... test and optical power test..ST335 can test all kinds of xDSL line (xDSL includes ADSL, ADSL2, ADSL2+, READSL etc.) ... to test the optical power and set the calibrating points of six wavelengths: 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm.-File ... DMT sub-channel 0~15 and each sub-channels' frequency pointsThe number of error codesCRC, HEC, FEC, NCD, OCDOptical Power TestWavelength range ...