Customers who connect through a firewall or proxy server might not be able use the voice feature. Here's how to determine if this applies to you:
You can configure your firewall or proxy server with the following information:
Protocol: UDP or TCP
Servers:
Ports: 5000-5010
Where's the Contact Customer Care button? With so many improvements to Messenger since the version you're using (lots more features and reliability), we figured you're ready to move up. So get your upgrade and with the new version, rest assured if you have questions, you’ll find that friendly button on its help pages.