Kevin,
The only impact is the with the Voalte app. All our other VoIP cleints are not having issues. Roaming seems to be fine but may be a minor issue. The Voalte RF engineer wants to the change the Max retries but I'm not convinced that will help. I would test in the lab before changing it in production anyway.
Voice quality is good. There haven't been any complaints for voice quiality. Only dropped or missed calls.
The uses SIP to build and tear down the call. I've been using the voice commands from the cli to monitor the calls logs and counters.
1) Is this a hospital issued client or a personal client? It is a hospital issued client being used by all the nurses.
2) Does the application control the WiFi interface? The app does not control the WiFi interface.
3) Does the application support WMM? I don't think it does but I will need to confirm.
Voalte's RF Engineer says the wireless network is fine and that roaming with the iPhone could be the major issue. He did the wireless site survey before implementation and we remediated areas where he saw possible coverage issues.
I'm trying to schedule a call with Voalte's PBX/App Engineers for later this week in order to understand a little more about Voalte app. It has a lot of moving parts where something could be broken. But the wireless network is always the first thing that gets blamed.
Thanks,
William