See also: Back Channel
CIMM DEFINITION: Opposite of “pushing” out content or signals from the operator to the viewer. Advanced Set-Top Boxes can also “pull” data such as usage and viewership from the home or Set-Top Box back to the headend and operator. Back Channels give the capability of both pushing and pulling data and content.
NOTE – Not all boxes pull data and have back channel. Missing viewership for measurement purposes.