Sell ST230F Telephone Line Tester(Butt Set) best price

Brief Introduction 　ST230F Telephone Line Tester is one portable and intelligent line fault tester, which adopts advanced technologies such as intelligent CPU, IC & surface mounted technology (SMT) technology. It integrates various kinds of functions such as telephone, line performance test and safety test to be the one. Main functions and key features 　1. Telephone line fault checking 　2. Monitor, ISDN/ADSL identification 　3. Hand free function(two speak ways, loudspeaker) 　4. Calling number displaying 　5. One Key override lockout function Data lockout override function 　6. Tone/pulse transfer function 　7. High DC voltage indication 　8. High AC voltage alarm 　9. Low voltage self-checking, automatic power off and energy-save design 　10. Memory key(10 groups of 18 digits) 　10. Telephone functions(Dialing, Receiving, Redial) 　11. Caller telephone number display 　12. Telephone number storage and dial function 　13. Mute function 　14. Tester test (AC V & DC V test, Insulation test, Open line test, Earth insulation) 　15. Call user & talk 　16. Check wire pairs