Plantronics + Polycom.
Now together as
I would like to know how mobile works as a standalone device.
To be more specific,i have set up a RPG500 with NAT and port forward,i can make/receive calls to this device from other RPG's.
But when i try to call this public IP address from the mobile app it is really confusing.
I use mobile data and the call is dropped,i call later again with data and it works.
The same happens using Wi-Fi,i have noticed that i can call the device but when i join to another WiFi the call is dropped.
It is really strange,i can not find out how this pattern works.
Keep in mind that there is not a port forward/firewall issue,i have double checked it.
The issue is only how the app should work.
I would recommend testing to a 3rd party like: