Am I going to be unhappy ?
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Re: Am I going to be unhappy ?
23-05-2012 11:21 AM
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What do think of the Noise margin spikes that are happening as per the attachments? Any explanation?
Re: Am I going to be unhappy ?
23-05-2012 4:50 PM
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The spikes seem a bit random, so I would be making wild guesses at the moment.
The Noise Margin scale, Rx Noise Minimum value needs setting to 0 rather than 1. Also the plots haven't got the sync speed and Noise Margin at the top - I think that's the two bottom Overlay options on the Graphs - Capture Properties tabs.
There's something horrible going on with the image size, possibly because you have quite a large screen. Instead of maximising the Routerstats window, try just grabbing the corner and dragging it out to say half screen size.
Have a tinker with RouterStats and see if you can get it to Telnet the Netgear nicely, we could have a look at the Bitloading Bits/tone graph then and see if that gives us any clues.
Re: Am I going to be unhappy ?
23-05-2012 5:19 PM
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Re: Am I going to be unhappy ?
23-05-2012 6:09 PM
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You've got something very strange with your graph settings. The overlay at the top is showing the noise margin as zero, and instead of sync speed it's showing the attenuation up and down - mind you those figures had me rushing off to look at the stats you posted yesterday the upstream attenuation reading 15.5dB is a bug I haven't seen in a long time, quite common with that vintage of Broadcom chipset - I am assuming it's a v4?
To try the Telnet, you've got to set things up on the Telnet (very RH) tab on the Configuration (Gear) icon.
Oh and I forgot to answer the query yesterday (reply #113) when you asked if the resync the day before at 1305 was possibly the phonecall taken by the answer machine - which I thought I'd said it might be - you'd subsequently changed the filter and I said mark the one you took out as suspect (just in case).
Re: Am I going to be unhappy ?
23-05-2012 8:39 PM
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Re: Am I going to be unhappy ?
23-05-2012 9:31 PM
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Any luck with the Bits/tone graph? I see from the stats that the Noise Margin is still strangely at 5dB. What are the Noise Margin graphs looking like?
Re: Am I going to be unhappy ?
24-05-2012 2:12 PM
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I just dont understand what is going on. Routerstat was not running so I dont have graphs etc.
Do I need PN to do a resync? Running out of patience although I fully appreciate I am only on PN for 8 days and Chris did a resync end of last week, but had been expecting some kind of stability by now, preferably in the higher setting and Rx Sync rate.
Re: Am I going to be unhappy ?
24-05-2012 3:19 PM
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The downstream noise margin is up to 9, which accounts for the lower sync speed.
Re: Am I going to be unhappy ?
24-05-2012 3:29 PM
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Re: Am I going to be unhappy ?
24-05-2012 6:08 PM
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Question: If I have resyncs during "Training" period, does each resync require another 10 days? This coming Sat/Sunday will be 10 days, so do I look at my connection details then, and have to live with whatever is shown?
Thanks
Re: Am I going to be unhappy ?
25-05-2012 1:27 PM
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A couple of disconnections won't do you any harm. Your 10 days start from your first connection so any further resyncs won't change that.
Jojo
Re: Am I going to be unhappy ?
25-05-2012 4:13 PM
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Look forward to your response. Thanks.
Re: Am I going to be unhappy ?
25-05-2012 4:31 PM
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There's not a great deal we can do while it's in the training period. So, on Monday I'll be able to dig a bit more and see what we can do to get the best out of your line.
Jojo
Re: Am I going to be unhappy ?
26-05-2012 10:11 AM
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Your training period finishes 10 days from the last line reset, so that will be next Tuesday as the line was reset on the 19th if you remember, you had such an appalling profile at the time so the line was reset to improve that.
Unfortunately the Target Noise Margin seems to be sitting at 9dB instead of 6dB which is going to give you these slower speeds at the moment.
There is something happening that's causing more frequent disconnects than just DLM doing it's thing - this could be several things,
- a line fault having developed, which could have been present for a while, possibly intermittent, (from before you moved even) and has got progressively worse
- problems with power dips which would cause a modem/router reboot and hence a resync - this could again be a more recent development (I used to be plagued by them until I put the modem/router on a UPS)
- something different locally that is causing interference spikes, either travelling up the mains or being picked up by your line.
If you can keep Routerstats running (especially over time slots where there seems to be most problems) and post SNR graphs periodically, that may help to identify any pattern and give some indication as to the type of problem.
Have you got some recent ones showing any fluctuations?
PS. I'm guessing that the Telnetting into the v3 isn't capable of getting the Bits/tone plots (or SNR graphs) with it's chipset and current firmware so stick to the convention http: access for the SNR (and sync plots when appropriate) and stats.
- can you check that is definitely the latest and correct version of firmware for your model? and I'll look into any other possibilities.
Oh. and just so as you don't jump on the wrong bandwagon, this is not related to your Plusnet connection, it's either line, exchange equipment or a local factor all of which as not ISP specific.
Re: Am I going to be unhappy ?
26-05-2012 11:18 AM
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cat /proc/avalanche/avsar_bit_allocation_table
There's some kind of SNR per tone in /proc/avalanche/avsar_rxsnr0 (and /proc/avalanche/avsar_rxsnr1 and /proc/avalanche/avsar_rxsnr2) but I don't know how to assign units to those very raw values.
It should even possible to enable higher precision stats, but I've not tried it because it's easier to enable than disable and I suppose it might mess up the web interface.
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