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Review title: Great call blocker!
Product review: I use this unit as a call blocker. As such, it works well. It's connected between the wall jack and the base station on a 4-phone wireless system. I block all toll free numbers, using wild cards for the last 7 digits. It can also selectively block individual numbers. It is compatible with Vonage, which requires the country code to be entered on the unit. The phone does not ring and the answering machine does not pick up when a blocked number is calling. The ID is displayed on the unit for all calls. My only complaint is that the ID is not passed on to any of my phones, even non-blocked calls. Maybe this is not technically feasible. A workaround might be to plug your TV into a wall jack if it has caller ID display capabilities. The documentation is poorly organized but all the information is there. Just read it carefully.
