But can be configured to work with two frequencies is adapted automatically. The mobile card wireless driver is configured to work only with 20 MHz at the factory. The router is configured to run with a frequency of 20 or 40 MHz, making the switch automatically in the factory. The laptop is connected to a router TP-Link TL-WR740N. After losing an entire afternoon and looking at forums and their complaints, I think that I found the solution to the problem (at least, here is running). Recently I came across the same problem identified by many with a Dell Inspiron 15R laptop 7520 with the Dell Wireless 1703 (Atheros chipset). My network card is a Wireless Dell 1703 802.11b/g/n 2.4 ghz and I tried to update and to re - download the firmware, but nothing seems to fix. If I try to fix connectivity problems, he always find and solve some in the network card or wireless, but then point again, after 10 minutes, or so, it happens again. But if I click on the network icon in the toolbar, it starts working again, but it stops in the next 10 minutes, once again, and so on. After, I'm online, every 10 minutes my network access stops working completely. First, wifi takes a lot of time to connect. I bought a Dell Inspiron 7520 for a week now, and I had a strange problem with internet connectivity since then. Problems of internet connectivity with Dell Inspiron 7520 (1703 of Dell Wireless 802.11b/g/n 2.4 ghz)

Dell wireless lan card switch