ST220B-Tel Line Tester

ST220B – Telephone Line Tester

ST220B is a compact telephone line tester combining basic line tester function, auto ring, calling subscriber, checking line pair and high voltage protection. It is rather a good portable, handheld tester to the lineman.

Category: .

Product Description

Main Functions

  • Telephone functions (Dial, redial, talk and hook)
  • Fault tests (Insulation test, line break test and earthing test)
  • Checking wire pairs
  • Call subscriber & talk
  • Pulse/Tone dialing
  • Low battery check.
Key Features

  • DTMF applying to GB/T15279-94
  • High voltage alarm
  • Low voltage check
  • Last number redial
  • Special durable test clamp
  • Automatic power off and energy-save design
  • Pocket size, simple operation