I configured a 3CX phone system on computer A as server, then install 3CX phone on the same computer. The client can connect to server and make call. Then I install the client on another computer B, and configure account there, but the client on computer B can't connect to server. Note: both A and B are in the same domain, and all 3CX phone system service are allowed by anti virus system. why the client on B can't connect to server, and A could? Anyone could help?