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Review title: Worked good at first.......
Product review: but after 5 weeks it no longer displayed the caller-id number. All calls displayed as "unavailable". Of course, I checked the jack with another caller-id unit. Thankfully, I was still within Amazon's return period. While it's tempting to order another one - to see if I have better luck - I'm permitting wisdom's guidance to steer me away from doing that.
