T-Lock/Phone Defense (Version 5.0) ranked # 4
With the simple press of a button, the hqtelecom T-lock 5.0 stores a number to be permanently blacklisted, and it can be set to automatically block numbers with no caller ID. It is conveniently line powered and doesn’t need to be plugged into an outlet.
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Pro Call Blocker N2 ranked # 5
This Pro Call Blocker (also sold as SoulBay PCID01B-SB) is a highly functional, low-cost call blocker that gets the job done. Not only will it block unwanted calls on your landline, but it can also be hooked up to a fax machine to prevent unwanted faxes from wasting your paper.
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Landline Call Blocker (Version 6) ranked #7
The Lanline Blocker L09-XL features a large 5″ x 3″ LCD display with a blue backlight that has 4 different levels of brightness, so it is easily viewed at night or during the day. It conveniently works with VoIP services as well as landlines.
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