Another reduced speed query
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- Another reduced speed query
Another reduced speed query
25-11-2009 6:21 PM
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Since I had broadband I have had about a 2MBit connection, probably due to the distance (I live on one side of cheltenham, the exchange is on the other). This seemed ok with the odd disconnection, while annoying, we just worked around. Now since 7pm last night I have had sync speeds of somewhere between 1MBit and 2MBit. I usually sync at 2600 to 3000 but profiled down to 2MBit (as I would expect). The only thing I have noticed is that my SNR is now 16db instead of 9 or 9.5db. Is there anything I can do get my 2MBit back. I can give stats (I run routerstats constantly, logging my connection stats) if required (that's why I knew when my problems started).
Now I was just going to post the above but I just read "I'd hope to see something like the attached". (And the attched picture showed a smooth SNR graph). Now my SNR graph contains many many drops (I just counted 9 greater than 3db drops in an hour graph) and I'm wondering if I have a line fault. Now I only have a DECT phone (No corded phone, sorry) and did a BT quiet line test but if I was to hear any crackle or hiss, there was hiss but it was very faint with my DECT phone volume on full. I don't trust that as the DECT phone could be causing the hiss. I'm buying a corded phone tonight to check again later on. I have even changed routerstats to check at 5 second intervals with a phone on my shoulder to see if I can hear anything but so far no luck. If I can't hear any problems, then BT won't hear anything and will charge for the visit if I get them in.
Now at the moment I am getting 1MBit which, for me, is not good enough to do the things I like to do (I did a good piece of university work on IPlayer and ITVPlayer so you can see what I like to do with my connection).
What I want is the fastest broadband available on my line... and I know that 1MBit is not the fastest it could be.
Can someone help?
Re: Another reduced speed query
26-11-2009 8:14 AM
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only just spotted your post. If you use the Reply button when replying (rather than Quick reply), then below the box you'll see an Additional options button. You can browse to the folder where you've saved any pictures, etc and then attach them to you post.
Well you seem to be doing all the right kind of checks, and it's always best to double check your phone line for noise with a corded phone but it sounds like the very faint hiss is fine. Keep checking the line for crackles and other intermittent noises though.
Here's a tip for when you're doing further tests - When you need to swap things around for testing, powerdown your modem/router and wait several minutes before unplugging anything that disconnects it from the line eg. it's cable, the filter, master faceplate etc. Don't do this more than 5 times in an hour, and then leave it alone for the rest of the day. This is to help prevent the exchange DLM from thinking you have an intermittent line problem.
If you can post the full ADSL line stats from your modem/router (sync, attenuation, SNRM, power - down & up) and a RouterStats Noise Margin Graph or 2, we'll see what other advice could be given.
Re: Another reduced speed query
26-11-2009 10:58 AM
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Re: Another reduced speed query
26-11-2009 5:08 PM
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If I were to take out a savings account and six months later check out the interest its paying I would find that its paying a lot less than the new accounts. I suppose this idea would have been ridiculous when it first started happening, now its the norm.
Re: Another reduced speed query
26-11-2009 5:34 PM
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Re: Another reduced speed query
26-11-2009 6:39 PM
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Now I've got a proper corded phone(£4.50 from Argos) and can't hear any crackles on the line but I do hear a little hiss on the line. I'm not sure if that's a fault or not. I do get about 3 reconnections a day, so I have to keep my eye on the sync speed to make sure that my time on 500k or less is as short as possible.
On the whole master socket front, I have none. I live in a flat that was built a few years ago (2005) and all the phone sockets (I have four) are silver sockets (like the light switches) and none are BT style master sockets. I would be testing from the master if I had one. I suspect that the master socket is outside the flat.
On the powerdown problem. To check the line I plugged an old BT Voyager 2110 router to the line. Now that crashes while plugged in (even with 3.30r firmware) and is unusable after about 30 minutes (I'm suspecting that the line . In trying to see if I could improve my time on the voyager, I did keep restarting it so some restarts recently are from that.
Current stats from router:
Uptime: 0 days, 0:06:22
DSL Type: G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 1,888
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 11.5 / 17.5
Line Attenuation (Up/Down) [dB]: 26.0 / 42.0
SN Margin (Up/Down) [dB]: 22.0 / 15.5
Vendor ID (Local/Remote): TMMB / ALCB
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 1 / 0
FEC Errors (Up/Down): 0 / 39,393
CRC Errors (Up/Down): 0 / 114
HEC Errors (Up/Down): 0 / 25
I'm noting the SN Margin number (It used to be 9-10db, now it's 15-17db). I don't have routerstats for when the 500k bit happened.
I have picked a point when I am not in the house as an example of my routerstats output. I will point out that this is at 5 second sampling of router. (First Pic, ...1930.jpg)
The second pic is when the router was sampled at default routerstats rate. Same day. (...0845.jpg). Again, I was out of the house at the time.
Re: Another reduced speed query
26-11-2009 7:04 PM
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Keep checking that phone line. If you don't hear anything crackling when those dips are happening then you're going to need to do some checks.
That very faint hiss shouldn't be a problem.
If you don't here any crackles, then powerdown so you can try another filter, but whilst you are powered down, unscrew each of your phone face-plates and have a look behind. One should have a yellow sausage shaped capacitor and two other components, a surge arrestor & a resistor, the others should not. Also note the colour of the wires on each terminal and the number of the terminal and how many wires on each terminal.
The one with the capacitor is the master, but try the master after the filter swap if the problem carries on, unless you happen to be using it already!
Only swap one thing at a time, otherwise you won't know which the cause was if it goes away.
If still no luck, borrow another modem/router if your voyager won't behave. PN can lend you one if you can't borrow one from a friend.
Re: Another reduced speed query
26-11-2009 9:20 PM
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Re: Another reduced speed query
27-11-2009 6:15 PM
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If someone at Plusnet could kick my profile to 1500k it would be appreciated.
Noise graph still strange. Will continue to monitor situation.
Any suggestions gratefully appreciated.
Noise graph of last two hours posted.
Re: Another reduced speed query
27-11-2009 11:31 PM
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Anyway, If the line improves then I will ask to see if my SNR target can be dropped.
Re: Another reduced speed query
28-11-2009 12:03 AM
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The reason for asking you to look at and report about your wiring was because you don't have an NTE5a Master Linebox, your wiring can't be isolated and so eliminated as a major factor in your problems which I believe it is. Again I'll remind you about powering down when you want to disconnect or swap or reboot etc. otherwise the exchange Dynamic Line Management will continue to think you have a more severe problem as I mentioned in reply #1.
Another thing worth a mention here is when/if you need to powerdown disconnect/reboot, try to do it between 0900 -1430 when noise levels should be lower, and you then may get a better sync speed.
Re: Another reduced speed query
28-11-2009 9:45 AM
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Re: Another reduced speed query
28-11-2009 10:28 AM
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If you have a digital camera, a clear photo of the wiring at the back of the master would be a great help.
Re: Another reduced speed query
28-11-2009 10:37 AM
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Re: Another reduced speed query
28-11-2009 8:59 PM
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