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 voltage protection and polarity indication, and so on. Main Functions● Common telephone function: Dial, Ring, Talk● Mute● T/P switch● High voltage protection (by fuse)● Polarity indication by LED ● Volume adjust● Pause● Store phone number● Monitoring function● Last number redial ● Telecom Line Identifying (Telephone line, ISDN line, ADSL line)Key Features● Dumbbellshape, small size, simple operation● SpecialDumbbell shape design● Small size● Easy operation● Solid new materials for shell● Waterproof and vibration proofDimension & Weight● Dimension(mm): 232x73x95● Weight (kg):≤ 0.5Operation Environment● Environment temperature: -10℃~55℃● Relative humidity: 10%~95%● Environment noise: ≤60dB● Atmospheric pressure: 86~106Kpa Accessories● RJ11 assistant test cord × 1● 0.3a fuse tube x 1
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