Slow response from just one of four access points zoneflex ZF7363
We have a zone director managing 4 access points, model zf7363 and software version 18.104.22.168.110. All used to work fine, we could roam between them all and response fine. All traffic goes out via a firewall and ADSL lines which test fine (as we can connect direct to confirm line is fine).
3 of the access points all work fine, with very low pings.
However on just one of the access points, when I'm connected to that access point (verified via the zonedirector login), I get ping responses of 2-3 seconds. If I roam to near one of the other access points, it switches and ping goes down.
This is if I'm right next to it. I've also waited until everyone else is out, and no one else is connected to the AP other than myself. I've tried a power reset. Only thing I notice is the 5k light on the box flashes.
I (and everyone else), get dropouts to that AP and response of 2-3 seconds. Sometimes however it is absolutely fine.
Does anyone have any thoughts ?