ST230D-Telephone Line Tester (Butt Set)

ST230D – Telephone Line Tester (Butt Set)

ST230D Tel Line Tester is a new kind of line fault tester with safety &multi-functions capabilities. Besides the basic functions as a common Tel Line Tester, it also has functions of high voltage protection and polarity indication, and so on.

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Product Description

Main functions and key features

  1. Common telephone function: Dial, Ring, Talk
  2. Mute
  3. T/P switch
  4. High voltage protection (by fuse)
  5. Polarity indication by LED
  6. Volume adjust
  7. Pause
  8. Store phone number
  9. Monitoring function
  10. Last number redial
  11. Telecom Line Identifying (Telephone line, ISDN line,ADSL line)