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Standard User pipexbob
(newbie) Mon 27-Jun-11 08:53:31
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Re: Billion 7700N vs 7800N


[re: baby_frogmella] [link to this post]
 
Hi. On the 7800n if you navigate to http://{normal ip address of router}/snr.cgi this enables you to do a tweak. Be careful of the values you put in here. I saw a table at the Spaldwick village site telling you how to tweak it, but I never tried...http://www.spaldwick.com/broadband/billion-7800n

I have a 7800n but it is currently being trained on ADSL2+, so it would be pointless for me to quote figures from it..

Bob (now with Plusnet NOT Pipex)
Standard User b4dger
(knowledge is power) Mon 27-Jun-11 10:52:21
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Re: Billion 7700N vs 7800N


[re: Anonymous] [link to this post]
 
Any line under around 40db Attenuation is nice and short to me smile




You're also lucky not to have to worry about BT's crazy line management! wink

Edited by b4dger (Mon 27-Jun-11 10:54:16)

Standard User baby_frogmella
(committed) Mon 27-Jun-11 13:37:46
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Re: Billion 7700N vs 7800N


[re: pipexbob] [link to this post]
 
In reply to a post by pipexbob:
Hi. On the 7800n if you navigate to http://{normal ip address of router}/snr.cgi this enables you to do a tweak. Be careful of the values you put in here. I saw a table at the Spaldwick village site telling you how to tweak it, but I never tried...http://www.spaldwick.com/broadband/billion-7800n

I have a 7800n but it is currently being trained on ADSL2+, so it would be pointless for me to quote figures from it..

Bob (now with Plusnet NOT Pipex)


The OP was asking if you could alter the SNR through the software on the 7700N which you can't frown

TalkTalk Plus LLU ADSL2+ connected @ 17612/1019 kbps
Attenuation 27db down / 9db up
Noise Margin 3.3 db down / 12db up
Powered by Billion BiPAC 7800N


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Standard User gyre
(committed) Mon 27-Jun-11 16:23:53
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Re: Billion 7700N vs 7800N


[re: baby_frogmella] [link to this post]
 
Depends on what you mean by software. You can't yet seem to do it from the built in web server on the 7700n, but you can do it from the built in telnet server. And it survives a reboot if you've saved your adsl profile.

I do someting like this:

telnet 192.168.1.254
adsl configure --snr 30
adsl config --save
quit

Now, there might well be a hidden web page which allows this instead of telnet. I've just not found it yet smile

-- gyre --

plusnet via Draytek Vigor 2920 and Billion BiPAC 7700N (bridged)
Standard User gouledw
(newbie) Mon 27-Jun-11 16:59:14
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Re: Billion 7700N vs 7800N


[re: gyre] [link to this post]
 
So for example, and thanks gyre and all the other's for the advice, but what I was thinking is my line is currently set at an SNR of 9dB because our current router keeps resetting so it increased it. And Im gonna get it to 6dB using my contact in BT, would it hold as the SNR usually drops to 3dB in the evening.
Standard User gyre
(committed) Mon 27-Jun-11 17:29:20
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Re: Billion 7700N vs 7800N


[re: gouledw] [link to this post]
 
If you're saying that with your current router, your line drops from 9dB to 3dB in the evening... that's a pretty huge drop.

I've seen 2 or 3dB, but not usually 6dB of drop.

If you already have a 7700N, you can experiment for yourself before your BT contact gives you a target snr margin of 6dB, by tweaking it during the day using telnet until you get 6dB, then leaving it and checking periodically what the margin is in the evening.

On my line, I have a target snr margin of 9dB, I've tweaked it down to about 5.5dB and it hasn't dropped below 4.5dB yet at any time of the day. But then, everybody's lines are different.

-- gyre --

plusnet via Draytek Vigor 2920 and Billion BiPAC 7700N (bridged)
Standard User gouledw
(newbie) Mon 27-Jun-11 17:41:20
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Re: Billion 7700N vs 7800N


[re: gyre] [link to this post]
 
On my line because our Business Hub is faulty, (the lightning did it! blush ) it keeps resetting and now we have a good line speed, the DLM decided to increase the SNR to 9dB frown I used to get a sync of 2692 and now I only get just over 2100.

Broadband Status
VPI: 0
VCI: 38
Broadband Negotiated Mode: G.DMT Annex A
Connection Status: CONNECTED
Speed (down/up): 2112 Kbps/448 Kbps
Number of Retrains: 0
Number of Retrains Elapsed Time: 0H: 00M: 00S
SNR Margin (Downstream/Upstream): 9.0 dB/12.0 dB
Attenuation (Downstream/Upstream): 63.0 dB/31.5 dB
Anonymous
(Unregistered)Fri 29-Jul-11 19:13:19
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Re: Billion 7700N vs 7800N


[re: gyre] [link to this post]
 
In reply to a post by gyre:
Depends on what you mean by software. You can't yet seem to do it from the built in web server on the 7700n, but you can do it from the built in telnet server. And it survives a reboot if you've saved your adsl profile.

I do someting like this:

telnet 192.168.1.254
adsl configure --snr 30
adsl config --save <<<< Invalid command
quit

Now, there might well be a hidden web page which allows this instead of telnet. I've just not found it yet smile

-- gyre --
Standard User gyre
(committed) Fri 29-Jul-11 19:25:28
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Re: Billion 7700N vs 7800N


[re: Anonymous] [link to this post]
 
Sorry, brain faster than fingers. Try:

adsl profile --save

smile

-- gyre --

plusnet via Draytek Vigor 2920 and Billion BiPAC 7700N (bridged)
Anonymous
(Unregistered)Fri 29-Jul-11 20:06:42
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Re: Billion 7700N vs 7800N


[re: gyre] [link to this post]
 
Do you know how to set annex-l via telnet?

it seems if you save the profile after setting the snr value it re-enables all the other modulation types.
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