6dB SNR

meaz · 11 Feb 2006 at 01:17

Hi all,

Lately I've been having problems with my pipex adsl. It used to have a downstream SNR of about 20dB, recently its gone down to 6 and that's with the phone off the hook. With the phone down the line won't even sync at all 99% of the time.

Has anyone heard of this before or know what the problem might be?

(have tried different micro filters, different modem/router)

Thanks for any help,
meaz

Bond · 11 Feb 2006 at 09:22

Have you tried removing the lower half of the face plate on the BT Master socket and then plugging the router/modem directly into the test socket? This will remove the internal wiring frm the equation. Post back the figures your getting from test socket

gam3r · 11 Feb 2006 at 10:20

Thats only if you have a new NTE5 faceplate

tolien · 11 Feb 2006 at 11:11

If you don't have an NTE5, then disconnect all your extensions. Same end result.
If it's still the same, report a fault with your ISP.

derbyjake · 11 Feb 2006 at 11:31

earthign fault more then likely

gam3r · 11 Feb 2006 at 11:38

Or you could try the ringwire trick which removes the uneeded ringwire as which was used for old BT steam telephones ringing. Read this for more detail.

http://yarwell.blogspot.com/2005/08/adsl-tweaking.html

OllyM · 11 Feb 2006 at 11:52

If it's not syncing when the phone's down it sounds like a high resistance fault - phone Pipex and insist they get a BT engineer out.

gam3r said:
Thats only if you have a new NTE5 faceplate

New NTE5 faceplate? NTE5 master sockets have been fitted for nearly 20 years, and you don't need a filtered faceplate to test things from the test socket.

WOMBATWILSON · 11 Feb 2006 at 13:45

have you contacted bt for them to test the line?

meaz · 11 Feb 2006 at 15:31

Thanks for the replies.

I dont have that faceplate, I've got an old line.

Ive tried plugging it into the master socket with no phones plugged in and it was the same. I called pipex they asked me to do the bt_startup_domain account line drop test, so I did that and the details of the disconects were passed to them and they are getting onto bt to send an engineer out. BT say the phone side of it seems fine from there side.

Think I'll wait till an engineer is out and not try that wiring trick as the connection works fine when the phone is off the hook (14db snr) that's at best though, last night it was 6db with phone off the hook but it doesn't lose sync.

regards,
meaz

OllyM · 11 Feb 2006 at 17:10

Sounds very like a HR fault, the BT engineer should spot it straight away when he visits.

meaz · 13 Feb 2006 at 09:26

yeh he did, he put a new junction box in as the connections in the old one were corroded. seems to have done the job.

meaz

gam3r · 13 Feb 2006 at 11:27

Nice, what SNR do you get now?

meaz · 13 Feb 2006 at 14:34

The line was completely dead on saturday afternoon with no dial tone.
Now I get 27.5dB SNR downstream and 27.0dB upstream. BT Turned up at 8.30 and it was fixed in 15 minutes, which was surprising.
Regards,
meaz

BoomAM · 18 Aug 2006 at 11:02

So is 6db bad? Or is it only bad when it doesnt connect?

MagicUK · 20 Aug 2006 at 10:48

yeah ADSL max will want a 6db snr LOWEST, the higher your speed goes the lower your snr, ive just moved my router from the extension cable where i was synking at 5.5mb on my belkin router with a 6.3 snr, my new results with it plugged direct into the master socket is:

Downstream Upstream

Data rate 8128 448
Noise margin 12.9 21.0
Output power 19.7 11.8
Attenuation 34.0 20.0

samknows website details:

You are approximately 1.59km from the exchange (straight line distance).