HDMI Extender Over Cat5/Cat6 The HDMI Extender allows you to transmit a HDMI signal over Ethernet using the HDBitT transmission protocol. You can transmit a HDMI signal all around your house or office using a single Cat5e/Cat6 cable. The Plug and Play design is very easy to use simply connect both units to the HDMI devices, connect the I/R adapters and plug them into the extenders. The extender can transmit 1080p(60Hz) up to 120 Metres(using Cat6 cable).