A CNAME record will be needed to point your URL to our server. Whether you own a wildcard cert or a single cert the concept works the same. For voice.viirtue.com, you would need to make a cname record that points the host (your URL) to our server, core2-nj.5060.cloud. See the screenshot below for an example.
Once this is uploaded, going to your URL should hit our splash screen. If your URL is not in the address bar but you are still on our splash screen, the name record was not done correctly or a different type of record was made.