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.A phone line tester is used for detecting either digital or analog phone systems as well as the line polarity. Telephone line testers are good for both personal and professional use. Fiberstore supply some mini phone line tester,and other Telephone line tester.

ST220B telephone line tester 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.

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

Technical Specifications
Insulation resistance test Range (MΩ) 0~10

General specifications
Ring distance (Km) ≤1
Line break resolution (Km) ≤3
Weight (kg) ≤0.22 D
Dimension (mm) :146×54×37
Battery (V): 9

This Telephone Line Tester is belong to FiberStore.com of fiber optic tool. Fiberstore is your reliable supplier of telephone line tester, if you want this high quality and effective cable tracker ST220B at a large quantity, please contact us at [email protected], we will give you a special discount.