This OTDR is the newest instrument designed for testing FTTx network. It’s mainly used to measure the physical characteristics of optical fiber under test, such as the length, the transmission l

This cable tracker is designed to identify and track cables or wires within a group without damaging the insulation. For telephone line, it can identify some states in the line. Owning this instrument

ST203 Wire Tracker is used to identify and trace wires or cables within a group without damaging the insulation. For telephone line, it can identify some state in the line, and more convenience to ins

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 volt

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 te

This Telephone Line Testeris a portable and intelligent line fault tester which is designed following human engineering theory with the appearance style like barbell, adopting advanced technologies su

ST230B Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a Telephone, it also has functions of high voltage protection,

ST230C Telephone 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 has functions of high voltag

ST230D Telephone 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 vo