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Telephone Line Tester

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ST220 telephone line tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a common Tel Line Tester, it also has the functions of high voltage protection and dangerous voltage warning, etc..

Main functions :

  • Dialing, talk, hook
  • Checking wire pairs
  • Test insulation or break faults of the line
  • Pulse/Tone switch
  • Key features:
  • DTMF applying to GB/T15279-94
  • High voltage alarm
  • Low voltage warning
  • Last number redial
  • Special durable test clamp
  • Automatic power off and energy-save design
  • Pocket size, simple operation
  • 'H
    auto;-webkit-text-stroke-width: 0px; word-spacing:0px' Automatic power off and energy-save design.
  • Pocket size, simple operation.

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