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SNR Margin Too Low?

netspeed
Grafter
Posts: 61
Registered: 24-12-2009

SNR Margin Too Low?

After some problems a few months ago with frequent disconnections, my broadband has been pretty rock solid since an engineer found a problem with external cabling in the street. Today, that's changed with multpile disconnects overnight, then it's been mostly ok through the afternoon, but just dropped again when the phone rang. My net and phones are separated at the main socket with an ADSL faceplate. But I know that incoming calls can cause error spikes. Looking at router stats, after a long period of stability, my guess is the exchange is automatically seeing if it can squeeze the pips out of my connection. From router:
"xDSL linestate up (ITU-T G.992.5; downstream: 15897 kbit/s, upstream: 440 kbit/s; output Power Down: 20.0 dBm, Up: 12.0 dBm; line Attenuation Down: 26.0 dB, Up: 14.5 dB; snr Margin Down: 3.0 dB"
SNR Margin of 3dB instead of 6dB (which I usually had) doesn't leave much scope for errors, I guess. Will the exchange automatically up the SNR to 6dB if connection drops persist, or does it have to be requested?
4 REPLIES
netspeed
Grafter
Posts: 61
Registered: 24-12-2009

Re: SNR Margin Too Low?

I forgot it's a ghost town here at the weekend.
Oh well, not an SNR Margin problem it seems. My SNR Margin has gone back to 6db and still getting lot of disconnections. They did great this time, three months since the last line fault. As usual, and same as last time, the BT fault checker reports no fault on line. The whole street's lines were knackered last time and the fault checker said all was ok.  Roll eyes
If someone from PlusNet reads this on Monday, should I ring BT (who supply my phone line) or raise a ticket and wait a week for PlusNet faults team to get around to doing it?
Community Veteran
Posts: 38,405
Thanks: 997
Fixes: 58
Registered: 15-06-2007

Re: SNR Margin Too Low?

if when you dial 17070 option 2 the line is noisy report it to BT (don't mention broadband) otherwise raise a fault at https://faults.plus.net
Plusnet Staff
Plusnet Staff
Posts: 17,641
Thanks: 535
Fixes: 159
Registered: 05-04-2007

Re: SNR Margin Too Low?

Your line is disconnecting a lot:

The advice from Oldjim is the best course of action.
If this post resolved your issue please click the 'This fixed my problem' button
 Chris Parr
 Plusnet Staff
netspeed
Grafter
Posts: 61
Registered: 24-12-2009

Re: SNR Margin Too Low?

BT's line checker reports no fault  Roll eyes, but I rang and spoke to one of their advisors in India and seems the exchange has a fault reporting on the line. They said it'll be fixed within a week. I either got temporarily lucky, or someone did something a lot quicker than that, cos my connection has been up 11 hours now. Longest for days.