You can enable an IPv4-only audio-only device with video by using a
Cisco application, Cisco Unified Video Advantage. You can associate the
application with a
Cisco Unified IP Phone in order to display the video component on your PC or laptop.
This association can occur before a call is made or during a call (mid-call).
Cisco Unified IP Phones, such as 7975, 7940, 7960, 7975, 6961, 6941, and 6921 support
Cisco Unified Video Advantage.
For example, a call occurs from a
Cisco Unified IP Phone 7975 to a video phone. The call gets established as audio only.
After Cisco Unified Video Advantage is associated with the
Cisco Unified IP Phone 7975, the call gets reestablished as a video call.
During the association,
Cisco Unified Communications Manager receives updated capabilities for the phone
via existing SCCP messages. After the updated capabilities are received,
Cisco Unified Communications Manager negotiates for video.
If the initial call involves an IP phone without a video,
only audio location bandwidth gets reserved, and the media layer establishes an
In addition to audio phones, Cisco video phones, such as
9971 and 9951 also support Cisco Unified Video Advantage.