We are offering loopback, qsfpqsfp+ passive electrical loopback eolq-xlb is used for testing qsfpqsfp+ transceiver ports in board level test. The electrical loopback provides a cost effective low loss method for qsfpqsfp+ port testing. The eolq-xlb is packaged in a standard msa housing compatible with all qsfpqsfp+ ports. Transmit data from the host is electrically routed, (internal to the loopback module), to the receive data outputs and back to the host. It provides an economical way to exercise qsfpqsfp+ ports during r&d validation, production testing, and field testing. The eolq-xlb provides qsfpqsfp+ power class 1, 2, 3 (standard), or 4 loading using a customer supplied +3.3v voltage supply. Featurescustomizable power consumptiondual led indicatorcustom memory mapsbuilt in diagnostic functionssupports 40gbps total data ratehost-pluggable msa footprintfull sff-8436 msa complianttemperature range from 0 to 80cno reference clock requiredcompliant with sonet, sdh, gbe, fcmsa compliant eepromeconomical qsfpqsfp+ port testingcustom memory mapsboard level system testingexcellent signal integrityapplicationqsfp portsystem testingitu-t recommendation g.957 (stm-1, 4 & 16)ethernet ieee 802.3 (gigabit, 10 gigabit and 40 gigabit ethernet) sdr, ddr and qdrsonet, sdh, gbe, fc support, infiniband.