LifeSize UVC Transit is a firewall and NAT traversal solution that enables secure HD video calls within and across networks. It includes a Transit Server that provides firewall and NAT traversal from a central location. It also includes Transit Clients that reside within local networks and act as proxies to render firewall/NAT traversal services. Together they make video more secure, scalable and easier to manage. UVC Transit supports standards-based SIP and H.323 protocols to allow interoperability with LifeSize and third-party systems for secure intercompany video calls.