Billion 7800N -early thoughts

=VTA=MANFACE · 26 Jun 2011 at 15:43

I just tweaked my snr to 25 and have gone from 5Mb to 6.5Mb.

I will use other values to see the fastest and stable snr value.

Love this router.

benftl · 26 Jun 2011 at 15:45

25??? That's far far too high, are you sure you mean SNR?

=VTA=MANFACE · 26 Jun 2011 at 15:54

Was at default -1, changed to 25. It's only first go.

benftl · 26 Jun 2011 at 15:55

tweak it down to 6db ffs

=VTA=MANFACE · 26 Jun 2011 at 16:02

What sort of settings are you talking about ?

bledd · 26 Jun 2011 at 16:17

I've got this router, plugged it in April the 1st ish, and it's been on since. Only downtime is when I updated the firmware

http://www.billion.uk.com/esupport/index.php?/Knowledgebase/List/Index/78/bipac-7800-series

(This came out June 2011)

Here's my stats, I live pretty close to the exchange

DSP Firmware Version A2pB025f.d22k
DMT Status No Defect
Operational Mode G.DMT
Upstream 448
Downstream 8128
SNR Margin(Upstream) 23.0
SNR Margin(Downstream) 9.3
Line Attenuation(Upstream) 5.0
Line Attenuation(Downstream) 6.0

benftl · 26 Jun 2011 at 16:19

6db atten, do you live opposite the exchange?

=VTA=MANFACE · 26 Jun 2011 at 17:11

benftl said:
25??? That's far far too high, are you sure you mean SNR?

Sorry, you misunderstood what I was on about.

I changed the SNR parameters from -1 to 50 in the config page.

This has slightly lowered my SNR from 6.5 to 3.3 (Below 3 and the line becomes unstable.) But has increased my speed from 4.9Mbps to 6.23Mps.

Hope that helps you.

liamcrane · 26 Jun 2011 at 17:17

Nice little explanation here of tweaking the SNR with this router could be worth a look for anyone who is not to sure on what settings to use

http://www.spaldwick.com/broadband/billion-7800n

slipd · 26 Jun 2011 at 23:28

Wow! I can't wait to get my hands on one of these routers

My snr is currently 8db on a 1mb sync, my attenuation is 54db - what sort of target snr should I be looking at and *realistically" what kind of new sync do you think I may achieve?

dmsims · 27 Jun 2011 at 00:02

sam.wheale said:
Wow! I can't wait to get my hands on one of these routers

My snr is currently 8db on a 1mb sync, my attenuation is 54db - what sort of target snr should I be looking at and *realistically" what kind of new sync do you think I may achieve?

That's a very low sync for 54db

slipd · 27 Jun 2011 at 07:23

dmsims said:
That's a very low sync for 54db

Tell me about it

Hoping the the billion will mix things up a bit and give me a bit of stability...

dmsims · 27 Jun 2011 at 08:43

Sam

I think there is something bad happening on your line

Which exchange and how far?
What master socket do you have?
Any internal extensions?
Picture of junction box and above would be useful

Kona* · 27 Jun 2011 at 08:59

I've just ordered a 7800N after my DG834GT has started to reboot itself often, I wanted something modern with a Broadcom ADSL chipset (which I hear this has) and this seemed to tick all the boxes. I live miles away from the exchange and usually sync around 2900 down, 800 up - should be with me tomorrow so I'll let you all know how I get on

Edit: Also, does anyone know the difference between the 7800N, 7800NV6 and 7800GZ? They all appear to be the same model but I want to make sure I'm getting the one with a Broadcom ADSL chipset, anything else is totally useless on my line!

bledd · 27 Jun 2011 at 11:16

I think the 7800N is the UK model, the others are for other parts of the world (I think)

and benftl, Samknows says I live under 100 meters from the exchange

Currently, the exchange only supports up to 8mb though, pita

TaKeN · 27 Jun 2011 at 20:32

Line is playing hell with me in the past couple of days, I'm super confused

ADSL Status
Parameters
DSP Firmware Version A2pB025f.d22k
DMT Status No Defect
Operational Mode G.DMT
Upstream 448
Downstream 8128
SNR Margin(Upstream) 25.0
SNR Margin(Downstream) 14.1
Line Attenuation(Upstream) 13.0
Line Attenuation(Downstream) 19.0

Anyone spot anything alarming? Thanks.

dmsims · 27 Jun 2011 at 20:50

Down sync is low (39% of the theoretical maximum).
Very high SNR at 14 down / 25 up.

TaKeN · 27 Jun 2011 at 21:32

Thanks bud, anything I can do to rectify this?

dmsims · 27 Jun 2011 at 23:01

ISP ?
Which router ?
Error stats from the router if possible
What type of master socket and filter ?
Any extensions ?

TaKeN · 28 Jun 2011 at 08:38

dmsims said:
ISP ? - ADSL 24 Home 30 Package
Which router ? - Billion 7800N
Error stats from the router if possible - Can't seem to locate these, any idea where they are?
What type of master socket and filter ? Master socket is bog standard. Not sure who fitted it, but the line comes into the house via my parents room then is connected to a single socket fixed BT socket/box. No test port is inside this. A Microfilter (from the old router) is fitted to the port, then our telephone line joins to this.

Any extensions ? Extensions to the internal wiring of the house phone line?