I'm tried to test iOS version of 3CX client and it seems not working. 1. I'm installed 3CX client on my desktop and 3CX client on my iOS device connected to the same extension. When I try to make a call to this extension desktop client didn't ring at all. iOS client rings when iOS-device is sleeping but when I try to answer it's disconnect. On the caller side I get "busy". 2. I try to use only iOS-client without desktop. The same problem. I can't make a call in both directions with iOS inside the PBX. I can make a call to the outside trunk only.