Errors 3 0
RS Words 2007576 501874
RS Correctable Errors 120 12
RS Uncorrectable Errors 29 0
HEC Errors 3 0
OCD Errors 0 0
LCD Errors 0 0
ES Errors 0 0
 
Last edited:
Firegod said:
:eek: if that line attenuation is right it's well bad. 60dB downstream! You really want it around the 40's below.
Click to expand...

Well yes, ideally, but the problem is that you have no control over your attenuation - there is absolutely nothing you can do about it. 60db suggests a long line - when I was living at my parents' house their line had a 58db attenuation and I could get approximately a 3000kbps sync out of it. This wasn't a surprise as the line is 5.5km in length.

It's only the SNR that you can do something about and as the OP's SNR is set to 15db, that suggests that the line has had stability problems so the target SNR has been raised in order to try to stabilise the connection.

It's for this reason that I'm a little concerned that your router is reporting two totally different statistics for attenuation - 60db and 15.5db. As I said, the attenuation should never change and if it was ever to change it'd be ever so slight, certainly not that vast. If you're sure your line is around 5km in length then a 60db attenuation is correct - there's no way a line that long can have a 15.5db attenuation.

Do you have access to another router or modem that you can try? Something other than the home hub and the Voyager ...
 
Last edited:
i bet you its a netgear router?

they seems to have a bug reporting 15.5 on longer lines

have you tried updating the router firmware?


attenuation isnt as big factor than snr

i have a 55 attenuation and i sync at nearly 6mb ;)

Download Speed: 4932 kbps (616.5 KB/sec transfer rate)
Upload Speed: 693 kbps (86.6 KB/sec transfer rate)
 
no the router is a bt voyager 2500v, i've just logged on again and the attenuation is back at 60db, the firmware was updated a couple of days ago and it made no difference, i'm gonna call bt again in the morning i'm not interested in speed i would just like the connection to be stable like it was before i went onto bt max.
 
i think your right in calling BT, insist they send someone out, and ask the bt man if u can try another pair aswell.
 
The 15.5dB attenuation is a definite router bug, I've seen it on my belkin 7633.

You do have a long line, on max your noise margin is much lower than on a fixed 1 or 2MB profile. Hence your instability, on a 1MB connection you have noise margin to spare which can absorb fluctuations in noise to a certain degree, with max you are on the 'bleeding edge' most of the time, it doesn't take much to push it over, especially on a long line. You may have been better off staying on a fixed profile.
 
yes i think thats what i'm going to ask them to do ,go back to having a fixed connection, i'm only getting around 1.3meg most of the time anyway and i was getting 1meg before with no connection dropouts.
 
engineer called today and basically told me a load of rubbish he said my downstream line attenuation is 56db which he said was very good for the length of my line which i found out is about 2.5km, i thought it was around 4.5km, he also wasn't happy that the ring wires had been disconnected behind the face plate and said that this was probably why the connection was dropping, i disconnected these wires after reading that they serve no purpose and having them disconnected can sometimes help with noise on the line.
anyway it's no better at all, i rang bt and asked for my mac code but i'm still contracted till October, any idea how i stand with that as they have failed to supply me with a reliable connection.
 
davew said:
engineer called today and basically told me a load of rubbish he said my downstream line attenuation is 56db which he said was very good for the length of my line which i found out is about 2.5km ... he also wasn't happy that the ring wires had been disconnected behind the face plate and said that this was probably why the connection was dropping ...
Click to expand...

Sounds like rubbish to me that does.
 
davew said:
engineer called today and basically told me a load of rubbish he said my downstream line attenuation is 56db which he said was very good for the length of my line which i found out is about 2.5km, i thought it was around 4.5km, he also wasn't happy that the ring wires had been disconnected behind the face plate and said that this was probably why the connection was dropping, i disconnected these wires after reading that they serve no purpose and having them disconnected can sometimes help with noise on the line.
anyway it's no better at all, i rang bt and asked for my mac code but i'm still contracted till October, any idea how i stand with that as they have failed to supply me with a reliable connection.
Click to expand...

Sounds kinda rough that does, I'd ditch BT then, move elsewhere. Perhaps somewhere like you had last time?
 
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