In reply to a post by WWWombat:

Here's a before & after set of snapshot graphs:-
http://i.imgbox.com/ackiwNN4.gif

How did you make those? I'd like to try the same!

If you're on Windows 7 you can do a very similar thing to easily step through your graphs day by day.

Navigate to the Current Stats or On-going Stats folder, whichever contains the graphs you want to view, so if you wanted hlog then naviagate to Current_Stats folder, so you can see all the sub folders.

Now type Hlog in the search box, and then save the search.

Then just double click the first picture and you can move through them, just like that Gif. There are plenty of online places you can make animated gifs, or I think there may be a plugin for paint.net.

My searches get saved to my Favorites, so it's just case of clicking the search, making sure they are sorted by filename and then viewing.

This doesn't work so well with the Bits graph as we have two for each one, normal and high res.

When my connection changed to fast path recently, my attainable went from around 50 to 47, I'm still on the new firmware.

Hi Bald_Eagle,
Do you think yours is a similar problem to the one we discussed here? - http://forums.thinkbroadband.com/fibre/t/4218198-int...

In reply to a post by smouty:

Do you think yours is a similar problem to the one we discussed here?

Yes, no, maybe - I don't know


I did notice that mains power in the area where I live 'blipped' this morning, causing the house lights to go off & the PC's amplified speakers made a noise for less than 1 second.

The PC, electronic clocks, TV & the HG612 didn't switch off, but the Netgear router did disconnect/reconnect.

From the HG612's own log:-

2013-5-14 7:19:13 Debug 104500 LAN1 up
2013-5-14 7:19:10 Debug 104500 LAN2 up
2013-5-14 7:19:8 Debug 104500 LAN1 down
2013-5-14 7:19:8 Debug 104500 LAN2 down

By pure chance I had the HG612's GUI open at the time & noticed for just a few seconds that DS SNRM shot up to 10.3dB & Attainable Rate was almost 28Mb before it returned to 6.3dB & 21128Kbps.

Unfortunately, as this happened between scheduled data harvests I don't have the relevant stats & it was that brief I didn't get change to grab a screenshot or force a snapshot data harvest.

I can only assume that other users' routers/modems also disconnected & I was able to see no or vastly reduced interference on my own connection before they all reconnected.

I really would have loved to have seen a QLN graph at that time.

On my way to work I did also see some contractors carrying out some work to a road crossing not far from the cabinet. Electrical company lorries were parked at the roadside at the time.

Coincidence? - Maybe.

It would be interesting to see what happens during a power cut, mines all hooked up to a UPS so will carry on logging for about half an hour until it all gracefully shuts down. Trouble is (luckily) we don't have power cuts very often now - must be years since the last one here.

Although not directly related, we had a power cut here 5 days back that took out a wide area. Like you I'm on a UPS so RouterStats keeps running for a while. Very surprised to see below which I guess is less the ambient noise + crosstalk? Line is ADSL2+, 2.9km/39dB from exchange and normally runs consistently at 9-10Mb/s at 3dB or so depending on how I have the SNR Margin set.

RouterStats with Power Cut

A bit longer ago, I came across a fallen power line (insulated) across a footpath and reported it. Local energy co cut the power to just this part of the village area for it to be sorted which gave an improvement of around 4dB in the SNR margin.

Unfortunately, I had been out for this one and got back to find the UPS announcing it was about to run out of juice, managed to save the current RS graph above but no time to reconnect and see what fantastic connection speed I could manage with another 9dB! The route between myself and the exchange is pretty well all residential plus shops, no heavy industry.

Edit: there is about 0.3dB noise in the house from various domestic things, established during major problems about a year ago. The equipment in my workroom adds about another 0.2dB.

Edited by tbailey2 (Wed 15-May-13 10:31:59)

In reply to a post by tbailey2:

Although not directly related, we had a power cut here 5 days back that took out a wide area. Like you I'm on a UPS so RouterStats keeps running for a while. Very surprised to see below which I guess is less the ambient noise + crosstalk? Line is ADSL2+, 2.9km/39dB from exchange and normally runs consistently at 9-10Mb/s at 3dB or so depending on how I have the SNR Margin set.

RouterStats with Power Cut

That certainly shows how much noise there can be in the vicinity. However, knowing how noisy some UPSs can be - radiated and transmitted, I wonder how much of that noise is from the UPS. There is the conversion from 230v down to the battery charging voltage which will be running continually and then when the battery is supplying power the up-conversion.

Have you tried running with the UPS input turned off? With the modem connected to a normal mains supply with UPS running? and with UPS off?

you can maybe guess what 9db would have gave you by looking at attainable stats.

When my line last jumped to 85+ attainable I did a force resync to get a 79999 sync, when the crosstalk returned I had the 79999 sync with a 3db snrm, sadly it didnt last long due to DLM fiddling with my upstream power.

So on my line 3db of snrm is around 7mbit sync speed. I thought was 14-15 before but calculated wrong as I based it on the attainable jump from 72 to 85-86 but forgot to account that on the 79999 sync there was also a jump of snrm to 9db. So when the attainable reverted with the crosstalk returned it went from around 9db to 3db. 6 db drop for loss of approx 14mbit attainable.

MHC
Yes, but a long time ago and couldn't see much difference then and the UPS has been changed since (APC 1500W). If that was mostly UPS noise, then I wonder what the connection speed would be? The current attainable is 13308 @ 3.3dB with actual d/l 11303. Over the past few weeks looking at RS graphs each 2dB of extra noise margin is worth about 1Mb/s d/l increase (if I reset the SNR Margin via the router to what it was) so 7dB could mean an extra 3.5Mb/s !! I think not...

However, I'll try that UPS test again when I get a moment.

Edit: corrected figs!!

Edited by tbailey2 (Wed 15-May-13 13:54:40)

In reply to a post by MHC:

Have you tried running with the UPS input turned off? With the modem connected to a normal mains supply with UPS running? and with UPS off?

Well doesn't seem to be much contribution from the UPS under normal conditions.

Went through the combinations and, allowing for the effects of the router rebooting (disconnected the sessions first though) the only detrimental effect I could see was when pulling the mains on the UPS so it was running on actively upconverted battery power. There was then a drop of about 0.3dB in the SNR Margin which came back as soon as it was on mains power again.

Running everything entirely on mains really was no different. After a few tests, I did end up with ~300k more d/l than when I started though! Probably because the SNR Margin was higher when I did this than the last time I played around.

Only downside was my Latency has gone up by about 5ms as the interleave is back on upload, it was on fastpath. DLM removed it a couple of days back and that dropped the ping times.

When I started the speeds were 11303/1072 @ 3.4dB with an attainable of 13308
On mains only 11460/1082 @ 3.1dB with an attainable of 13612
After tests back on UPS (but not active) power, 11585/1080 with an attainable of 13724

So somewhere out there is another ~2000kb/s if I could find it.

Doesn't really matter too much though as there is now a shiny new FTTC cab next to my current cab that I gather from an OpenReach guy has power and fibre but isn't active yet.

STREET SIDE DSLAM CAB NNAHWF, COLLEGE LANE, HURSTPIERPOINT, HASSOCKS, BN6 9AB on Exchange HURSTPIERPOINT is served by Cabinet 4

Sounds like a nice quiet UPS ...

There is something close to you that is not very quiet though.