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.

ST220 Tel 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

Technical Specifications
Insulation impedance test
Range (MΩ)0~10
General specifications
Ring distance (Km)≤ 1
Line break resolution (Km)≤ 3
Weight (kg)≤ 0.22
Dimension (mm) 146× 54× 37
Battery (V)9

FiberStore.com is a worldwide leading manufacturer & supplier of fiber optic products. We have been in these business almost 7 years. We have our own factory and our own professional R&D department. We are specializing in supplying fiber optic components and network equipment.