TopView supports making voice calls through VOIP. This requires a network connection between the TopView machine and the VOIP/SIP Server.
Once the correct credentials are configured calls may still fail due to firewalls or port restrictions between TopView and the VOIP/SIP Server.
VOIP Firewall Checker
The 3CX firewall checked can help diagnose firewall or port issues between TopView and the VOIP SIP Server.
Download the 3CX Firewall Checker
The firewall checker is available from 3CX.
Running the 3CX Firewall Checker application
In this example, we ran the checker against a Grandstream VOIP device located in our office.