Brief Introduction
ST230D Tel 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 voltage protection and polarity indication, and so on.
Main Functions
<1>Common telephone function: Dial, Ring, Talk
<2>Mute
<3>T/P switch
<4>High voltage protection (by fuse)
<5>Polarity indication by LED
<6>Volume adjust
<7>Pause
<8>Store phone number
<9>Monitoring function
<10>Last number redial
<11>Telecom Line Identifying (Telephone line, ISDN line, ADSL line).
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