Sinking Sync Rate!
- 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: Sinking Sync Rate!
Sinking Sync Rate!
19-08-2011 3:34 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
The rate has dropped below 3424 on 3 occasions with the resultant drop in my IP Profile to 2500.
During the whole of this time my line attenuation has been constant at 56dB and the SNR Margin has varied between 4dB and 6.5dB.
I am uncertain as to what my best course of action might be and would welcome any advice on this.
I don’t have one of those fancy master sockets (i.e. one with a test socket).
I have 2 telephones – 1 in the master socket and the other in an extension socket.
The router (14 months old PN supplied Thomson TG585v7) is plugged into the extension socket.
I have done a quiet line test – there is a continuous very low level of noise on the line.
I have tried removing both phones.
I have changed both ADSL filters.
The only other options I can think of involve spending money (which I don’t mind provided the desired result is achieved).
I could ask BT to fit a new master socket – I’ve read somewhere they would charge £170 (+VAT?).
I could buy a new router – perhaps a Billion 7700N (£50) or an Edimax AR-7284WnA (£21).
I’m tempted to buy a new router and see if that fixes the problem. Beyond that I have really no idea what I should do.
Router Stats just after restart and a Noise Margin graph from RouterStats are attached.
All ideas welcome.
Re: Sinking Sync Rate!
19-08-2011 4:38 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I'd suggest that you obtain the same line stats but from the master socket directly before spending any money. That way we can make a direct comparison to see if your internal wiring is causing any issues.
Re: Sinking Sync Rate!
19-08-2011 4:54 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
When I test from the master socket, should I disconnect both telephones? This would leave the extension open circuit (unless I leave the ADSL filter in the extension socket) - I'm not sure what effect that might have ; it may make a very good aerial!
Re: Sinking Sync Rate!
19-08-2011 4:59 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Sinking Sync Rate!
19-08-2011 5:09 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Sinking Sync Rate!
19-08-2011 5:10 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: MrT
I don’t have one of those fancy master sockets (i.e. one with a test socket).
I take it that you have already checked and disconnected the ring wire, as here http://www.kitz.co.uk/adsl/socket.htm
Derek
Re: Sinking Sync Rate!
19-08-2011 5:19 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Thanks for the thought. Yep, I disconnected the ring wire last November and got an increase in sync rate from 2080 to 3744. The uptime at that rate was 61 days
Since then the best I've achieved is 27 days. I'm currently lucky if I get 3.
I just wonder whether this very dry summer we're having in the Midlands is, at least partly, to blaim for my routers' declining stability.
Re: Sinking Sync Rate!
19-08-2011 5:26 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: MrT
I just wonder whether this very dry summer we're having in the Midlands is, at least partly, to blaim for my routers' declining stability.
I have heard that routers can suffer from overheating! People have recommended raising or angling them higher off the table etc. if horizontally mounted.
You will need the knowledge of someone better than me, but I understand it can be good practice to restart the router regularly, to clear out any noise generated bit swaps
and get your original sync rate back!
Derek
Re: Sinking Sync Rate!
19-08-2011 5:39 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: Stumpy21
I have heard that routers can suffer from overheating! People have recommended raising or angling them higher off the table etc. if horizontally mounted.
I've tried the router both horizontal and vertical over the past 6 months. No discernible difference in stability.
Quote from: Stumpy21
You will need the knowledge of someone better than me, but I understand it can be good practice to restart the router regularly, to clear out any noise generated bit swaps
and get your original sync rate back!
An interesting suggestion. Perhaps an expert might comment on this.
Re: Sinking Sync Rate!
19-08-2011 5:59 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I'd avoid doing it more regularly than that.
Re: Sinking Sync Rate!
19-08-2011 6:07 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
My current profile is 2500 so hopefully I would not go below that.
dick:quote
Re: Sinking Sync Rate!
19-08-2011 6:20 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
and that will pretty well guarantee a low sync speed and may solve the problem but then again you wouldn't necessarily appreciate a lowered IPprofile either
Quote from: Jameseh There's no harm in rebooting the router once a day at quiet times (like first thing in the morning or before you go to bed.
I'd avoid doing it more regularly than that.
Re: Sinking Sync Rate!
19-08-2011 6:36 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: MrT So tomorrow, when I move my router to the master socket and record stats with and without phones plugged in are you saying that I should not reboot at each change of telephone? I was thinking of using the GUI to disconnect PPP, then restart the router, then connect PPP.
Once you've moved the router I wouldn't re-sync again when plugging in and disconnecting telephones (and the unused filter in the extension socket). I wouldn't even disconnect from Plusnet. Changes in noise margin are what should be looked for. Significant changes there would (most likely) lead to sync speed changes if you did re-sync but checking noise margin gives a better feel for effects.
Try to plug in and remove phones cleanly to minimise risk of noise spikes causing a re-sync.
Re: Sinking Sync Rate!
19-08-2011 6:55 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
As spraxyt has suggested, there wouldn't be any value in resyncing again after moving the router on that day.
Re: Sinking Sync Rate!
19-08-2011 7:05 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
This is my noise margin over the last 24 hours
You can see that the noise margin reduces during the hours of darkness.
A resync during that time will give a lower sync speed but may allow the router to hold sync as the noise margin will trend to increase from the low point. It may drop a bit further due to the vagaries of the bit swapping algorithm.
If however you resync during the day this will give the highest sync speed but the noise margin which was set at the default value will reduce as night draws on and may cause a resync.
In the first scenario you may get a lower IPprofile but with a better chance of holding sync over the 24 hours.
You can only try it and see.
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page