/mcpSIP Trunks • On the Trunk Configuration window in Unified Communications Manager, check the Retry Video Call as Audio check box if you want the call to use audio when the video connection is not available. • Reset the trunk. Third-Party SIP Endpoints • On the Phone Configuration window in Cisco Unified Communications Manager Administration, check the Retry Video Call as Audio check box if you want the call to use audio when the video connection is not available. • Reset the endpoint. Cisco Video Conference Bridges Unified Communications Manager supports a variety of solutions for video conferencing. The following video conference bridges support ad hoc and meet-me video conferencing: • Cisco TelePresence MCU • Cisco TelePresence Conductor • Cisco Meeting Server Cisco TelePresence MCU Video Conference Bridge Cisco TelePresence MCU is a set of hardware conference bridges for Cisco Unified Communications Manager. The Cisco TelePresence MCU is a high-definition (HD) multipoint video conferencing bridge. It delivers up to 1080p at 30 frames per second, full continuous presence for all conferences, full transcoding, and is ideal for mixed HD endpoint environments. The Cisco TelePresence MCU supports SIP as the signaling call control protocol. It has a built in Web Server that allows for complete configuration, control, and monitoring of the system and conferences. The Cisco TelePresence MCU provides XML management API over HTTP. Cisco TelePresence MCU allows both ad hoc and meet-me voice and video conferencing. Each conference bridge can host several simultaneous, multiparty conferences. Cisco TelePresence MCU must be configured in Port Reservation mode. Cisco TelePresence Conductor Video Conference Bridge Cisco TelePresence Conductor provides intelligent conference administrative controls and is scalable, supporting device clustering for load balancing across MCUs and multiple device availability. Administrators can implement the Cisco TelePresence Conductor as either an appliance or a virtualized application on VMware with support for Cisco Unified Computing System (Cisco UCS) platforms or third-party-based platforms. Multiway conferencing, that allows for dynamic two-way to three-way conferencing, is also supported. Cisco TelePresence Conductor supports both ad hoc and meet-me voice and video conferencing. Cisco TelePresence Conductor dynamically selects the most appropriate Cisco TelePresence resource for each new conference. Ad hoc, “MeetMe” and scheduled voice and video conferences can dynamically grow and exceed the capacity of individual MCUs. One Cisco TelePresence Conductor appliance or Cisco TelePresence Conductor cluster has a system capacity of 30 MCUs or 2400 MCU ports. Up to three Cisco TelePresence Conductor appliances or virtualized applications may be clustered to provide greater resilience. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 871 SIP Interoperability Cisco Video Conference Bridges