How to diagnose Wireless network

The strenght of the signal seen

Seems to be ok (between good and excelent) ill try the software you proposed.

Which brand would you think could do the job?

I've had verry good experience with linksys. It's not too expensive too.

Linksys is certainly not any better than D-Link. I see way more problems with Linksys but that might be because it is more popular because they both have high failure rates.

One of the components is defective but in this case it's difficult to be sure which one. I would return one or both for replacement.

I assumed the wireless devices were new and are not working as they should. If that's the case, he should exchange them whether they work in G mode or not.

I have noticed that the rest of the computers that are connected to the same router have A/B only standards, these (except one) have no problems.

Is there an update to the firmware for this router?  Go to the web interface and check to see if there are updates to the firmware; make sure before you install you backup all of your settings in case something bad happens during the install.  Once firmware has been updated, reset all the computers.

With reset do you mean restart or uninstall and reinstall the wireless network?

>we have a wireless network in which a computer is frequently disconnected
Wireless networks are not easy to troubleshoot, the RF component is what throws off most admins and engineers. Using a D-Link I am assuming that the AP is installed in a home and not a business.
Please clarify the environment; office, home, etc. and how many computers on the wireless network using the services. How far away is the computer from the AP that is dropping out? How many walls are in the path of the computer and AP? (What type of walls; dry wall concrete, etc).

Billy

reset=reboot so that they will disconnect and reconnect to the wireless router.

At this point the things are like this:

All wireless computers work fine but a couple with a PCI wireless adapter with 802.11n standard, works with internet very well but if I want to open files(excel, word, etc.) in a server of the same LAN, take alot of time for it, and sometimes files are not even opened.

The signal is very well, but is this something to do with N standard ?

If I go and open the same file from a wireless computer with B/G standard, there is no slow performance (those are close to the N wifi standard), why?

what do you mean they are close to the 802.11n standard; not sure what you mean by that. 802.11n uses the 2.4 and 5Ghz spectrum, yes they have some of the same characteristics, but they are very far from being close together If you are having issues with one host, then I suspect an issue with the wireless card, drivers, and/or Operating System. You could also have interface using 802.11n if you are using 40Mhz channel spacing causing issues with your signal. Are you using the 2.4Ghz band or 5Ghz band, what happens when you switch to the other?

Billy

What I meant by closer to the N standard , was that the computers that are using a Wireless card with N standard, those are very close to the router.

We have decided to install them using ethernet (now they are working pretty well).

I had to change to Ethernet