... comprehensive test tool with E1, V port, Gigabit Ethernet link maintenance and failure diagnose. FunctionsG.703 E1 circuit FAS, CRS ... V.35 interface error testvarious working mode setITU error indicator analysissupport two layers protocol encapsulation (PPP/HDLC protocol) on E1 ... test throughput, latency, package loss rate and back to back buffer frames, check fully network performance indexesdata ...