Just received my Billion 7700n router how do i change the SNR ?.


Thanks in advance

Ashley

If it's anything like the 7800N you go to http://<router ip>/snr.html.

Explanation of the values here.

Edited by deleted (Mon 20-Jun-11 16:46:39)

The http link doesn't seem to work on a 7700N, it just gives a blank page?

I used Telnet to adjust the snr on my 7700N. Use the "adsl" command, as explained on the following page.

http://forum.kitz.co.uk/index.php?topic=5195.msg118218

Basically (assuming Windows) ...

Open a DOS shell in Windows
telnet 192.168.1.254 <enter> (on Windows 7 it will need to be enabled first, ask again)
admin <enter>
password <enter> (your normal router password, "admin" again by default)
adsl configure --snr 50 <enter> (for example, see above page)

The router should then re-sync with a lower snr.

Ian

That's too bad. I could never log in via telnet on the 7800. I think my password is probably too funky.

edit: scratch that. Just had a brainwave and PuTTY works fine, unlike Window's built-in client.

Edited by deleted (Mon 20-Jun-11 17:35:31)

Guys, can someone help me out with a easy walk through (tell me how), on how to telnet into my new 7700N, to lower the snr .

Cheers for any help

Sorted , i did not have telnet enabled in windows

Edited by toe (Wed 22-Jun-11 15:53:05)

Following up to my own post.

Using the modem in g.dmt mode, I'd get about 5 drops a day. No obvious reason.

Since using the modem in adsl2 mode, I've not had a drop. This thing holds on like grim death so far.

My downstream attenuation is shown as 66.5dB. My target snr margin is 9dB.

After tweaking the margin down to around 5.5dB, I sync at 2329kbps, which gives me a nice clean 2mbit/s profile.

I'm interleaved, so get quite a few FEC errors... around 85,000 in a 15 minute period at night. however, they are pretty much all corrected automatically, and the number of CRC errors is usually in single digits over 15 minutes.

I'm impressed with this router acting just as a modem so far.

In reply to a post by gyre:

Since using the modem in adsl2 mode, I've not had a drop. This thing holds on like grim death so far.

Sounds very similar to my thinking (so far).

I pushed mine a bit further; aiming for a target SNR of 3dB. After starting on that figure it slowly dropped over the next few days, and mainly nights, and now sits between ~0.2dB (nights) and ~1,0dB (days). The FEC figures at night are often over 1,000,000 in 5 minutes, and the CRC over 100 but the line has stayed up: just over 7 days so far at a sync of 7681.

I've come across a couple of oddities with the stats collection, but the hardware seems quite good.

Ian

In reply to a post by gyre:

I'm interleaved, so get quite a few FEC errors... around 85,000 in a 15 minute period at night. however, they are pretty much all corrected automatically, and the number of CRC errors is usually in single digits over 15 minutes.

I'm impressed with this router acting just as a modem so far.

You almost certainly get the same number of errors whether you're on interleaved or fastpath- the FEC count is those that were corrected, the CRC count is those that couldn't (more or less)

I use the 7800N on FTTC so can't speak about the modem bit, but Billion seem to have produced a good pair of routers.

I had the BT engineer out for another round of lift and shifts. This one seems to have done an excellent job... lowering my attenuation from 68dB to 62dB with a resulting sync increase from 2600kbps to 3600kbs.

Since then... over a week ago... the connection has stayed up rock solid. Well impressed with the 7700N to be honest.

-- gyre --

Are theses snr tweakable via telnet ?