You configure a new IP gateway for TLS-secured communications using the IP address 192.168.1.1 and port 5061. You are unable to receive voice mail messages.
Why is this?
A. The IP address configured is incorrect.
B. The FQDN of the IP gateway should have been specified instead.
C. A firewall is configured in between the IP gateway and the UM server.
D. The port chosen is not suitable for secured communications.
