Advertisements Comcast showed up at my front door today to rip out my cable and replace it with fiber optics. But its not just plain jane fiber optics, it is EPON! See the EPON link, but if you want to cut to the chase: CableCARDs are not currently supported. TiVo devices currently are not compatible with the IP-based fiber network deployed at your property. We hope that TiVo works to develop devices that will be compatible with this technology and the Xfinity Stream app. When I called TiVo, they said "switch to another provider", they might as well say, "Move to another location where you have FIOS as an option". "Xfinity looks forward to providing you with the best service possible and enhancing your entertainment experience in the future."