ST332B GFAST tester is multi-functional hand-held  test instrument with small size, specially designed for xDSL line test (xDSL include: ADSL, ADSL2, ADSL2+, READSL, VDSL2 up to 35b, G.Fast) and maintenance It provides xDSL test, PPPoE dial test, DMM test, Modem emulation, line voltage indication and so on.