The HP / Agilent 37711A T1/Datacom Test Set features combined T1 and Datacom testing up to 1.5 Mbits/s. Tests on T1 (DSX and Line), RS-232, RS-449 (balanced) and V.35 interfaces. The 37711A in addition to a full range of BER tests can perform timing analysis on interface control leads with transition diagrams on the screen.