I recently got a new router to replace my old one (which had the same issue) and it frequently disconnects randomly for a couple seconds then reconnects again. This seems to only happen to anyone using wireless connections and not when its connected with an Ethernet cable. I've even changed the router channel and the problem still persists and its not near anything the could disrupt the signal so I don't understand.
It could be interference, but you changed the channel so that may not be it. Use an app like WiFi Analyzer on android/ios that will scan for wireless networks to make sure you aren't picking a channel that your neighbors are using. Pick a channel, 1, 6, or 11, for best results.
You can try reducing the security levels on your wireless from WPA2 down to WPA. Selection of both TKIP and AES may help as well. Some older wireless network cards have problems with WPA2 and AES.
It may be one wireless PC on the network that is disconnecting everyone when it connects. This happens when an older wireless G devices connects to a wireless N network. The router will disassociate everyone in order to provide service to the slower wireless G device. When the devices re-connect, everyone is at slower wireless G so it may be best to upgrade any older devices that you may have.
Maybe this will help. Maybe not. Good Luck.
With the same issue on 2 routers, it's probably not a defective router. But it could be the settings. As Matt suggested check your security settings and the wireless mode. If all of your devices are "n" use performance mode. Otherwise use compatibility mode.
Inssider (available for free at the following link) will show you other devices and enable you to pick the best channel.
http://www.metageek.net/products/inssider/
Is the problem is on multiple devices or just one? If it's only one the issue could be the wireless card.
Since it is a wireless problem think about distance and obstruction. They will reduce signal strength and could cause intermittent problems. Try testing close to the router and see if the same problem occurs. Router positioning can improve signal quality. Don't overlook little things. Example: many users stand the router up. I found that I get better reception with it laying on it's side. And one of my laptops has a significant change in performance by rotating it 90degrees. The kind of problem you are having may need some trial and error research to solve.
I did download inssider and I made sure the router's channel doesn't match someone else's, I made sure the router is was laying on it's side, and I switched it to performance mode. It's only kinda made it better but I'm still disconnecting, as well as my other devices. Not as much as before but it's still happening.
Start a new topic or ask questions in the open forum.
