Glossary

Far End Camera Control is the means by which a user in a video conference call can gain control of a PTZ camera on a remote location which is also participating in the conference call.

Far End Camera Control specifications usually offer the following set of capabilities:

• Ability to select between different video sources - useful when there are multiple cameras to control remotely
• Abillity to create and use preset camera configurations
• Panning the camera's position (moving it left and right)
• Tilting the camera's position (moving it up and down)
• Zooming in and out

Far End Camera Control is usually acheived by sending RTP packets containing the relevant control commands.

H.323

In H.323, FECC is defined using the following set of standards:

• H.323 Annex Q, detailing the signaling required within H.323 to set up FECC support
• H.281, detailing the data format for the FECC control messages that is used. H.323 Annex Q is built on top of this specification

SIP

In SIP, FECC is defined using the same mechanisms as in H.323 (that is, H.281). RFC 4573 is the specification defining the signaling required for use of H.281 FECC messaging.