Last issue’s "Turbulence In The Ether" ( http://langa.com/newsletters/2006/2006-04-03.htm#3 ) generated some *great* emails. Here’s a sampling:
Fred, You didn’t mention changing the wireless channel. Most wireless routers arrive setup to use channel #6 by default. If you use Netstumbler ( http://www.stumbler.net/ )you can see the wireless networks in range and what channel they are using. If a neighbor, or neighbors are all using channel #6, or the channel you are currently using, this can wreck havoc on your network. Ask him to find a free channel which is not in use nearby. Even if he doesn’t have any nearby networks a channel change can eliminate or lessen much interference. Thanks for all the valuable info you provide! —David Hartsock
Hi Fred, One thing I’ve noticed in troubleshooting wireless networks for home clients is that a television can provide a lot of interference, especially if it’s a large screen. Many people around here use Cox cable, and many of them have their wireless routers set up near their TV sets, since that’s where the coax cable (which delivers both television and internet signals) enters their living space. I’ve seen people who have had their wireless router a foot or two from the TV, and when I’ve moved it as far away from the TV as the ethernet and power cables would allow, their internet-reception-dropping problems have all but vanished. A longer ethernet cable might be indicated here, so the router can be moved 8-10 feet from the TV (and the cable modem), assuming there’s another power outlet available for the router. Or, a longer coax cable between the wall jack, or coax splitter, and the cable modem would allow for moving both cable modem and the router away from the TV. Better yet would be to set up the cable modem and wireless router in another location altogether, if there’s another coax wall jack available that isn’t near a TV. This problem is more particular to cable users, of course, since DSL customers are less likely to have their wireless routers sitting so close to a TV. —John Howard
Fred, You might pass on the fact that switching the router to use channel 11 tends to avoid the things in the house that can cause this disturbance, such as Microwave Ovens, 2.4 GHz telephones and any other 2.4 GHz devices in the house. Another possibility is setting the Screen Saver to come on too quickly. I find that my WiFi connected computer has to reconnect after I wake it up after the Fade to Black setting for the screen has kicked in. I do not use hibernate or system standby. I have this Power Setting set to 20 minutes and have never had a download interrupted. —Richard Dinning
Fred – I had a client in Sydney with similar problems and feel this maybe of use as it seemed to solve the problem.
1. Naval base can definitely cause problems with bursts of
transmissions. There is not much that can be done and it seems rare.
2. Make sure there are no metallic objects of ANY kind near the
transmitter. My client had a wooden table with a hidden metal frame!
3. Try some of the other channels available. Run Netstumbler to see
which ones are heavily used.
4. Check DHCP allocations and check who is logging on.
5. Enable encryption in case of alien log ons. Who knows what problems
they are causing!
6. Try relocating the transmitter to another part of the house.
I am not sure which of the above fixed the problem but they have not
had a problem since! –Gary Brouwer