When a user dials a number like '6501' on a SIP endpoint registered to an Expressway that is configured with only the cisco.com domain, the alias presented in the SIP INVITE message would include the dialed number combined with the configured domain. Hence, the alias presented in the SIP INVITE message will be '6501@cisco.com'.
TURN servers are used to assist in signaling and media traversal, especially in scenarios that involve endpoint devices behind firewalls or NAT. In a Cisco Meeting Servers solution, the TURN server functionality is typically implemented on the CMS edge server. This is because the edge server is responsible for handling external connections and ensuring that media can traverse different network boundaries. Therefore, the correct configuration for TURN servers in a resilient and scalable CMS solution is on the CMS edge only.