HDBaseT is an evolving standard for running HDMI over typical Ethernet Cabling and connections.
It is not meant to interoperate with an Ethernet Network. It is meant to use the commodity Plugs, wall plates and Cables that are easy to buy and install, rather than using an entirley new connection scheme. The equipment on your HDBaseT "network" needs to be ALL HDBaseT equipment. Connecting an Ethernet device on a HDBaseT network will cause the HDBaseT components to switch to “Ethernet Fallback Mode" (EFM) , which should do no damage, but will not support HDBaseT signals. The HDBaseT 1.0 spec is based on the "5Play" feature set.