Read the post, and I’m more than happy to have the blocker. So far it has blocked at least 30 "Unknown Number" since I hooked it up. I know all about the Comcast block of this type of call can be blocked, but Comcast said that it can't block some numbers because they are political or charity calls. So that's why this works great!
If Comcast would only regard its costumers and change their blocking policy and block all calls that people want to not have coming in, that would be something, but they’re not into helping their costumers just making money.