Here is a bit of a wake up call from CIO magazine, who warn us that "CIOs ready to take the plunge with VoIP need to understand that data firewalls alone won't protect them." They recommend:
- Encypting VoIP traffic;
- Avoid soft-phones;
- Seperate voice and data traffic;
- Install a VoIP firewall; and
- (The one we often forget about) Ensure physical security.