AFAIK, and if talking about "interoperability" its closer to that but its not, coz you need the CTMS and the CUV with 3515MCU or 3545MCU under version 5.1 or higher.

I don't have any idea what we are using here be guessing a 1on1 conference, it can be a CUVC type only.

here's another complete diagram

http://www.cisco.com/en/US/i/200001-...000/224361.jpg
http://www.cisco.com/en/US/i/200001-...000/251570.jpg


important FAQ:

Q. Is the Cisco TelePresence Multipoint Switch a multipoint control unit (MCU)?

A. No. The Cisco TelePresence Multipoint Switch is a next-generation Cisco TelePresence multipoint (media) switch designed for high performance and ultra-low latency. A video conferencing MCU is designed for video conferencing with a wide range of standard-definition and high-definition video conferencing endpoints.

Q. What about Cisco TelePresence Multipoint interoperability?

A. Multipoint interoperability will be available when the solution ships. Multipoint interoperability allows for conferences that are a mix of Cisco TelePresence endpoints and video conferencing endpoints. The full Cisco TelePresence experience is maintained for Cisco TelePresence to Cisco TelePresence endpoints.

Q. Can Cisco Unified Videoconferencing customers interoperate with Cisco TelePresence?

A. Yes. Customers can continue to use their Cisco Unified Videoconferencing Systems for impromptu video telephony, traditional video conferencing, rich-media conferencing with Cisco Unified MeetingPlace® conferencing, and Cisco TelePresence Interoperability.

Q. How is Cisco TelePresence integrated with Cisco Unified Videoconferencing Systems?

A. Cisco TelePresence is integrated with Cisco Unified Videoconferencing Systems through the Cisco TelePresence Multipoint Switch, which can initiate an impromptu conference on Cisco Unified Videoconferencing Systems and exchange video and audio traffic from a conference.