AirPort Extreme IS incompatible with Comcast.
Since August 28th in Fort Lauderdale, Apples Airport Extreme became incompatible with the Comcast network. There IS NOT a resolution to this incompatibility. Certain trained support agents have been able to offer a temporary connection. Most support agents fail miserabley & cannot provide whatever knowledge the experienced agents apparently do have. This is a a complete Comcast FAIL, AT&T fiber is the ONLY choice left.