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Aironet 1140 54Mbps connection speed

We are having some issues with our AP: Aironet 1140 at our head office where people are complaining of slow connection speeds.

I have gone through the configuration on the controller and noticed that all Clients were connecting at 802.11g connection speeds (54Mbps).

I have noticed in the configuration page on the controller Wireless>802.11b/g/n > High Throughput is disabled.  (See attached screenshot)

I don’t want to just enable this setting in case it disconnects all the users from all the AP’s not just the ones at head office.

We use 802.1x for authentication and Machine certificates.

All Clients connect using WPA2.


Would this settings increase the connection speed up to 802.11n?

Is there a way to just enable it on 1 AP to trial it before enabling it on all the AP’s?

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