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  Losining Wireless Connection 
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Vlad Dagaev Sep 22, 2011, 09:05pm EDT Reply - Quote - Report Abuse
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Need help desperately!!!!!

Iím usually pretty good with computer problems, and the one helping others. But this problem has me beat. I just donít know what to do any more.

The problem is my wireless network keeps disconnecting once in a while (approx. every day or two). When it goes out, eventually I am unable to connect any of my desktops or laptops wirelessly until I power cycle the modem and the router. But the ones connected by wire work fine.

Here is what Iíve gone through to trouble shoot:

I called my ISP provider, and they said if Iím not having problems connected directly to the modem they canít help me. It works for weeks connected directly with no problems.

I called the manufacturer of the router, and they said since it works by wire, and Iím able to get a connection wirelessly, itís not their issue.

I upgraded the firmware on the router.

I went through 2 different brand new routers (Linksys and DLink), and also tried new adapters.

I tried changing the location of the router, even bringing it 5 feet away from the desktop.

I tried playing around with the settings of the router (channel)

I even upgraded my Internet connection to 35 mbps which comes with a new modem/gateway which acts as a wireless router too. The new gateway also loses wireless connection.

I donít know what to do as I ruled out everything. Itís not the ISP problem, itís not a router issue, and itís not a specific computer problem. I just donít know what to do. I really donít want to run cables to all of my computers. Itís very inconvenient for laptops.

Please help!!

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john albrich Sep 23, 2011, 04:53am EDT Reply - Quote - Report Abuse
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Edited: Sep 23, 2011, 05:00am EDT

>> Re: Losining Wireless Connection
Can you diagram the topology of how your routers, switches, interconnections, and computers are all set up?

In the meantime, here are some GENERAL thoughts. They are separate factors that COULD affect wireless electronic devices...

It sounds like you have quite a few computers/network-devices attached to the network. If several of them are currently continuously connected to the network 24 hours per day, you might experiment with 100% disconnecting them from the network one by one for a day or two at a time, and see if the network behavior changes. If it doesn't change when you disconnect one device, then disconnect another device and proceed until you either find a possible culprit or nothing changes. <Alternatively, you could start by stripping your network down to the bare minimum (e.g. your wireless modem/router and 1 wirelessly connected computer) and progressively add more devices to the network until the failure re-appears. Leave the hardwire connected devices off the network until you have the wireless portion running error-free.>

Disable ALL power management on ALL devices. System level power management and all device (e.g. HDD) power management. No timed power off, hibernation, or sleep modes. Note that for some hard drives you may have to use a drive-specific utility to disable "Advanced Power Management". Before you do anything document your current settings so you can return to them if desired.

Consider also your wireless network may be getting interference at certain times of day. You might try plotting the times. It could be coming from other networks or the frequency range might be simply being swamped by high-power RF emitting devices (e.g. high-leakage microwave ovens, 2.3GHz/5GHz portable phones (not cellphones), wireless cameras and/or "video senders", etc). Neighbors' equipment could also contribute. The interference could result in totally unpredictable behavior, including network shutdown (depends on hardware, firmware, and drivers).

Someone may also be trying to hack your system, piggy-backing, etc and causing your network to crash.

If you aren't using AC power conditioning, you might give that some consideration as well. One (or more) of the devices on your network may not react well to poor quality AC power and contribute to the problem in an unpredictable manner.

More difficult technical assessments:
Check the voltage output of all the "wall-wart" power supplies for your equipment. Check for both the DC output level and verify that there is no signfiicant AC component. For example, if you have a 5VDC unit, verify that it's 4.5-5.5VDC. Then check that the AC component isn't more than perhaps 100mV. Be aware that many cheap units may be unregulated and voltage readings may only be valid while in use, so unplugging the unit and connecting a voltmeter to the power plug may yield false readings. For example, an unregulated 5VDC unit when NOT connected to the device it powers, may actually measure 10VDC...but when connected and powering the device the load causes the voltage to drop back down to about 5VDC. Usually when a device uses an unregulated power "wart" it either has its own internal voltage regulator or it's designed to be somewhat tolerant of input voltage variations.

added wireless cams and video senders to list. (for example, I've had problems with network interference to and by "X10" wireless video cams/senders)

Poloxamer Nov 07, 2011, 06:38am EST Reply - Quote - Report Abuse
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>> Re: Losining Wireless Connection
If your power dips for a millisecond (meaning you don't see it but it happens) and your router turns off and on; it is loosing conection with your modem and then everything has to be reset.

You have a power problem.

Get a UPS for your modem and router, and it does not have to be the super expensive kind because your wattage is probably less than 100 watts.

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