Hello community,
I have installed the compact server on my windows 2012 server and mizudroid  softphone on two android mobiles.
I tested them internally and with mobile data and regarding audio calls and instant messaging all are going perfect.
I have problems establishing video calls either internally on the network or through mobile data.
The soft phone rings once and then the call is finished.
I should mention that i use it only with the server installed on win 2012 machine and not with an external voip provider.It is for home use up to 6 android clients
Any idea how can this issue be solved?

thanks in advance