McDewey

Preferred Architecture for Cisco Collaboration Release 15 On-Premises Deployments PAGE 28
Collaboration Edge

Cisco Expressway Cisco Expressway provides secure firewall and NAT traversal for mobile or remote Cisco Jabber and TelePresence video endpoints (Figure 11), and it provides secure business-to-business communications (Figure 12). Cisco Expressway consists of two applications: Expressway-C and Expressway-E. Deploy Cisco Expressway-C inside the network and deploy Expressway-E in the demilitarized zone (DMZ) by connecting separate network ports on Expressway-E to the organization's network and to the DMZ. Cisco fully supports a virtualized Expressway-E in the DMZ; however, a dedicated server can be deployed based on the company's security requirements. Figure 11. Traversal for Endpoint Registrations Through Firewall with Expressway-C and Expressway-E

Figure 12. Traversal for Business-to-Business Calls Through Firewall with Expressway-C and Expressway-E

Cisco Expressway-C Place Expressway-C in the trusted network inside the organization. Deploy Expressway-C to: