I have installed the latest version of openfire 4.6.1 and I use conversations for andiord, when I am on the same Wi-Fi network, calls work without problem, but when I change to another network or mobile data, the call cannot be linked, please help.
That sounds like a service side STUN/TURN component is missing. Have you checked that Openfire has that capability? Potentially it has not. I would also expect that Conversations is able to tell you that this is not supported by the server.