Nothing to do with me. On ALL remotes, built-in or custom, the volume buttons are diverted by Sling so they can change the volume on Slingplayer/WebSlingPlayer. So they will never affect the device. In fact the Basic Remote doesn't even have volume controls.
In the past I could change the volume of the device with the remote. Since my Cable Carrier change the box from a powerbox from Octal tv to Thomson i Can't change the volume anymore. That's why I was asking.
If it can't change the volume anyway you can use the remote of OCtalTV-Powerbox