Functions                                                                                                       English menu, large screen display and simple operation;
Multi-task operation (test and browse former records simultaneously)
Test level, Variation of gain with frequency, Variation of gain with input level, quantizing distortion, Idle channel noise, crosstalk, Return loss and balance to ground;
End to end and loop-back test; 
Single-channel or 30 channels automatic test, and print it as report form.
Full-automatic mode, manual mode, full-automatic mode could select one item, several items or all of measurement indexes, and the test step length could be programmable;                                                                              It could store over 60 groups of measurement results; the test setup memory could be up to 9; it could also operate non-volatile memory;
Built-in generator and receiver, the output interface and input interface are respectively with direct current loop feed circuit and direct current loop hole circuit, not only it could measure E&M 2/4 line interface, but also it could measure LGE、FXO，LGS、FXS interface;                                       Test result pattern display, compare with built-in ITU-T rec;
Measurement result could upload to PC, and take it for analysis, filing and printing;