Interference can come from the stragest sources. My personal example came from a Sony integrated surround sound system that when switched on knocked 10dB odd the brodbamd signal to noise ratio making any connection unsustainable. I only found it by a well engineered process of trial and error observing the snr as I switched different bits of household kit on and off.
The other giveaway for me was watching it nose-dive at 15:30 when Daniel used o get home from scho and switch everything on -- David Morris [email protected] On 1 Feb 2010, at 18:16, "wilcox_mike_01" <[email protected]> wrote: > > Hi Arthur, > > > I plug my line from my my modem/router straight into the connector > on the > > inside of the master socket (using the socket exposed when the > cover plate > > is removed.cover plate removed), that's the only way it will work > at all. > > I have disconnected my home wiring from the master socket to see if > > removing it had any effect (no it didn't). > > I thought you said earlier that you normally plugged the router in > via an extension (ie the "home wiring"). When you say "that's the > only way it will work at all" do you mean during tests today, or > that this is how you normally have it plugged in? > > > I have a Netgear 'G' wireless router (about two years old) > attached by the > > supplied (by Netgear in the kit) cable to the master socket. My PC > thinks > > that it had a very good (little green screen) wireless link and > (usually) a > > 56 something or other speed - the maximum between it and the > router (it > > does however vary from time to time to lower speeds and a yellow > screen). I > > have tried to use an ethernet connection between the PC and the > router to no > > improved effect. I brought my daughter's PC over and used that both > > ethernet and wireless to get no improvement. > > Kitz reckons that the Netgear DG834 is one that can keep the > connection well, even with interference problems. > > > What astounds me is that on rare occasions I get all the > performance I > > might reasonably expect being fairly remote from the exchange, ie > a stable ( > > for an hour or so at least) link and sub-second responses, I can > even listen > > to music or see a video on You Tube. And then later on the same > day or next > > day response times go out of the window or I can't get on to the > internet > > at all. I find that if I can't get on via AOL I can't usually get > Internet > > Explorer (7) to respond either, but occasionally IE works and > sometimes I > > can log on to AOL from there. When this happens I can see my list of > > emails, but then I can't open any of them, or be able to connect > to any webpages. > > This sounds like a classic case of interference. It could be almost > anything - from the Ionosphere (remember getting AM transmissions > from europe in the evenings?), water in joints in the BT line, or > other people turning on their modems. > > At least your WiFi part seems to be working fine. > > > > > Does any of this help the diagnosis? > > A little, but you are probably going to get numbers on this, so we > can see the actual state of the line as far as the router/modem sees > it. > > Probably the best thing you could do is to leave the modem/router > plugged into the test socket at the back of the master, and run a > program to monitor the line statistics. If you have the right kind > of modem, you might find "RouterStats" useful: > > http://www.vwlowen.co.uk/internet/files.htm > > The graphs might give you an idea of whether you are suffering from > occasional bursts of interference, or whether it is a constant > problem. > > > > > If I change ISP what is the likelihood of getting any improvement in > > reliability or response? > > Almost certainly no improvement in reliability. At least not if the > phone connection stays with BT, as the problem is probably to do > with the line to your house. > > You might find another ISP more responsive to your plight than AOL, > but I have no experience of whether they are good or bad. I've found > that you can get a decent response from PlusNet provided you go via > the forum rather than the normal support desk, and even then it can > take some perseverance. Especially if BT need to be called out. > > > Is someone able to control the bandwidth I can use. I > > am probably one of the half dozen remotest users from the nearest > (Ranskill > > actually) exchange - I'm I getting what's left over in bandwidth > terms after > > everyone else in the area has had their slice of the cake? > > Being remote shouldn't affect your share of the bandwidth from the > exchange to the rest of the world. > > Your main limitation will probably be that the length of your line > leaves your modem syncing to the exchange at a relatively low speed > level. Your current problem is *probably* that interference causes > the sync to keep dropping, and forcing the mode to resync with the > exchange. When the sync goes, your browsing experience will tend to > show as pages that fail to load, or downloads that are extremely slow. > > There are a few things that BT and your ISP can do to the line to > try to make it more reliable, such as turning on interleaving, or > increasing the noise margin. Both will tend to make your connection > slower - but the exchange has probably already tried these out for > you. > > Mike > > [Non-text portions of this message have been removed]
