Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
Sudden change in SN Margin
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- Re: Sudden change in SN Margin
Sudden change in SN Margin
16-07-2011 10:38 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
The SN Margin on the uplink of my Thomson 585 v8 has overnight dropped from 13.5 to 7 after several weeks of stability We had quite a lot of rain last night. Is this a typical outcome when the BT stuff gets damp? All circuits ar underground.
Edit: Forgot to mention it is standard copper ADSL
Edit: Forgot to mention it is standard copper ADSL
Now Zen, but a +Net residue.
Message 1 of 4
(871 Views)
3 REPLIES 3
Re: Sudden change in SN Margin
16-07-2011 2:41 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Has you phone line by any chance become crackly? Upstream frequencies are at the lower end of the range next to those used for voice.
Could be dodgy joints in a flooded manhole.
Could be dodgy joints in a flooded manhole.
David
Message 2 of 4
(381 Views)
Re: Sudden change in SN Margin
16-07-2011 4:19 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
There's a few crackles on the quiet line test (17070 option 2) but not many.
The "normal" 13.6/6.5 SN ratio was restored when I restarted the Thomson Route but over the past few hours it's crept back to 8.5/6.0 I guess I'll wait until the sun shines. The service is still running though a little bit more slowly, but I don'r want the joy of invoking an OpenReach djinn so I'll ignore it for a while.
The "normal" 13.6/6.5 SN ratio was restored when I restarted the Thomson Route but over the past few hours it's crept back to 8.5/6.0 I guess I'll wait until the sun shines. The service is still running though a little bit more slowly, but I don'r want the joy of invoking an OpenReach djinn so I'll ignore it for a while.
Now Zen, but a +Net residue.
Message 3 of 4
(381 Views)
Re: Sudden change in SN Margin
16-07-2011 5:36 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I may be wrong here but as far as I know the upstream noise margin reported by the router is set at resync and then doesn't change as it is actually measured by the exchange equipment
Your results therefore should be the result of a resync and not a creeping change
What I am sure about is that I have never had the upstream noise margin change dynamically as the downstream noise margin does
Your results therefore should be the result of a resync and not a creeping change
What I am sure about is that I have never had the upstream noise margin change dynamically as the downstream noise margin does
Message 4 of 4
(381 Views)
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- Re: Sudden change in SN Margin