Billion 7800N

mikeo · 15 Feb 2012 at 13:05

Router Fan said:
Stats after half an hour:

How do the stats look?

Fine... but as you say "it's what happens after dusk that matters" and my guess is that with that noise margin, you will be lucky to hold onto the connection! But you never know. Fingers crossed.

PS. I phoned my ISP last night and asked them to switch on Interleaving. I think that should drastically reduce my serious errors. Then all I have to do, is find another modem/router that's not so suseptible to noise interference / noise from my Plasma TV. But what? The Billion looked the best......

Router Fan · 15 Feb 2012 at 13:16

mikeo said:
Fine... but as you say "it's what happens after dusk that matters" and my guess is that with that noise margin, you will be lucky to hold onto the connection! But you never know. Fingers crossed.

I doubt the connection will hold but there is no harm in trying.

By the way, thank you for all your help so far.

Router Fan · 15 Feb 2012 at 14:56

Here is the SNR plot for the last few hours:

Router Fan · 15 Feb 2012 at 18:07

The connection appears to be doing better tonight:

Compared to last night:

Router Fan · 15 Feb 2012 at 18:51

Look at this:

There is hardly any variation at all!

Router Fan · 15 Feb 2012 at 19:10

I have just had one of the "blips" in the SNR margin that seem to be happening on my line recently. Hopefully the SNR will go back up soon. Apart from that, the SNR has hardly dropped at all.

Router Fan · 15 Feb 2012 at 20:14

Apart from the drop (which was caused by some sort of interference between the exchange and me) which brought the SNR down to 2dB, the SNR has actually dropped about 1.1dB which is 2dB more than yesterday!

Router Fan · 15 Feb 2012 at 20:18

Here is a Cacti graph:

Apart from the drop (due to interference) the SNR has hardly dropped at all.

Router Fan · 15 Feb 2012 at 20:20

Here's a larger view:

Router Fan · 15 Feb 2012 at 20:52

The errors are building up:

Router Fan · 15 Feb 2012 at 20:53

I suspect the errors have actually built up because there has been another "blip" with the SNR. I wish I knew what was causing the interference!

Router Fan · 15 Feb 2012 at 21:37

I was starting to get a bit of lag and the errors were building up so I have restarted the router. Strangely, I am at a lower SNR and at a higher sync but the lag is much better.

mikeo · 15 Feb 2012 at 23:04

Router Fan said:
I was starting to get a bit of lag and the errors were building up so I have restarted the router. Strangely, I am at a lower SNR and at a higher sync but the lag is much better.

I said this was a "dark art"

Take my case.... Interleaving now back on and error rate right down. Sync slightly higher, but now appears to be no drop discernible in SNRM when the Plasma TV is on! WTF... starting to wonder if I sent the Billion back prematurely! life :rolleyes:

Router Fan · 16 Feb 2012 at 08:27

After tweaking the SNR down again last night, the Billion stayed connected and it has done amazingly well! Here are the stats:

Router Fan · 16 Feb 2012 at 08:30

The IP profile has also increased to 6.5Mb but Plusnet have their own profile so I'll have to wait for it to match that. The Plusnet speed is currently set at 5.5Mb so that is the maximum speed I can get at the moment.

Router Fan · 16 Feb 2012 at 21:04

I have been doing some more tweaking today just to get the best compromise between speed and stability. I now have got the ping low with a small amount of jitter and the speed seems to be pretty good. Here are the stats, I'll be intersted to here what you think:

dmsims · 16 Feb 2012 at 21:18

For my line that would be too near the edge

SNR is too low

YMMV

Router Fan · 16 Feb 2012 at 21:29

Thanks for responding dmisims. I don't seem to be having any problems with the low SNR. Here is a ping test for example:

I'll let you know if anything changes.

mikeo · 16 Feb 2012 at 21:41

Router Fan said:
Thanks for responding dmisims. I don't seem to be having any problems with the low SNR. Here is a ping test for example:
I'll let you know if anything changes.

Decent ping seen as though you have Interleaving on.

PistolPete · 20 Feb 2012 at 13:44

I have been running 1.06f firmware since Friday as it claimed "Fix issue whereby SNMP doesn't show correct statistics" and behold.... the FEC errors now appear to be outputted correctly. Not convinced CRC errors are correct but I've not had time to look into it properly.

I still have the problem where I can only access the SNMP daemon on the LAN port if "WAN Access" is allowed and I have found another fault in the the Telnet daemon doesn't seem to like the fact that my PC is not on the the same subnet as it's LAN interface - odd at the HTTP daemon doesn't care.

Another ticket to Billion I think.