Other products by GB Gardner Bender
Item #: TGBT10
Reg. Price: $5.95
Our Price: $3.95
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Phone Line Tester GB Modular Plug Jack Single Voltage with LED Color Display, Dead Service Troubleshoot Hook-Up Cable, Part # Gardner Bender GTT100

This product is no longer available for purchase.

Please check out our Tool Section for similar products!!!!

This small, pocket-sized tester is used for troubleshooting common problem conditions with standard single line telephone hook-ups. Checks for: reversed line, presence of voltage on line, and dead line. Just plug the tester into standard telephone line jack and watch the LED indicator at the top, match the color of LED with the chart below. Cheaper than a service call!

Line Status LED Indicator Light:

  • Green: Line Okay
  • Red: Reversed Line
  • Amber: AC Voltage Present
  • Not Lit: Line Dead


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