The FET-100 design in a portable device which provides packet capture, network monitoring , network performance testing, data generation, test leads and error test in a whole unit.It is widely used in network layer 1/2/3 BER test and RFC-2544 test.FET-100 help maintenance people to quickly locate fault and analysis network. https://www.grandwaytelecom.com/products/instrument/ethernet-tester/1157.htmlAll Rights Reserved