Billion 7800N

I am using Cacti, is it possible for you to give me some instructions on how to setup the monitoring of the line errors? I have got SNR, line speed and line attentuation setup.

Thank you.
 
Set it up the same way as the others using these OIDs:

FEC: .1.3.6.1.2.1.10.94.1.1.11.1.3.3
CRC: .1.3.6.1.2.1.10.94.1.1.11.1.4.3


There is also power levels: .1.3.6.1.2.1.10.94.1.1.3.1.7.3

These are all D/S only as the U/S OIDs dont respond.
 
I have now updated to 1.06e. Here are the new stats:

Screenshot2012-02-13at142337.png
 
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Well, after using the Billion 7800N for a few hours, I am ready to give some initial thoughts:

The router is quite large, but the airflow is good and it doesn't get very hot.

The WiFi range is very good and this is due to the three external antennas the Billion 7800N has.

The Billion seems to keep the errors low and it seems to do well when the SNR fluctuates (see the post above).

Tweaking the SNR is very easy through the web interface.

That's it for now, I will post some more updates in a few days.
 
Looks like you are having more luck than I did! Though I am on ADSL2+ rather than ADSL max.

Unless I'm mistaken (happy to be proved wrong) enabling Phyr will do nothing. As this needs to have been implemented upstream and I'm not aware that any providers have adopted it yet.

I'll be interested to hear your experiences re SNRM during the evening / night. Hopefully you don't have a Plasma TV!

Good luck.
 
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Arent you connected at a lower sync speed so higher noise margin than with the Netgear?
 
dmsims said:
Enabling Phyre on my line makes a huge difference to connection stability and lower error rates and thence a higher sync
Click to expand...

From the reading that I've done (no guarantee it's accurate of course):

"Re-transmission technology at the physical layer - and needs to have hardware/firmware at the exchange end that understands the re-transmit request"

A bit like a form of "super interleaving" but without the latency hit (somehow!).

You would have thought if this was the Dogs dangly bits, that it would have been shouted from the tree tops. But if you GOOGLE, there is no real mention of it anywhere. Other than in numerous Broadcom press releases dating back to 2008 and some mention/s of it being "tested/evaluated".

Must admit I never tried switching it on. So can't comment if it would have made any difference to the problems that I had with this modem/router. To late now, as I've sent it back. Life...
 
Router Fan said:
Is it normal for the SNR to drop this much?
Click to expand...

There can be a fair drop during the evening. Depends on your line. Lots of overhead copper wire is usually the culprit.

This is one reason why I was so surprised when I was testing mine. As I only have a VERY short overhead run to a pole and then it dives underground. Every other modem/router that I've tried over the years (since we were BB enabled in 2006 I seem to think) has shown in my case, only a very small drop of around 1dB as dusk approaches. My Speedtouch 585v6 hardly moves at all! The 3dB+ drop in the evening that the 7800N showed, plus it's behaviour when the Plasma TV was switched on, is what kicked this router into touch for me. I notice on the Billion forum, that there are a couple of posts about problems with Plasma TV's and this router. Though on investigation, the Speedtouch does pick up a bit of interference but no where near as bad as the Billion. Why can't life be simple!?
 
As I recall, the SNR on my SpeedTouch did tend to drop at night. I might try it again tomorrow with the Billion as the router just to see if it is any better.

I am ultimately aiming for a 7616Kbps sync. I know it is a little optimistic, but I feel that there is no harm in trying. I mean, people sync at 7616Kbps on 37dB attentuations so I am not that far off.
 
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