Volume Control Client

In a previous post I described my system where the HDMI output of the client goes directly to a ViewSonic monitor with the audio portion split off and sent to powered speakers. My previous setups (before Contour) allowed the remote to control the volume directly through the Cox box. I cannot seem to fine a way to do this with the Contour Client box since it seems to want to pair either to a TV or to an AV receiver.

Is it possible to control the volume without pairing?

Thank you,

Ken Gash