Cisco VT Advantage supports the following video features:
H.263 video codec-128 kbps to 1.5 Mbps bit rates
Wideband video codec from Cisco VT Camera-Reduces PC CPU utilization on switched networks
Supported video formats (up to 30 frames per second):
352x288
320x240
176x144
160x120
Interoperable with most third-party H.323 video terminals (Cisco AVVID [Architecture for Voice, Video and Integrated Data] verified partner
the bandwidth requried is determined by the codec used and selection in the callmanager
http://www.cisco.com/en/US/products/sw/voicesw/ps5662/products_qanda_item0900aecd801985c3.shtml
