The typical video call includes two or three Real-Time Protocol (RTP) streams in each direction (that is, four or six streams). The call can include the following stream types:
Audio (same codecs as a normal call with additional codecs G.722 and G.728)
Video (H.261, H.263, and Cisco VT Camera wideband video codecs) at a different port
Far-end camera control (FECC) (optional)
Callmanager supports , depends upon the type of camera using.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00803edb2a.html
