•Don’t plug in your modern until you’ve tested for over-current (digital systems, contact with high-voltage wiring and other phone line conditions such as reserved polarity or lack of signal) with the new digital phone line tester.

 

•Don’t plug in your modern until you’ve tested for over-current (digital systems, contact with high-voltage wiring and other phone line conditions such as reserved polarity or lack of signal) with the new digital phone line tester.