Low SNR

Folks I have a very low SNR currently. See following

Noise margin (Down/Up) 3.4 dB / 9.1 dB

My broadband tends to reset itself about every other day. Does anybody know any solution to fixing this?

My service provider is BT Retail and they are using the BT Wholesale 21CN WBC offering to deliver my "Up to 20 Mb" service.

What aree you full stats - up and down.

Also, can you run RouterStatsLite http://www.vwlowen.co.uk/internet/files.htm#routerst...

Set it for 1 sample per minute and 1500 samples. That will give a full day graph. Host the image and provide a link. It will show how your SNR varies during the day and when it is resetting itself. For example, it it resets in the early afternoon at 6dB margin that will slowly decrease until it gets too low for the modem to hold sync. Or there could be a major external noise event causing a loss of sync.

In reply to a post by MHC:

What aree you full stats - up and down.

Also, can you run RouterStatsLite http://www.vwlowen.co.uk/internet/files.htm#routerst...

Set it for 1 sample per minute and 1500 samples. That will give a full day graph. Host the image and provide a link. It will show how your SNR varies during the day and when it is resetting itself. For example, it it resets in the early afternoon at 6dB margin that will slowly decrease until it gets too low for the modem to hold sync. Or there could be a major external noise event causing a loss of sync.

Looks a good way of collecting stats but it doesn't seem to have the BT Retail Home Hub version 2 in the list. Any ideas on how I can use it to collect stats from a HH2?

Thnaks in advance

Edited by deleted (Thu 27-Jan-11 16:55:27)

Here are the full stats from the HH2 -

Line state Connected
Connection time 0 days, 17:43:12
Downstream 16,663 Kbps
Upstream 828 Kbps
ADSL settings
VPI/VCI 0/38
Type PPPoA
Modulation ITU-T G.992.5
Latency type Interleaved
Noise margin (Down/Up) 3.5 dB / 9.1 dB
Line attenuation (Down/Up) 26.0 dB / 13.3 dB
Output power (Down/Up) 21.1 dBm / 12.4 dBm
Loss of Framing (Local) 0
Loss of Signal (Local) 0
Loss of Power (Local) 0
FEC Errors (Down/Up) 31167375 / 8
CRC Errors (Down/Up) 140 / 2147480000
HEC Errors (Down/Up) nil / 3422
Error Seconds (Local) 1541

We are only about 1600 meters from the Fareham exchange with as far as I can find out all underground cabling.

I don't know who builds teh HH v2 but it could be Thomson or Sagem so you could try a couple of those.

However, as you know which page to use to get the stats you can use a User Defined Modem. There are instructions on the website about how to do it - it is fairly simple once you have identified where the stats are in the user interface.

In reply to a post by MHC:

I don't know who builds teh HH v2 but it could be Thomson or Sagem so you could try a couple of those.

However, as you know which page to use to get the stats you can use a User Defined Modem. There are instructions on the website about how to do it - it is fairly simple once you have identified where the stats are in the user interface.

I have tried using both the Thomson or Sagem as well as the User Defined modem but none of them work because the HH 2 has multi level entry for getting the stats. You can't login and go straight to the stats page. It's a real pity as the software you recommended look really good.

A pity.

The results from a BT business hub: Graph you can see how the downstream SNR varies over 24 hours.

Edited by MHC (Fri 28-Jan-11 14:46:39)

In reply to a post by MHC:

The results from a BT business hub:
<snip>
you can see how the downstream SNR varies over 24 hours.

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