We have 4 x Mitel 5624 Wi-Fi phones we're trialling at a customers site.
The site uses a D-Link DWC-2000 wireless controller + 149 D-Link DWL-8610AP access points.
Our problem is that we can't get the phones to seamlessly / fast roam between access points.
We removed all security from the voice SSID thinking security was the issue but that made no difference to the roaming performance.
We've tested every recommended wireless controller / WAP setting from multiple configuration guides for Aruba, Cisco, etc. but nothing has worked thus far.
The phone can take anywhere from 1 minute - 5 minutes to roam to a WAP outputting a better signal.
You can be standing directly in front of a WAP outputting a -30dbm signal and the phone will remain connected to a WAP outputting -80dbm.
Phones are running the latest firmware version 6.0.7
From our perspective it seems like the roaming algorithm in the phone is broken.
Anyone have any suggestions on how to improve the roaming functionality or experienced the same problem?