... is a handheld ADSL/ADSL2/ADSL2+ line test and analysis instrument, whichcan test physical layer, network layer and application ... ADSL2 and G.992.5 ADSL2+- Test upstream, downstream, maximum speed and channel utilization- Test upstream and downstream noise margin, and ... testingCable testing- Digital Multi Meter, DMM is used to test loop resistance, insulation resistance, capacitance, AC/DC voltage and ...