I am using WRVS4400N in our company as a AP only.
Before some time, when majority of wireless clients were computers, everything worked fine. But now, when mobile devices are in majority, something strange is happening.
While portable computers still work fine, smart phone and tablet have extreme problems.
Although there is indicator that WiFi is connected and signal is strong, there is no guarantee that there is an internet access. Most of the times there is none. You can fix this by simply disconnecting and connecting WiFi on mobile device, but after a while, internet will be inacceasable again. Or you can wait and eventually you'll get to the internet access again.
I browsed through other posts, but I didn't cross any similar post. I will happily provide more info. Hope you have some good advice for me!