Optech’s Loopback Transceivers series includes 10G SFP, 40G QSFP, 25G SFP28 and 100G QSFP28. Loopback is a cost effective and high quality solutions to test transceivers ports. Loopback are compatible with both copper and optical 10G SFP/ 40G QSFP / 25G SFP28 / 100G QSFP28 enabled ports, they perfectly replicate the performance range of typical of a 10G SFP, 40G QSFP, 25G SFP28 and 100G QSFP28 connection between equipped adapter cards, blade servers, routers, and switches.