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Title: Unreliable-two have failed within weeks
Review: I've lost two of these within weeks of installation, the first after three weeks and the second after two. Symptom is that it stops ringing the phone, then a day later it fails to produce dialtone nor transmit audio to the host PC. I've checked the USB port voltage, no problems. We don't connect the box directly to our house telco line (only to a phone and to the PC), so the trouble is not due to line disturbances (e.g., lightning). I'm switching to another vendor's product, as this one appears to be too fragile a design to survive actual use in the real world. Too bad, as it works nicely at first.
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