Avcast distributes Audio and Video from any source to any destination cost effectively by using the coax cable as the backbone for this network. By segmenting the coax bandwidth, Avcast takes advantage of the cable that is already installed in the walls of 70 million U.S. homes. Here’s how. The following diagram illustrates how Avcast segments the coax bandwidth:

Cable TV Frequencies


Depending on the grade of coax cable (RG59 vs. RG6U) used in the home, there is between 600 and 1000 MHz of available bandwidth. The 5-55 MHz band is used by cable companies to deliver Internet access over cable. The 55-800 MHz band is where cable companies deliver TV channels 2-125. Below 5 MHz is considered too noisy to be used. This is where Broadband Home salvages unused bandwidth. The 0-2.5 MHz band is used for PC communications. The 2.5-5 MHz band is dedicated to infrared traffic. By modulating infrared signals onto a 3 MHz carrier frequency in this band, Avcast is able to transmit the signals from an ordinary remote control through hundreds of feet of coax cable to a video entertainment device located in a distant room. By modulating the audio/video from that video device to a "personal channel" (channel 65-80) the user is able to not only view the device from a distant room, but also control it.

The components that make this possible are called Casters. There are MediaCasters, which attach video devices to the network, IRCasters, which attach TVs in remote locations to the network, and the CableCaster, which acts as the "video hub" of the network and mixes video from your entertainment devices with video coming from the cable company or an outside antenna.